AV S SE R IE S C ARB URE T OR B B D S E R I E S CA R B U R E T O R
2 6
H O L L E Y 2200 S E R I E S C A R B U R E T O R H O L L E Y 4160 S E R I E S C A R B U R E T O R
F U E L P U M P F U E L T A N K S
55 57
THR OTTLE LINK AGE SPECIFICATIONS
GENERAL
6
Page
14 37 63 64
INFORMATION
SERVICING
CARBURETOR
D i r t , d u s t , w a t e r an d g u m m y
further advisable to rinse all parts in clean gasoline or kerosene to be cert ain no tr ace o off moisture rema ins.
d e p o s i t s ar e s o m e of
t h e m a i n c a u s e s f o r p o o r c a r b u r e t o r o p e r a t iio o n . H o w e v e r , p r o p e r
c l e a n i n g a n d t h e i n s t a l l a t i o n of new
p a r t s , w h e r e r e q u i r e d , w i l l r e t u r n t h e c a r b u r e t o r t o
Never clean jets with a wire, drill or other mechanical means making
because the
the
fuel
orifices
mixture
may
too
become
rich
for
enlarged,
proper
per
formance.
i t s o r i g i n a l d e s i g n e d p e r f o r m a n c e .
W h e n o v e r h a u l i n g t h e c a r b u r e t o r , s e v e r a l i t e m s of i m p o r t a n c e s h o u l d b e o b s e r v e d t o a s s u r e a g o o d j o b :
A U T O M A T I C C H O K E ( W e lll l T y p e )
(1 ) A l l p a r t s ( e x c e p t t h e c h o k e d i a p h r a g m a s s e m
A n e w d e s i g n w e l l f o r t h e a u t o m a t i c c h o k e h a s b e e n
b l y ) s h o u l d be c a r e f u l l y c l e a n e d i n a s u i t a b l e s o l v e n t ,
40 0 cu . in . tr ii n c o r p o r a t e d i n a l l e n g i n e s e x c e p t the 44 c a r b i n s t a l l a t i o n a n d t h e 4 2 6 c u . i n . H e m i . T h i s n e w
t h e n i n s p e c t e d f o r d a m a g e o r w e a r . (2 ) U se ai r p r e s s u r e o n ly l y , t o c l e a r t h e v a r i o u s o r i
r e s u l t i n g i n l e a n e r f u e l m i x t u r e s d u r i n g t h e w a r m - u p
f i c e s a n d c h a n n e l s .
(3 ) R e p l a c e
d e s i g n a l l o w s f a s t e r o p e n i n g o f t h e c h o k e m e c h a n i s m
ques tion able
p a r t s w i t h N E W o n e s .
W h e n c h e c k i n g p a r t s r e m o v e d f r o m t h e c a r b u r e t o r , i t i s at t i m e s r a t h e r d i f f i c u l t to be s u r e t h e y ar e s a t i s
f a c t o r y f o r f u r t h e r s e r v i c e . I t
i s t h e r e f o r e ,
recom
( F i g . 1).
T o f u n c t i o n p r o p e r l y , i t i s i m p o r t a n t t h a t al l p a r t s
b e c l e a n an d m o v e f r e e l y . O t h e r t h a n an o c c a s i o n a l c l e a n i n g , t h e a u t o m a t i c
h c a s e , N E W p a r t s b e i n s t a l l e d . m e n d e d t h a t i n s u c h
( 4 ) A l w a y s u s e a c o m p l e t e k i t w h e n
p e r i o d f o r r e d u c e d e m i s s i o n s a n d f u e l c o n s u m p t i o n .
overhaulin g
choke
control
r e q u i r e s no
s e r v i c i n g . H o w e v e r , i t i s v e r y i m p o r t a n t t h a t t h e c h o k e
t h e c a r b u r e t o r . U s i n g t h e c o d e n u m b e r s t a m p e d o n
control
t h e ai r h o r n , a d j a c e n t t o t h e f u e l i n l e t , r e f e r to th e
s p r i n g h o u s i n g a n d a t t h e c h o k e s h a f t . M o v e t h e c h o k e
p a r t s c a t a l o g an d o r d e r t h e c o r r e c t r e p a i r k i t f o r t h e
r o d u p a n d d o w n t o c h e c k f o r f r e e m o v e m e n t i n th e
c a r b u r e t o r b e i n g w o r k e d on .
c o i l h o u s i n g . I f u n i t
CLEANING CARB UR ETOR T h e r e c o m m e n d e d
denatured
work s
f r e e l y a t t h e t h e r m o s t a t i c
co il
b i n d s , a new u n i t s h o u l d b e i n
s t a l l e d . . The wel l type choke is servi ced as an assembly. Do not attempt to repair or change the setting, unless
PA RTS
s o lv l v e n t f o r
unit
g u m d e p o s i t s i s
a l c o h o l w h i c h i s e a s i l y o b t a i n a b l e . H o w
e v e r , t h e r e a r e o t h e r c o m m e r c i a l s o l v e n t s , ( s u c h as
M e t a l c l e n e ) w h i c h m a y b e u s e d w i t h s a t i s f a c t o r y r e sults.
T h e c h o k e d i a p h r a g m c a n b e d a m a g e d b y s o l v e n t s .
A v o i d p l a c i n g t h e d i a p h r a g m a s s e m b l y i n A N Y l i q u i d .
authorized by s e r v i c e l i t e r a t u r e . C h a n g e s o off t h e c h o k e setting
materially
affect
summer
temperature
cold
starting and seldom are a satisfactory correction of drive-ability problems, which are generally associated with carburetors or vacuum diaphragms.
Tw o type ess of w e l l s a r e i n g e n e r a l u s a g e . O n e i s c a s t a s a n i n t e g r a l p a r t o f t h e m a n i f o ld l d . T h e s e c o n d i s a
C l e a n t h e e x t e r n a l s u r f a c e s w i t h a c l e a n c l o t h o r s o f t
w i r e b r u s h . S h a k e d i r t o r o t h e r f o r e i g n m a t e r i a l f r o m t h e s t e m s i d e o f t h e d i a p h r a g m . D e p r e s s i n g t h e d i a p h r a g m s t e m t o t h e r e t r a c t e d p o s i t i o n , w i l l p r o v i d e an additional
h o l e f o r t h e r e m o v a l of d i r t . C o m p r e s s e d
a i r c a n b e u s e d t o r e m o v e l o o s e d i r t , but should not be connected to the vacuum inlet fitti ng. connected IMPORTANT: If
the commercial
solvent
or cleaner
recommends the use of water as a rinse, it should be HOT
After
b l o w n from
rinsing,
the
all
passages
trace
of
with
air
water
must
pressure.
It
PY138
be is
Fig. I — Choke hoke C o n t r o l l (Open Wel l) B-cy Under
Engine
14 -2
F U E L S Y S T E M -
s t a i n l e s s s t e e l c u p f a s t e n e d o v e r a p o r t i n t h e m a n i f o l d ( F i g . 1). T h e s t a i n l e s s s t e e l w e l l c u p s a r e h e l d i n p l a c e b y c h o k e r e t a i n e r b o l t s . A steel-asb estos gask et s e a l s t h e e x h a u s t ga s w i t h i n t h e m a n i f o lld d . L o o s e n i n g o r r e m o v
CARBURETOR CRANKCASE VENTILATION
VALVE
AIR CLEANER
BOWL VENT VALV E
CLEANER TO CA P HOSE
ing the choke retainer bolts will allow exhaust gases
tToHeEs ccaa Ep N e Gi nI tNo Et h eWe InTgHi nOe Uc To m pT aHr tEm eCnHt .ODKOE N OF TI R M R ULNY BREATHER CAP
B O L T E D T O T H E M A N I F O L D . F IIR R E O R H E A T D A M
AG E M AY OCCUR. W h e n i n s t a l l i n g t h e s t e e l w e l l c u up p , m a k e c e r t a i n t h e g a s k e t i s i n g o o d c o n d i t i o n a n d i s i n p l a c e t o p r e v e n t exhaust leakage. D o n o t l u b r i c a t e a n y o f t h e c h o ok ke parts o r t h e con t r o l l u n i t . T h i s c a u s e s d i r t t o a c c u m u l a t e , a n d w o u l d r e s u l t i n bi b i n d i n g o f t h e c h o k e m e c h a n i s m . T h e c h o k e c o n t r o l u n i t i s a c cu cu r a t e l y a d j u s t e d w h e n first a s s e m b llee d . U n d e r n o r m a l s e r v i c i n g d o N O T c h a n g e t h e s e t t i n g o r d i s a s s e m b l e t h e c o n t r o l u n i t . I f h o w e v e r , t h e s e t t i n g h a s b bee e n d i s t u r b e d , r e s e t a s f o l l o w s : L o o s e n l o c k n u t a n d t u r n s h a f t w i t h s c r e w d r i v e r u n t i l i n d e x m a r k o n d i s c i s i n a l i gn g n m e n t w i t h c o r r e c t m a r k o n t h e f r a m e . H o l d i n t h i s p o s i t i o n w i t h s c r e w d r i v e r w h i l e t i g h t e n i n g n u t , ( R e f e r t o Sp ecifica t i o n s f o r i n d e x i n g ) . A l l t h e c a r b ur ur e t o r s r e f e r r e d t o i n t h e F u e l S y s t e m a r e e i t h e r e q u i p p e d f o r u s e w i t h a C l e a n e r A i r S y s t e m ( C.A.S.) or a n E v a p o r a t i o n C o n t r o l S y s t eem m , ( E.C.S.) de p e n d i n g o n t h e a r e a i n w h i c h t h e v e h i c l e i s t o b e u s e d . T h e s e r v i c i n g p r o c e d u r e s c o v e r i n g tth hese carburetors a r e n e a r l y i d e n t i c a l . D i f f e rree n c e s b e t w e e n t h e t w o t y p e s o f c a r b u r e t o r s a r e c o v e r e d ( w h e r e a p p l i c a b l e ) i n t h e s e r v i c e p r o c e d u r e s .
C L E A N E R A I R SYST EM
(C. A. S. )
T h e c l e a n e r a i r s ys y s t e m c o n s i s ttss o f a s p e c i a l a i r c l e a n e r , b r e a t h e r c a p , v e n t i l a t i o n v a llvv e , c a r b u r e t o r , d i s t r i b u t o r a n d v a r i o u s o t h e r a u t o m a t i c c o n t r o l d e -
VENT VALVE TO CARBURETOR HOSE
CRANKCASE (VAPOR STORAGE
AREA )
PY598
F i g . 2 — C l e a n e r A i r System ( C . A . S . J v i c e s , ( F i g . 2 ) a s r e q u i r e d . T h e f u n c t i o n o f t h e c l e a n e r a i r s y s t e m i s t o r e d u c e t h e u n b u r n e d h y d rro o - c a rb rb o n s e m i t t e d b y t h e v e h i c l e ' s e n g i n e . F r e s h a i r i s d r a w n i n t o t h e a i r c l e a n e r , f o r c o n s u m p t i o n b y t h e e n g i n e . A p o r t i o n o f t h i s f r e s h a i r i s d i v e r t e d t h r o u g h a h os o s e t o t h e b r e a t h e r c a p a n d i n t o t h e cr c r a n k c a s e . M a n i f o l d v a c u u m ccaa u ssee s c r a n k c a s e v a p o r s ( i n c l u d i n g f r e s h a i r a n d u n b u r n e d h y d r o - ccaa r b o n s ) t o f l o w t h r o u g h t h e c rraa n k c a s e v e n t i l a t i o n v a l v e t o t h e b a s e ((o o r t h r o t t l e b o d y ) o f t h e c a r b u r e t o r . T h e s e v a p o r s a r e j o i n e d w i t h t h e fu f u e l m i x t u r e i n t h e i n t a k e m a n i f o l d a n d a r e d e l iv i v e r e d i n t o t h e c o m b u s t i o n c h a m b e r , f r o m w h i c h t h e y a r e e j e c t e d a s e s s e n t i a l l y c o m plete ly burn ed exhaust products.
EVAPORATION CONTROL SYSTEM (E.C.S.) T h e e v a p o r a t i o n c o n t r o l s y s t e m c o n s i s t s o f t h e C . A . S . s y s te t e m p l u s , a s pe p e c i a l v e n t e d f u e l t a n k , sep a r a t o r , f u e l t a n k v a p o r t u b e , b r e a t h e r c a p , e n c l o s e d b o w l v e n t v a l v e , a va va c u u m p r e s s u urr e r e l i e f f u e l t a n k ca p a n d h os o s e s ( F i g . 3).
PY599
F i g . 3 — E v a p o r a t i o n C o n t r o l System
(EX.S.)
A
FUEL SYSTEM
14-3
p a s s e s t h r o u g h v e n t h o s e s e c r a n k c a s e . s o r t u b e s t o t h e
W i t h t h e e n g i n e r u n n i n g , v a p o r s a r e p u r g e d f r o m t h e c r a n k c a s e t h r o u g h t h e c r a n k c a s e v e n t i l a t i o n s y s t e m ,
and vice versa.
T h e f u n c t i o n o f t h e e v a p o r a t i o n c o n t r o l s y s t e m is is t o r e d u c e t h e l o s s o f f u e l f r o m t h e f u e l s y s t e m t o t h e
a t m o s p h e r e b y e v a p o r a t i o n a n d r e d u c e t h e u n b u r n e d h y d r o - c a r b o n s e m i t t e d b y t h e v e h i c l e ' s e n g i n e . W h e n
f u e l e v a p o r a t e s f r o m t h e c a r b u r e t o r o r f u e l t a n k , i t
a s i n t h e C l e a n e r A i r S y s t e m p r e v i o u s l y d e s c r i b e d .
( a ) A d j u s t e a c h s c r e w 1 / 1 6 t u r n
ric her
( c o u n te r
T h e f u e l t a n k c o n t a i n s a o n e g a l l o n o v e r f i l l
lim iter
10 s c l o c k w i s e ) a n d w a i t 10 s e c o n d s b e f o r e r e a d i n g m e t e r .
t a n k . W h e n t h e f u e l t a n k i s filled, t h e o v e r f i l l
lim iter
(b ) I f n e c e s s a r y , r e p e a t s t e p " a " u n t i l m e t e r i n d i
t a n k r e m a i n s e s s e n t i a l l y e m p t y , t o a l l o w f o r t h e r m a l
c a t e s s a d e f i n i t e i n c r e a s e i n r i c h n e s s ( l o w e r
read ing ).
e x p a n s i o n . E a c h c o r n e r o f t h e f u e l t a n k i s v e n t e d a n d
T h i s s t e p i s v e r y
e h o s e s f r o m t h e s e v e n t s a r e c o n n e c t e d t o e a c h o f t h e
r e a d i n g s a n d i n d i c a t e s a r i c h e r m i x t u r e a s c a r b u r e t o r
t h e s e p a r a t o r . A t u b e f r o m t h e s e p a r a t o r l e a d s t o t h e
i s l e a n e d o u t i f c a r b u r e t o r i s s e t t o o l e a n .
breather
cap . Th us
evaporated
fuel
v a p o r f r o m t h e
i m p o r t a n t s i n c e m e t e r r e v e r s e s i t s
(c ) W h e n i t h a s b e e n e s t a b l i s h e d t h a t m e t e r i s i n d i
f u e l t a n k , f lo lo w s t h r o u g h t h e s e p a r a t o r , t o t h e e n g i n e
c a t i n g a l o w e r
c r a n k c a s e a n d t h e n t h r o u g h t h e c r a n k c a s e v e n t i l a t i o n
m i x t u r e s c r e w s s a r e t u r n e d i n r i c h e r d i r e c t i o n , p r o *
s y s t e m . . I n a d d i t i o n , t h e c a r b u r e t o r
c e e d t o a d j u s t c a r b u r e t o r t o g i v e 14.2 a i r / f u e l
fuel
bowl
vent
read ing
(richer
mix ture)
v a l v e i s a all s o i n c l u d e d , b y a t u b e f r o m t h e v e n t v a l v e
t u r n i n g s c r e w s c o u n t e r c l o c k w i s e
t o t h e b r e a t h e r
meter
c a p , o r f u e l p u m p . (6 C y l i n d e r e n
r e a d i n g a n d c l o c k w i s e
wh en
idle ratio,
( r iicc h e r ) t o l o w e r
( le l e a n e r ) t o i n c r e a s e
g i n e s . ) T h i s c o m p l e t e l y s e a l s t h e f u e l s y s t e m .
met er reading. (d ) I f i d l e s p e e d c h a n g e s as m i x t u r e s c r e w s a r e
Idle Spee Speed d
t u r n e d , a d j u s t s p e e d t o s p e c i f i e d v a l u e a n d r e a d j u s t
Adjustment
(Curb
Idle)
T o m a k e t h e i d l e s p e e d a d j u s t m e n t o n c a r b u r e t o r s , s e c u r e e a n a c c u r a t e i g n i t i o n
t a c h o m e t e r a n d a S u n
E l e c t r i c C o m b u s t i o n - V a c u u m U n i t , M o d e l 80 , E x h a u s t
9-- 1 14 4 o r e q u i v a l e n t . C o n d e n s e r , M o d e l E C , a n d H o s e 6 6 9 ( T h e a b o v e a n a l y z e r i s r e c o m m e n d e d ; h o w e v e r , o t h e r r e l i a b l e m a k e s o f a n a l y z e r s i n g o o d c o n d i t i o n m a y b e u s e d ) . P r o c e e d a s f o l l o w s :
( 1 ) E n g i n e r u n n i n g at n o r m a l
operating
tempera
t u r e , a n d t i m i n g c h e c k e d , ( r e f e r t o D i s t r i b u t o r S p e c i fications).
( 3 ) A u t o m a t i c t r a n s m i s s i o n s i n n e u t r a l p o s i t i o n (n o t in park po sition). (4 ) O n a i r c o n d i t i o n e d c a r s , t u r n a i r c o n d i t i o n i n g
off. (6 ) I n s e r t
tach om eter.
p i p e a s f a r a s p o s s i b l e (2 ft. m i n i m u m
d i s t a n c e ) . O n
d u a l e x h a u s t c a r s u s e l e f t s i d e t a i l p i p e ( s i d e o p p o s i t e h e a t v a l v e ) . I t i s v e r y i m p o r t a n t t h a t p r o b e a n d c o n n e c t i n g t u b i n g b e f r e e o f l e a k s t o p r e v e n t e r r o n e o u s r e a d i n g . I f a g a r a g e e x h a u s t s y s t e m i s u s e d t o c o n
d u c t e x h a u s t g a s e s a w a y , a p l e n u m c h a m b e r o r o t h e r m e a n s m u s t b e u s e d t o r e d u c e v a c u u m o r e x h a u s t s y s t e m t o 1 / 2 i n c h w a t e r o r l e s s .
e x h a u s t g as a n a l y z e r , w a r m u p a n d
c a l i b r a t e a c c o r d i n g to m a n u f a c t u r e r ' s i n s t r u c t i o n s . (8 ) D i s c o n n e c t h o s e
betw een
dis tributor
va cu um
co ntrol valve and intake m anifol d. (9 ) Se t i d l e
ROUGH
s p e e d t o s p e c i f i e d v a l u e f o r s p e c i f i c
e n g i n e - t r a n s m i s s i o n c o m b i n a t i o n .
( 1 0 ) I M P O R T A N T : W h e n a d j u s t i n g m i x t u r e s c r e w s
I D L E AND LOW S P E E D
SUR GE
R o u g e i d l e a n d l o w s p e e d s u r g e o n v e h i c l e s ( u s i n g 1 -1 /2 " B E D , , A V S , a n d H o l l e y 4 1 6 0 c a r b u r e t o r s ) m a y
b e t h e r e s u l t o f i m p r o p e r i d l e s e t t i n g b a l a n c e b e t w e e n t h e r i g h t a n d l e f t c a r b u r e t o r b o r e s . T o c o r r e c t t h i s c o n d i t i o n t h e f o l l o w i n g s t e p s s h o u l d b e f o l l o w e d . R e m o v e t h e p l a s t i c c a p s f r o m t h e t w o i d l e
s c r e w s s i n b a s e o f c a r b u r e t o r ( 1 - 1 //2 2 " BED BED an an d A V S )
o r c u p or in the e s i d e s s i f t h e p r i m a r y m e t e r i n g
block
( H o l l e y ) . ( F i g s . 1 , B E D , A V S , a n d H o l l e y ) . (2 ) W i t h e x h a u s t t h o r o u g h l y w a r m e d u p , i n s t a l l a n approved
p r o b e o f e x h a u s t g as a n a l y z e r i n t a i l
(7) C o n n e c t
t a i n e d at s p e c i f i e d i d l e s p e e d .
(1)
(2 ) A i r C l e a n e r i n s t a l l e d .
(5 ) C o n n e c t i g n i t i o n
m i x t u r e as r e q u i r e d s o t h a t 14.2 a i r / f u e l r a t io io i s o b
e x h a u s t g as a n a l y z e r f o r c a r b u r e t o r
s p e e d a n d m i x t u r e
idle
a d j u s t m e n t as d e s c r i b e d u n d e r
"Idle Speed Ad jus tm ent" . (3 ) W i t h a n a r r o w s c r e w d r i v e r , t u r n t h e t w o i d l e s c r e w s c l o c k w i s e u n t i l t h e y a r e b o t h s e a t e d .
( 4) 4) T u r n b o t h i d l e s c r e w s 1-1/2 t u r n s c o u n t e r c l o c k w i s e f o r 1 -1 /2 " BB D c a r b u r e t o r s a n d 2 to 3 t u r n s c o u n t e r c l o c k w i s e f o r A V S c a r b u r e t o r s a s a s t a r t i n g
p o i n t ( e x p e r i e n c e m a y d i c t a t e m o r e o r l e s s t u r n s as a roug h
s e t t i n g b u t b o t h s c r e w s s h o u l d b e t u r n e d
equally).
( 5) 5) S t a r t e n g i n e a n d s e t s p e c i f i e d i d l e s p e e d f o r e n g i n e s w i t h 300 o r m o r e m i l e s . S e ett 75 r p m b e l o w s p e c i
f iicc a t io io n s
i f u n d e r 50 m i l e s o r 50 50 r p m b e l o w s p e c i f i c a
t i o n s i f 50 to 3 0 0 m i l e s a r e o n e n g i n e .
(6 ) O b s e r v e a i r / f u e l
ratio
r e a d i n g o f e x h a u s t g a s
a n a l y z e r . T u r n e a c h s c r e w 1 / 1 6 t u r n r i c h e r ( c o u n t er er -
14-4
A
FU EL SYST EM s c r e w s b e t u r n e d
c l o c k w i s e ) a n d n o t e c h a n g e i n a i r / f u e l m e t e r r e a d i n g .
the sam e amo unt on
F r o m t h i s p o i n t o n , f o l l o w i n s t r u c t i o n s f o r i d l e s e t t i n g
m en t so that
un til
s a m e n u m b e r o f t u r n s f r o m t h e s e a t e d p o s i t i o n .
14 4.. 2 a i r / f u e l
ratio is obtain ed
a att
appro xim ate
i d l e s p e e d . It It i s v e r y i m p o r t a n t t h a t b o t h i d l e l i m i t e r
as finally
eac h adjus t
s e t b o t h s c r e w s w i l l
be
the
(7 ) I n s t a l l p l a s t i c c a p s o v e r i d l e s c r e w s .
SERVICE DIAGNOSIS C o n d i ti o n POOR IOLING
P o ssi b l e C au se
Correction
(a) Idle air bleed carb on ized or of incor r e c t s i z e . (b) Idle d is ch arg e gummed.
(c) Throttl e body t h r o t t l e s h a f t .
hol es
plugged
c arb on ized
or
or
w orn
(d) Dam age d or worn idle mix ture need le. (e) L ow grade fuel or inc orr ec t float level.
(f )
L o o s e m a i n screws.
(g) Worn seat.
P O O R A C C E L E R A T I O N
or
body
cor rod ed
t o t h r o t t l e b o d y
needl e valve
an d
(g)
level. T i g h t e n m a i n b o d y t o t h r o t t l e b o d y s c r e w s s e c u r e l y t o p r e v e n t a i r l e a k s a n d c r a c k e d h o u s i n g s . Cl ean and in sp ec t needl e valve an d s e a t . I f f o u n d t o b e i n q u e s t i o n a b l e condition, replac e ass em bly . Th en, t e s t f u e l p u m p p r e s s u r e . R e f e r t o S p e c i f i c a t i o n s f o r c o r r e c t f u e l p u m p pressure. A d j u s t v a l v e s . C h e c k i g n i t i o n s y s t e m , R e s e t t i m i n g .
(h) (i ) ( j )
(a a)) A c c e l e r a t o r p u m p p i s t o n ((o or plung er) leather too hard , wo rn, or loose on stem.
(a a)) D i s a s s e m b l e c a r b u r e t o r . R e p l a c e a c c e l e r a t o r p u m p a s s e m b l y i f l ea ea t h e r i s h a r d , c r a c k e d o r w o r n . T e s t f o l l o w - u p s p r i n g f o r c o m p r e s s i o n . ( b ) D i s a s s e m b l e c a r b u r e to to r . U s e c o m p r e s s e d a ir to c le a n d is c h a r g e n o z z le er s o a k i n g m a i n b o d y a n d c h a n n e l s a f t er i n a s u i t a b l e s o l v e n t . T e s t a c c e l e r a t o r pump c apacity. ( c ) D i s a s s e m b l e c a r b u r e t o r . C h e c k a c c e l e r a t o r p u m p i n l e t c h e c k b a l l f o r p o o r s e a t o r r e l e a s e . I f p a r t i s f a u l t y , replace. ( d ) T e s t f u e l o r f l o a t l e v e l i n c a r b u r e t o r . A d j u s t a s n e c e s s a r y t o o b t a i n c o r r e c t float level. (e e)) D i s a s s e m b l e carbu retor. Rep lac e w o r n a c c e l e r a t o r p u m p a n d t h ro t t l e l i n k a g e a n d m e a s u r e f o r c o r r e c t p o s i tion. ( f) f) F r e e u p m a n i f o l d h e a t c o n t r o l v a l v e ;
ac cel erato r
pum p
( c ) F a u l t y a c c e l e r a t o r p u m p ball.
disc harg e
i n l e t c h e c k
(d) Inc orr ect fuel or float level.
(e e)) W o r n a c c e l e r a t o r p u m p linkage.
( f) f)
a n d throttle
Manifold h eat valv e st ic kin g.
(g) No pow er mixt ure. (h) Incorr ect timing. ( i) i) I n c o r r e c t p u m p s e t t i n g . FLOODS
( f) f)
( h ) I n c o r r e c t v a l v e l a s h . ( i ) E n g i n e m i s s ( i g n i t i o n ) , ( j) j) I n c o r r e c t t i m i n g .
(b) Faulty ball.
CARB URETOR O R L E A K S
(a a)) D i s a s s e m b l e c a r b u r e t o r . T h e n , u s e c o m p r e s s e d a i r t o c l e a r i d l e b l e e d after so aki ng it in a suita ble solv ent. ( b) b) D i s a s s e m b l e c a r b u r e t o r . T h e n , u s e o c l e a r i d le le d i s c h a r g e c o m p r e s s e d a i r tto h o l e s a f t e r s o a k i n g m a i n a n d t h r o t t l e b o d i e s i n a s u i t a b l e s o l v e n t . ( c ) D i s a s s e m b l e c a r b u r e t o r . C h e c k t h r o t t l e v a l v e s h a f t f o r w e a r . If If e x c e s s i v e w e a r i s a p p a r e n t , r e p l a c e throttle body ass em bly . (d) Rep lac e wor n or dam age d idle need le. A d j u s t a i r m i x t u r e . ( e ) T e s t f u e l l e v e l i n c a r b u r e t o r . A d j u s t a s n e c e s s a r y t o o b t a i n c o r r e c t f l o a t
(a) Cr ac ke d body.
u s i n g r e c o m m e n d e d s o l v e n t . ( g ) T e s t p o w e r p i s t o n o p e r a t i o n . ( h ) R e s e t t i m i n g . ( i ) R e s e t p u m p .
(a a)) D i s a s s e m b l e c arburetor. Rep lac e c r a c k e d b o d y . M a k e s u r e m a i n t o t h r o t t l e b o d y s c r e w s a r e t i g h t
Condition
(b )
(b ) F a u l t y b o d y g a s k e t s .
( c ) High float l e v e l .
(d ) Worn n e e d l e v a l v e a n d s e a t .
( e ) E x c e s s i v e f u el el p u m p p r e s s u r e .
P O O R R P E R F O R M A N C E MIXT URE TOO RICH
( a) a) R e s t r i c t e d a i r c l e a n e r . ( b ) L e a k i n g float.
( c ) Hig h h float l e v e l . (d ) E x c e s s i v e f u el el p u m p p r e s s u r e .
(e ) Worn m e t e r i n g
POOR COL D EN GIN E S T A R T IN G I N C O R R E C T PROCEDURE C H O K E V A L V E F A I L S T O C L O S E
OUTPUT
( 1 0 ° F or l ower)
Disass emb le carburetor. Repl ace de fective gas kets and tes t for leakage. B e s u r e s c r e w s a r e t ig ig h t e n e d s e curely. ( c ) T e s t f u e l l e v e l i n c a r b u r e t o r . Make n e c e s s a r y a d j u s t m e n t t o o b t a i n c o r r e c t float l e v e l . (d) Clean and ins pec t need le valve an d s e a t : IIff f o u n d t o b e i n a q u e s t i o n a b l e condition, replace co mp lete ass emb ly and test fuel pu mp pr ess ure. Refer to Specific ations fo fo r correc t fuel pump pressure. (e e)) T e s t f u e l p u m p p r e s s u r e . I f p r e s s u r e i s i n e x c e s s o off r e c o m m e n d e d p r e s s u r e ( rre efe err t o S p e c i f i c a t i o n s ) , r e p l a c e fuel pump. (a a)) R e m o v e a n d c l e a n a i r c l e a n e r . (b ) D i s a s s e m b l e carburetor. Replac e l e a k i n g float. T e s t float l e v e l a n d c o r rect as nec ess ary , to proper level. ( c ) A d j u s t float l e v e l a s n e c e s s a r y t o s e c ur e prop er level. (d) Tes t fuel p um p pr ess ure . Refer to specific ations for reco mm ended pres s u r e . I f p r e s s u r e i s i n e x c e s s o off r e c om men ded press ure, replace fuel pump assem bly. (e e)) D i s a s s e m b l e carburetor. Replac e worn m eterin g jet, usi ng a new jet of co rrec t size and type.
jet.
( a) a ) ( S e e o w n e r ' s Manual.)
(a)
Instruct
owner.
( a) a) C h o k e t h e r m o s t a t a d j u s t m e n t l e a n e r ( a a)) A d j u s t , than specified. ( b) b ) C h o k e t h e r m o s t a t c o r r o d e d s u c h that ( b ) R e p l a c e a s s e m b l y , it has c rac ked and distorted lean. (c) Ch ok e link age, shaf t or related p arts (c) Repair, c lea n or rep lac e, c o r r o d e d , b e n t o r d i r t y s u c h t h a t s y s t e m i s n o t en e n t i r e l y f r e e t o m o v e f ro m o p e n to to c l o s e d p o s i t i o n . (d) Ch ok e valv e imp rop erly se ate d. ( e ) A i r c l e a n e r i n t e r f e r s w i t h c h o k e s h a f t or linkage. i n t e r f e r s w i t h (f ) A i r c l e a n e r gas ket ch oke valve or linkage. (g ) S p r i n g s t a g i n g s p r i n g d i s t o r t e d or missing.
LOW EN GIN E
Correction
Possible Cau se
(d) Res eat valv e. (e) Rotate c lean er to co rrec t instruct owner, ( ff)) R e i n s t a l l g a s k e t p r o p e r l y .
positio n,
(g) Repl ac e or install new spr ing ,
( a) a) E n g i n e l u b r i c a t i n g o i l i n c o r r e c t v i s - ( a a)) R e c o m m e n d 5W-20. cosity. (b) Cho ke therm ost at adju stm ent inco r- (b) Ad jus t to co rrec t setting , rect, rich.
ENGINE RUN S LEAN , FIRST HALF MILE C H O K E L E A N
(a) Review items und er (Poo r Startin g).
(a a)) S e e " C h o k e V a l v e F a i l s t o C l o s e . "
(b b)) D i a p h r a g m
(b) Readju st to sp eci fic ation .
adju stm ent
lean.
ENGINE RUN S LEAN AFTER H ALF M ILE EN GIN E HEA T INSUFF ICIEN T
( a ) Heat v a l v e s t u c k o p e n . ((b b ) Heat v a l v e t h e r m o s t a t d i s t o r t e d .
(a a)) F r e e w i t h s o l v e n t . (b) Repl ac e therm ostat.
14-6
F U E L S Y ST E M — B B D Condition
Possible Cause
Correction
( c ) H e a t v a l v e f a i l e d w i t h i n e x h a u s t S e e ( c ) R e p l a c e h e a t v a l v e .
engine se ct ion for proper diag nos is. (d) Water temp erature s ub no rm al.
CARBURETOR MIXTURES LEAN
(d) Ch ec k thermostat.
(a) Repair. ( a) a) A i r l e a k b y p a s s i n g t h e c a r b u r e t o r . ( b ) C a r b u r e t o r h a s e c o n o m y m e t e r i n g ( b ) Inform c u s t o m e r . system.
ENGINE RUNS EXC ES S IVEL Y RICH AFTER COLD START CHOKE SYSTEM RICH
CARBURETOR RICH
( a) a) C h o k e t h e r m o s t a t a d j u s t m e n t r i c h e r than specified. ( b) b) C h o k e v a c u u m d i a p h r a g m i n o p e r a t i v e or misadjusted. ( c ) C h o k e v a c u u m p a s s a g e b l o c k e d or leaking. ( a) a ) I n c o r r e c t g a s k e t o r g a s k e t i n s t a l l a t i o n b e t w e e n c a r b u r e t o r a n d i n t ak ak e m a n i fold.
(a) Correct. ( b ) C o r r e c t o r r e p l a c e . (c) Correct.
(a)
R e p l a c e o r c o r r e c t .
EXC ES S IVE S T AL L S AFTER COLD START CHOKE SYSTEM LEAN
( a) a) R e v i e w i t e m s u n d e r " P o o r S t a r t i n g C h o k e V a l v e F a i l s t o C l o s e . " ( b ) C h o k e v a c u u m d i a p h r a g m a d j u s t m e n t (b ) A d j u s t t o S p e c i f i c a t i o n , lean.
ENGINE OUTPUT L O W
( a ) F a s t i d l e s p e e d l o w . ( b ) F a s t i d l e c a m p o s i t i o n a d j u s t m e n t incorrect. ( c ) E n g i n e l u b r i c a t i o n o i l o f i n c o r r e c t viscosity. ( d ) In In c o r r e c t t i m i n g .
(a ) A d j u s t t o S p e c i f i c a t i o n . (b ) A d j u s t t o S p e c i f i c a t i o n ,
( a ) C u r b i d l e s e t v e r y l e a n . ( b ) A i r l e a k b y p a s s i n g t h e c a r b u r e t o r .
(a ) A d j u s t . (b ) R e p a i r .
CARBURETOR LEAN
B B D S E R I E S C A R B U R E T O R S
(c ) R e c o m m e n d e d
5 WW - 20 20 .
(d ) R e s e t t i m i n g .
(W*)
INDEX A u t o m a t i c C h o k e ( w el el l t y p e e)) C a rb u r et o r A d j u s t m e n t s A c c e l e r a t o r P u m p a n d B o w l V e n t C h o k e U n l o a d e r (Wide O p e n K i c k ) C h o k e V a c u u m K i c k F a s t I d l e C a m P o s i t i o n . F a s t I d l e S p e e d (O n V e h i c l e )
Page 1 . . . . . . 11 11-13 12 12 11 14
Page I d lle e S p e e d A d j u s t m e n t 13 C l e a n i n g C a r b u r e t o r P a r t s 1 C l o s e d C r a n k c a s e V e n t S y s t e m . . . ( E n g i n e G r o u p ) D i s a s s e m b l i n g C a r b u r e t o r 7 Inspection and Reassem bly 9 S p e c i f i c a t i o n s s . . . . 65
GENERAL INFORMATION T h e B a l l a n d B a l l d u a l t h r o a t 1 - 1 //2 2 in ch C arb ur eto r
i d l e . T h i s c o n d i t i o n i s t h e r e s u l t o f e x c e s s i v e h e a t a n d
M o d e l C . A . S . ( C l e a n e r A i r S y s t e m ) B B D - 4 7 2 5 S , B B D -
resultant overrich mixtu res. These three carburetors
4 7 2 6 S a n d B B D - 4 8 9 4 S a r e u s e d o n t h e 383 c u . i n . E n
a r e a l s o e q u i p p e d w i t h a d i s t r i b u t o r g r o u n d s w i t c h ,
g i n e s w h e n t h e v e h i c l e s a r e e q u i p p e d w i t h m a n u a l o r
w h i c h r e t a r d s t h e d i s t r i b u t o r w h e n t h e c a r b u r e t o r i s
automatic
at cur b idle, for better emis sion contro l.
transmis sions respectively
( F i g . 1) . B B D -
4 7 2 6 S i s u s e d o n l y o n v e h i c l e s w i t h o u t a i r c o n d i t i o n i n g w h i l e B B D - 4 8 9 4 S i s u s e d o n l y o n v e h i c l e s w i t h a i r
T h e B a l l a n d B a l l d u a l t h r o a t 1 - 1 /2 /2 i n c h c a r b u r e t o r m o d e l s E . C . S . ( E v a p o r a t i o n
Control
S y s t e m ) B B D -
c o n d i t i o n i n g . T h i s c a r b u r e t o r i s e q u i p p e d w i t h a h o t
4727S and BB D-4728S a arr e u s e d o n t h e 3 8 83 3 c u . i n . e n
i d l e c o m p e n s a t o r v a l v e , w h i c h i s a t h e r m o s t a t i c a l l y
g i n e s w h e n t h e v e h i c l e s a r e e q u i p p e d w i t h m a n u a l
o p e r a t e d a i r b l e e d , t o r e l i e v e a n o v e r r i c h c o n d i t i o n a t
a n d a u t o m a t i c t r a n s m i s s i o n s r e s p e c t i v e l y ((F F i g . 2) 2) . B o t h
A
B B D —FUEL SYSTEM Th e B all an d
o f t h e s e c a r b u r e t o r s a r e e q u i p p e d w i t h a h o t i d l e c o m
B
a
l
T
m
^
d
o
14-7 w
n
-
operated
d r a f t t y p e . E a c h t h r o a t h a s i t s o w n t h r o t t l e v a l v e , a n d
a i r b l e e d t o r e l i e v e a n o v e r r i c h c o n d i t i o n a t i d l e . T h i s
m a i n m e t e r i n g s y s t e m s a n d a r e s u p p l e m e n t e d b y t h e
c o n d i t i o n i s tth h e r e s u l t o f e x c e s s i v e h e a t a n d r e s u l t a n t
f lo a t , , ac a c c e l e r a t i n g , , i d l e a n d p o w e r s y s t e m s .
pensator
valve wh ic h is a therm ost atic ally
o v e r r i c h h m i x t u r e s .
These two
c arbur etors
O n e ac h B B D s e r i e s c a r b u r e t o r , t h e m o d e l n u m b e r
a r e a l s o
e q u i p p e d w i t h a d i s t r i b u t o r g r o u n d s w i t c h , w h i c h r e
i s s t a m p e d o n m e t a l t a g a t t a c h e d t o a i r h o r n . D o
tards the distributor w hen the carb ure tor is at cu rb idle, for b etter em issio n con trol.
rem ov e or destro y thi s tag , as it is the onl y mea ns provided for carbu retor mod el ide en n t i f i c at i o n . B e f o r e
S i n c e t h e
serv ic e pro ced ures are
ident ic al
on
all
not
attemp ting to rep air or ov erh aul car bure tor, ref er to
B B D c a r b u r e t o r s , t h e i l l u s t r a t i o n s s h o w i n g t h e v a r i
mod el num ber
a n d s e c u r e a r e p a i r
o u s d i s a s s e m b l y p r o c e d u r e s w i l l n o t a l w a y s s h o w a n y
indi cated on tag.
kit for
n um ber
one specific carbur etor.
S ERVIC E DISASSEMBLING CA RBURETOR (1 ) I n s e r t
three
To ol T-109-287S
1 0 9 -2 -2 8 8 S e l e v a t i n g
legs thr oug h
PROC EDU RES
Figs. 1 or 2.)
and
one
Too l
T-
c a r b u r e t o r t h r o t t l e
t l e b o d y f i t t i n g a n d v a c u u m d i a p h r a g m . ( 5) 5 ) R e m o v e c l i p f r o m c h o k e o p e r a t i n g l i n k a n d d i s e n g a g e l i n k f r o m d i a p h r a g m p l u n g e r a n d c h o k e l e v e r . ( F i g s . 1 o r 2 ) .
pro tec t
(6 ) R e m o v e v a c u u m d i a p h r a g m a n d b r a c k e t a s s e m
t h r o t t l e v a l v e s f r o m d a m a g e a n d t o p r o v i d e a s u i t a b l e
b l y a n d p l a c e t o o n e s i d e , t o b e c l e a n e d a s a s p e c i a l
b a s e f o r w o r k i n g . ) (2 ) R e m o v e h a i r p i n
i t e m . A liquid cleaner cleaner m a y
body
s tu d
holes . (These
tools
c lip
and
are
u se d to
diseng age fast
id le
material. (7)
c o n n e c t o r r o d f r o m f a s t i d l e c a m a n d c h o k e l e v e r . (3 ) R e m o v e h a i r p i n c l i p a n d d i s e n g a g e a c c e l e r a t o r
damage
the
diaphrag m
R e m o v e s c r e w s that a t t a c h h o t i d l e c o m p e n s a t o r
v a l v e e c o v e r t o m a i n b o d y . R e m o v e c o v e r a n d l i f t o u t h o t i d l e c o m p e n s a t o r v a l v e a n d g a s k e t ( F i g . 3 ))..
r o d f r o m t h r o t t l e l e v e r a n d p u m p r o c k e r a r m . (4 ) R e m o v e v a c u u m h o s e b e t w e e n c a r b u r e t o r t h r o t
( 8 ) R e m o v e a i r h o r n r e t a i n i n g s c r e w s a n d l i f t a i r
ACCELERATOR PUMP ROCKER ARM ACCELERATOR BOWL VENT VALVE
P
U
M
DISTRIBUTOR GROUND SWITCH TERMINAL
P
CHOKE CHOKE
AIR
FAST IDLE CONNECTOR ROD
HORN
LEVER CHOKE
OPERATING LINK
VALVE
DIAPHRAGM STEM CURB IDLE SPEED ADJUSTING SCREW CHOK E VACU UM DIAPHRAGM
FUE L INLE T NEEDLE, VAL VE, SEAT f A N D G A S K E T f
CHOKE V ACUUM ' HOSE
' MAIN BODY
IDLE LIMITE R CAP ( 2) ( I D LE LE M I X T U R E A D J U S T I N G SCREWS 2)
* * ^
t
FAST IDLE
CAM THROTTLE UNLOADER ACCELERATOR ROD
LEVER
CLOSED
IDLE LIMITE R CAP ( 2) ( I DL DL E M I X T U R E A D J U S T I N G
CRANKCASE
VENT TUBE FITTING
SCREWS 2) DISTRIBUTOR VACUUM ADVANCE TUBE FITTING
TANG
PUMP
F i g . f - C a r b u r e t o r Assembl y
PY498
(B B B -1-1/2
inch) C . A . S .
1 4 -8
FU EL
S Y S T E M —B B D
CHOKE VALVE FAST IDLE SPEED ADJUSTING SCREW
•A
BOWL VENT VALVE COVER CHOKE
ACCELERATOR PUMP R O C K E R ARM
OPERATING LINK
CHOKE VALVE
BOWL VENT VALVE VENT TUBE FITTING
ACCELERATOR ARM
BOWL VENT VALVE COVER
PUMP
FAST IDLE C O N N E C T O R ROD
BOW L VENT VALVE VENT TUBE
DISTRIBUTOR AIR
^ j ; SWITCH
HORN
TERMINAL
CHOKE LEVER CURB IDLE SPEED ADJUSTING SCREW
MAIN
ground
BODY
FU EL INLET— * '* NEEDLE, VALVE, SEAT AND GASKET
A I R C LE A NE R TO CARBURETOR VACUUM TUBE FITTING
FAST IDLE CAM
IDLE LIMITE R CAP (2) (2) ( I DL DL E M I X T U R E A D J U S T I N G S C R E W S 2) DISTRIBUTOR VACUUM ADVANCE TUBE FITTING
CLOSED CRANKCASE VENT TUBE FITTING
THROTTLE BODY
CHOKE VACUUM DIAPHRAGM
F i g . 2 — C a r b u r e t o r Asset
THROTTLE LEVER UNLOADER
ACCELERATOR ROD
TANG
PUMP PY499
y ( B B D 1-1/2 inch) F.C.S.
h o r n s t r a i g h t u p a n d a w a y f r o m m a i n b o d y . D i s c a r d
g a s o l i n e o r k e r o s e n e t o p r e v e n t l e a t h e r f r o m d r y i n g
g a s k e t (2 s c r e w s r e c e s s e d ) .
out.
(9) D i s e n g a g e a c c e l e r a t o r p u m p
p l u n g e r f r o m ac
c e l e r a t o r p u m p a r m b y p u s h i n g u p o n b o t t o m o f
p l u n g e r a n d s l i d i n g p l u n g e r o u t
plung er
s h a f t of f h o o k . S l i d e
o f a i r h o r n an d r e m o v e
compression
s p r i n g an d s e a t . R e m o v e b o w l v e n t v a l v e c o v e r .
I f o l d p l u n g e r c a n b e u s e d a g a i n or i f a new p l u n g e r i s to be i n s t a l l e d , p l a c e p l u n g e r i n a j a r o f c l e a n
( 10 10 ) R e m o v e f u e l i n l e t n e e d l e v a l v e , s e a t a n d g a s k e t f r o m m a i n b o d y .
( 11 1 1 ) L i f t o u t float f u l c r u m p i n r e t a i n e r , a n d l i f t o u t f llo o at at s a n d f u l c r u m p i n . ( 12 1 2 ) R e m o v e s t e p - u p p i s t o n an d r e t a i n i n g s c r e w a n d s l i d e s t e p - u p p i s t o n an d r o d s o u t o f w e l l , (Fi g. 4). L i f t o u t s t e p - u p p i s t o n s p r i n g . R e m o v e s t e p - u p p i s t o n g a s k e t f r o m bo bo t t o m of w e l l .
(1 13 3 ) R e m o v e m a i n m e t e r i n g j e t s ( F i g . 5). ( 1 4) 4 ) R e m o v e v e n t u r i c l u s t e r s c r e w s , t h e n l i f t v e n t u r i c l u s t e r a n d g a s k e t s u p a an n d a w a y f r o m m a i n b o d y ,
( F i g . 6) . D i s c a r d g a s k e t s . Do not remove idle orifice
PY500
F i g . 3 — R e m o v i n g or Installing Hot Idle Compensator Valve
Step-Up F i g . 4 — R e m o v i n g or Installing Step-Up
Piston
A-
- B B D — F U E L S Y S T E M VENTURI CLUSTER SCREWS -VENTURI
SPECIAL TOO ,
14-9
VENTURICtOSTER CAP
CLUSTER GASKET
3 » r it tj
M E T EMAIN R I NG JE T-~S ACCELERATOR PUMP DISCHARGE GASKET
NR380 A
F i g . 5 — R e m o v iin n g o r install ing Ma in Metering
Jets
tubes o r m a i n vent tubes from cluster. T h e y c an be
ACCELERATOR PUMP DISCHARGE CHECK BALL
c l e a n e d i n a s o l v e n t a n d d r i e d w i t h c o m p r e s s e d a i r .
(1 15 5) Inver t pum p
ch ec k
ball.
( T h e i n t a k e c h e c k b a l l i s t h e l a r g e s t . ) (16)
F i g . 6 — R e m o v i n g or Installin g Venturi
c a r b u r e t o r an d d r o p o u t a c c e l e r a t o r
d i s c h a r g e c h e c k b a l l a n d i n t a k e R e m o v e s c r e w s t h a t
NR381
Cluster
v a l v e s i s t o b e i n s t a l l e d , a d h e r e t o t h e f o l l o w i n g i n structions:
a t t a c h t h r o t t l e b o d y t o
m a i n b o d y . S e p a r a t e t h e b o d i e s a n d d i s c a r d g a s k e t .
(2 ) M a r k p o s i t i o n of t h r o t t l e v a l v e s i n b o r e s . (3)
(1 7 7)) R e m o v e p l a s t i c l i m i t e r c a p s f r o m i d l e ai r m i x t u r e s c r e w s . (B e s u r e an d c o u n t n u m b e r of t u r n s t o s e a t t h e s c r e w s , a s t h e s a m e n u m b e r of t u r n s ( f r o m
and
R e m o v e s c r e w s t h a t h o l d t h r o t t l e v a l v e s t o s h a f t slide
v a l v e s out
o f b o r e s . These
screws
are
s t a k e d on the o p p o s i t e s i d e a n d c a r e s h o u l d be u s e d at r e m o v a l so as n o t to b r e a k o ffff in t h e s h a f t .
t h e s e a t ) m u s t b e m a i n t a i n e d at i n s t a l l a t i o n . ) R e m o v e
R e m o v e t h e s t a k e d e n d o f t h e s c r e w s w i t h a file.
s c r e w s an d s p r i n g s f r o m t h r o t t l e b o d y .
( 4 ) S l i d e t h r o t t l e s h a f t a n d l e v e r o u t of of b o d y .
T h e c a r b u r e t o r n o w h a s b e e n
disas sem bled
t h r e e s u b - a s s e m b l i e s , t h e a i r h o r n , m a i n
into
b o d y and
t h r o t t l e b o d y a n d t h e c o m p o n e n t s of e a c h d i s a s s e m
b l e d as f ar a s n e c e s s a r y f o r c l e a n i n g a n d i n s p e c t i o n . I t i s u s u a l l y n o t a d v i s a b l e t o r e m o v e t h e t h r o t t l e
s h a f t o r v a l v e s f r o m t h e t h r o t t l e b o d y , u n l e s s w e a r o r
d a m a g e n e c e s s i t a t e s t h e i n s t a l l a t i o n o f n e w p a r t s . T h e r e i s a b o u t .005 i n c h
c l e a r a n c e b e t w e e n the
(5)
I n s t a l l n e w t h r o t t l e s h a f t a n d l e v e r .
(6)
I n s t a l l t h r o t t l e v a l v e s i n t h e i r r e s p e c t i v e b o r e s
( w i t h v a l v e
num bers
toward
m a n i f o l d ) . I n s t a l l new
s c r e w s b u t d o n o t t i g h t e n . H o l d v a l v e s i n p l a c e c l o s e d p o s i t i o n ) w i t h
f iin n ge g e rs rs
(fully
p r e s s i n g o n h i g h s i d e s
o f v a l v e s . Ta p v a l v e s li l i g h t l y w i t h a s c r e w d r i v e r t o s e a t i n t h r o t t l e b o r e s . P a r t i a l l y t i g h t e n s c r e w s . H o l d u p t o a s t r o n g l i g h t t o c h e c k f o r a p r o p e r p o s i t i o n i n b o r e .
t h r o t t l e s h a f t a n d t h e t h r o t t l e s h a f t b o r e s i n t h e t h r o t
( T h e y m a y h a v e t o b e r o t a t e d s l i g h t l y a s t h e v a l v e s ar e
t l e b o d y . A n y c l e a r a n c e o v e r .010 i n c h , a new t h r o t t l e s h a f t a n d / o r t h r o t t l e b o d y s h o u l d b e i n s t a l l e d .
e l i p t i c a l .) .) W h e n p r o p e r l y p o s i t i o n e d t i g h t e n s c r e w s s e c u r e l y an d s t a k e , u s i n g p l i e r s .
INSPECTION AND Throttle (1)
REASSEMB LY,.
( 7 ) I n s t a l l i d l e m i x t u r e s c r e w s a n d s p r i n g s i n b o d y . ( T h e t a p e r e d p o r t i o n m u s t b e s t r a i g h t a n d s m o o t h . If t a p e r e d p o r t i o n i s g r o o v e d o r r i d g e d , a new i d l e m i x
Body
I n s p e c t t h e t h r o t t l e s h a f t a n d t h r o t t l e b o d y f o r
e x c e s s i v e w e a r . I f e i t h e r o r b o t h ar e w o r n t o t h e p o i n t
w h e r e t h e c a r b u r e t o r o p e r a t i o n w i l l b e a f f e c t e d , r e p l a c e a s r e q u i r e d .
D u r i n g m a n u f a c t u r e , t h e l o c a t i o n o f t h e i d l e t r a n s f e r p o r t a n d t h e s p a r k a d v a n c e c o n t r o l p o r t s to the t h r o t t l e v a l v e , i s c a r e f u l l y e s t a b l i s h e d f o r o n e p a r t i c u
l a r a s s e m b l y , (Fi g . 7).
t u r e s c r e w s h o u l d b e i n s t a l l e d t o i n s u r e h a v i n g c o r r e c t i d l e m i x t u r e
c o n t r o l . ) DO NOT USE A SCREW
D R I V E R . T u r n s c r e w s l i g h t l y a g a i n s t t h e i r s e a t s w i t h I D L E
TRANSFER PORTS
r - -
• /
SPARK ADVANCE
V
PORT
w •
I f a ne w s h a f t s h o u l d b e i n s t a l l e d i n a n o l d , w o r n t h r o t t l e b o d y , i t w o u l d b e v e r y u n l i k e l y t h a t t h e o r i g i
n a l r e l a t i o n s h i p o f t h e p o r t s t o t h e v a l v e s w o u l d b e o b t a i n ed e d . C h a n g i n g t h e r e l a t i o n s h i p o f t h e v a l v e s t o t h e p o r t s w o u l d a d v e r s e l y a f f ec ec t n o r m a l c a r o p e r a t i o n b e t w e e n t h e s p e e d s o f 15 an d 30 m i l e s p e r h o u r . I f i t h a s b e e n d e t e r m i n e d ,
h o w e v e r , t h a t a ne w s h a f t o r
0
:
' T HR OT T LLEE V A I V F S F i g . 7 — P o r ttss in R e l at i o n to Throttle
NR 3B2 3B2
Va lves
;
FUEL S Y S T E M — B U D *
14-10
f in g e r s . B a c k o ffff t h e n u m b e r o f t u r n s c o u n t e d a t d i s
,
A
(7 ) B e f o r e i n s t a l l i n g s t e p - u p p i s t o n , b e s u r e s t e p - u p
against
r o d s are ab le to m o v e freely , eac h s id e o f th e v ert ic al
s t o p . T h i s s c r e w h a s a l e f t h a n d t h r e a d . T u r n c o u n t e r
p o s i t i o n , ( F i g . 9 )).. ( T h e s t e p - u p r o d s m u s t b e s t r a i g h t ,
c l o c k w i s e ( R i c h e r ) a n d c l o c k w i s e (Leaner).
s m o o t h a n d f r e e tto o m o v e f o r w a r d a n d b a c k w a r d from
a s s e m b l y . I n s t a l l n e w
p l a s t i c c a p s w i t h t a b s
vertical.)
M ai n
( 8) 8)
Body
(1 ) I n v e r t m a i n b o d y a n d p l a c e a n e w p o s i t i o n a n d p l a c e t h r o t t l e b o d y o n m a i n
gas ket in body and
(2 ) I n s t a l l a c c e l e r a t o r p u m p d i s c h a r g e c h e c k b a l l i n d i s c h a r g e p a s s a g e a n d c h e c k a c c e l e r a t o r p u m p s y s
tem ; fuel inlet and dis ch arg e ch ec k balls as follow s: (3 ) P o u r
cle an gasolin e into
proxim ately f r o m j a r
1/2
c arbu reto r
inc h deep. Rem ove
pum p
into
p r e s s l i g h t l y
pum p
an d
(4) U s i n g a s m a l l c l e a n b r a s s r o d , h o l d d i s c h a r g e c h e c k b a l l d o w n firmly o n i t s s e a t . A g a i n r a i s e p l u n g
shoul d be
emitted
f r o m e i t h e r i n t a k e o r d i s c h a r g e p a s s a g e , ( F i g . 8 ) . I f a n y f u e l d o e s e m i t f r o m e i t h e r p a s s a g e , i t i n d i
c a t e s t h e p r e s e n c e o f d i r t o r
a dam aged
c hec k
ball
s e a t . C h e c k t h e p a s s a g e a g a i n a n d r e p e a t t e s t . I f l e a k
a g e i s s t i l l ev ev i d e n t , i n s t a l l a n e w c h e c k b a l l . T h e f u e l i n l e t c h e c k b a l l i s l o c a t e d a t t h e b o t t o m o f t h e p l u n g e r well.
(5 ) I n s t a l l n e w
gask ets on vent uri
clu ster, and in
s t a l l i n p o s i t i o n i n m a i n b o d y . I n s t a l l c l u s t e r s c r e w s
a n d t i g h t e n s e c u r e l y . T e s t p u m p d i s c h a r g e b y p r e ss ing
pum p
s h o u l d b e
plun ger
dow n. Tw o
f iin ne
f o r c e d f r o m c l u s t e r . I f
restricted or
diverted,
remo ve
stream s of either
f uel
str eam
is
clu ster and rec lean .
A f t e r t e s t , p o u r f u e l f r o m t h e b o w l a n d r e m o v e p u m p plunger. (6 ) I n s t a l l
m ain
m eteri ng
jets. Tig hte n
step-up piston
sp rin g,
s t e p - u p p i s t o n a n d r o d s . C a r e f u l l y g u i d e s t e p -u -u p r o d s
main
s c r e w a n d
m eterin g tighten
jet s
((F Fig.
4 ))..
Install
retain ing
s ecu rely. Ch ec k piston
for
free
operation in w ell. A s t e p - u p p i s t o n s t u c k i n t h e U p p o s i t i o n w i l l c a u s e
i n t h e Down p o s i t i o n w i l l c a u s e a l e a n m i x t u r e a t w i d e
p u m p p a s s a g e .
fuel
the
in
plung er
c y l i n d e r . R a i s e p l u n g e r
No
install
pos ition
a r i c h m i x t u r e a t p a r t t h r o t t l e , w h e r e a s a p i s t o n s t u c k
o n p l u n g e r s h a f t to t o e x p e l a l l a i r f r o m
e r a n d p r e s s d o w n w a r d .
well , then
int o
ap
bowl,
o f g a s o l i n e , f le le x l e a t h e r s e v e r a l t i m e s , t h e n
s l i d e d o w n
piston into
a l i g n . I n s t a l l s c r e w s a n d t i g h t e n s e c u r e l y .
Slide step-pis ton gas ket do wn
sec urel y.
( F i g . 5).
o p e n t h r o t t l e a n d p o o r a c c e l e r a t i o n .
Measuring
Float
Setting
T h e c a r b u r e t o r s a r e e q u i p p e d w i t h a
fu el inlet needle. Th e ru bb er tip is m ake
a g o o d s e a l o n
i n c r e a s e d r e s i s t a n c e t o
to perf orm
the
need le
rub ber-tipped
f lle e x iib b lle e eno ug h to seat, and
to
giv e
f llo o od o d iin n g. g. C a r e s h o u l d b e t a k e n
this operation ac cu rately in order to se
c u r e t h e b e s t p e r f o r m a n c e a n d f u e l e c o n o m y .
( 1) 1) T o c o r r e c t l y s e t float h e i g h t w h e n c a r b u r e t o r i s b e i n g o v e r h a u l e d , i n s t a l l f lo l o at at s w i t h f u l c r u m p i n a n d pin retainer in main body. ( 2) 2) I n s t a l l r u b b e r - t i p p e d n e e d l e , s e a t a n d g a s k e t i n body and tighten secur ely. ( 3) 3) I n v e r t
m ain
bod y
s o t h a t w e i g h t
i s f o r c i n g n e e d l e a g a i n s t s e a t . H o l d
o f float o n l y
f iin n g er er
again st re
tainer to full y seat fu lc ru m p in. ( 4 ) U s i n g T o o l T -1 -1 0 9 - 2 28 80
o r a " T " s c a l e , m e a s u r e
float, ( F i g . 1 0 )).. T h e r e s h o u l d b e 5 / 1 6 i n c h f r o m s u r f a c e o f f u e l b o w l t o c r o w n of o f e a c h float a t c e n t e r . If
an adju stm ent
i s n e c e s s a r y , h o l d
the
floa att s
on
b o t t o m o f t h e b o w l a n d b e n d float l i p t o w a r d o r a w a y f r o m n e e d l e . R e c h e c k t h e 5 / 1 6 i n c h s e t t i n g a g a i n a n d
repeat the lip bend ing op eration as requ ired .
C A U T I O N : W h e n b e n d i n g th e f l o at l i p , d o n o t al l o w the lip to push against the needle as the synethetic rubber tip can be compressed sufficiently to cause a false setting which will affect correct level of fuel in the bowl.
STEP-UP RODS M UST M OV E FREELY
F i g. 3—Testing Accelerator
Discharge
Pum p Intake Check Balls
and
NK617
F i g. 9 — S t e p - U p R o d s Freeplay
BBD—FUEL
A
S Y S T E M
14-11
I n s t a l l t h e d i a p h r a g m a s s e m b l y on the ^ h o f n ~ a s
F U L C R U M PIN
RETAINER IN
follows:
POSITI ON
( 1 ) A s s e m b l e d i a p h r a g m t o a i r h o r n a n d t i g h t e n a t t a c h i n g s c r e w s s e c u r e l y . ( 2 ) I n s t a l l c h o k e o p e r a t i n g l i n k i n p o s i t i o n b e t w e e n diaph ragm
plu nger
(s t e em m ) a n d c h o k e
lever .
In stall
c l i p t o s e c u r e .
(3 3)) I n s p e c t r u b b e r h o s e f o r c r a c k s b e f o r e p l a c i n g i t o n c o r r e c t c a r b u r e t o r fitting. ( F i g . 1) 1).. D o no t c o n n e c t v a c u u m h o s e t o d i a p h r a g m fitting u n t i l a f t e r v a c u u m
R OAT GAU GF
N R 3 8 4
O N L Y W E I G H T OF F L OA T S A G A I NST INLET NEEDLE
Fig. I0—Checking Float Setting After
b e i n g c o m p r e s s e d , t h e t i p i s v e r y s l o w t o r e
C A U T I O N : It is v e r y i m p o r t a n t t h a t th e float lip be p e r p e n d i c u l a r to th e n e e d l e or s l a n t e d not m o r e t h a n t e n d e g r e e s a w a y f r o m th e n e e d l e w h e n t he float h e i g h t is c o r r e c t . Horn
( 1 ) T e s t f r e e n e s s o f c h o k e m e c h a n i s m i n a i r h o r n . T h e c h o k e s h af a f t m u s t float f r e e t o o p e r at at e c o r r e c t l y . If c h o k e
s h a f t s t i c k s i n b e a r i n g a r e a s , , o r a p p e a r s
t o b e g u m m e d f r o m d e p o s i t s i n a i r h o r n , a t h o r o u g h c l e a n i n g w i l l b e r e q u i r e d .
(2 ) R e m o v e
acceler ator pu mp
p l u n g e r f r o m g a s o
l i n e , s l i d e c o m p r e s s i o n s p r i n g a n d s p r i n g s e a t o v e r s h a f t . I n s t a l l a s s e m b l y i n a i r h o r n a n d e n g a g e w i t h a c c e l e r a t o r p u m p a r m .
( 3) 3) P l a c e a n e w g a s k e t o n m a i n b o d y , a n d i n s t a l l a i r h o r n . I n s t a l l a t t a c h i n g s c r e w s s a n d t i g h t e n
justments.)
CARBURETOR
c o v e r i t s o r i g i n a l s h a p e .
Air
k i c k a d j u s t m e n t h a s b e e n m a d e . (See C a r b u r e t o r A d
sec urely .
( W h e n i n s t a l l i n g a i r h o r n , b e s u r e l e a t h e r o n p l u n g
ADJUSTMENTS
It i s v e r y i m p o r t a n t that t h e f o l l o w i n g
adjustm ents
a r e m a d e o n a r e c o n d i t i o n e d c a r b u r e t o r a n d i n t h e s e q u e n c e l i s t e d :
A c c e l e r a t o r
Pump
( 1 ) B a c k of f i d l e
speed
a d j u s t i n g s c r e w .
Open
c h o k e v a l v e s o t h a t f a s t i d l e c a m a l l o w s t h r o t t l e v a l v e s t o b e c o m p l e t e l y s e a t e d i n b o r e s . B e s u r e t h a t p u m p c o n n e c t o r r o d i s i n s t a l l e d i n o u t e r
h o l e o f t h r o t t l e
lever.
(2 ) C l o s e t h r o t t l e v a l v e s t i g h t l y . M e a s u r e t h e d i s t a n c e b e t w e e n t o p o f a i r h o r n a n d e n d o f p l u n g e r s h a f t , ( F i g . 11). T h i s m e a s u r e m e n t s h o u l d b e 1 i n c h .
(3 ) T o a d j u s t rod
us ing
Too l
pump
travel, bend
pum p
T --1 1 0 9 -2 - 2 1 3, 3 , at l o w e r
operating
a n g l e o f r o d ,
un til c orr ect setting has been obtained.
Fast
Idle
Speed Speed
T h e f a s t i d l e
and Cam Cam Position engine speed adju stm ent
Adjustment s h o u ld be
e r d o e s n o t w r i n k l e o r f o l d b a c k . )
m a d e o n t h e v e h i c l e , as d e s c r i b e d i n t h e F a s t I d l e
( 4 ) E n g a g e a c c e l e r a t o r p u m p r o d w i t h p u m p r o c k e r a r m an d i n s t a l l l o o s e e n d i n o u t e r h o l e o f t h r o t t l e
S p e e d A d j u s t m e n t ( O n t h e V e h i c l e ) P a r a g r a p h . H o w -
l e v e r . IIn n s t a l l h a i r p i n c l i p t o s e c u r e ( F i g . 1).
( 5 ) E n g a g e f a s t i d l e c o n n e c t o r r o d ( l o o p a t to p ) i n In s t a l l r e t a i n f a s t i d l e c a m a n d i n s l o t t e d c h o k e l e v e r . In i n g c l i p s s t o s e c u r e . ( 6 ) I n s t a l l h o t i d l e c o m p e n s a t o r v a l v e g a s k e t i n p o s i t i o n i n r e c e s s i n m a i n b o d y , f o l l o w e d b y v a l v e . (Be s u r e
v a l v e i s p o s i t i o n e d w i t h l e g s t o w a r d o u t s i d e o f m a i n
b o d y . ) ( F i g . 3). P l a c e c o v e r o v e r o p e n i n g a n d i n s t a l l a t t a c h i n g s c r e w s . T i g h t e n s e c u r e l y . (If s o e q u i p p e d ) .
C h o k e V ac u u m
D i ap h r ag m
I n s p e c t t h e d i a p h r a g m
v a c u u m fitting t o b e s u r e
t h a t t h e p a s s a g e i s n o t p l u g g e d w i t h f o r e i g n
m aterial.
L e a k c h e c k t h e d i a p h r a g m t o d e t e r m i n e i f i t h a s i n
t e r n a l l e a k s . . T o d o t h i s , f i rrss t d e p r e s s t h e d i a p h r a g m s t e m , t h e n p l a c e a f i n g e r
o v e r t h e fitting t o s e a l l t h e
o p e n i n g . R e l e a s e t h e s t e m . I f t h e s t e m m o v e s
more
t h a n 1 /1 6 i n c h i n te n (1 (1 0) 0) s e c o n d s , , t h e l e a k a g e i s e x c e s s i v e a n d t h e a s s e m b l y m u s t b e r e p l a c e d .
fig. 1 1 —Che c king Accelerator
Pum p
Sett Setting ing
14 12
F U E L S Y S T E M — BBD
A
e v e r , , t h e F a s t I d l e C a m P o s i t i o n A d j u s t m e n t c a n b e
t e rrn n. A pp ly a vac uu m of 1 100 o r m o r e i n c h e s o f
m a d e o n t h e b e n c h . T h i s a d j u s t m e n t i s i m p o r t a n t
cury.
to
a s s u r e t h a t t h e speeds o f e a c h s t e p o f t h e c a m o c c u r
mer
(3 ) I n s e r t s p e c i f i e d d r i l l ( r e f e r t o S p e c i f i c a t i o n s ) b e
a t t h e p r o pe p e r t i m e d u r i n g e n g i n e w a r m - u p .
tw een
ch ok e valv e and
pee e d a d j u s t i n g s c r e w c o n t a c t i n g (1 ) W i t h f a s t i d l e s p s e c o n d h i g h e s t s p e e d s t e p o n f a s t i d l e c a m , , m o v e
Ap ply
s u f f i c i en en t c l o s i n g p r e s s u r e o n l e v e r t o w h i c h
chok e
rod
c h o k e v a l v e t o w a r d c l o s e d p o s i t i o n w i t h l i g h t p r e s s u r e o n choke s h a f t l e v e r .
(2 ) I n s e r t s p e c i f i e d d r i l l ( s e e e s p e c i f i c a t i o n s )
be
t w e e n c h o k e valve a n d w a l l o f a i r h o r n . A n a d j u s t m e n t w i l l b e n e c e s s a r y i f a s l i g h t d r a g i s n o t o b t a i n e d a s d r i l l i s b e i n g r e m o v e d .
( 3 ) I f a n a d j u s t m e n t i s n e c e s s a r y , b e n d f a s t i d l e c o n n e c t o r r o d a t l o w e r a n g l e , u s i n g T o o l T 10 10 9 - 2 1 3 , u n t i l 12 2 ). ). c o r r e c t t v a l v e o p e n i n g h a s b e e n o b t a i n e d ( F i g . 1 V a c u u m K i c k A d j u s t m e n t — Th is test can be ma de ON or OF F vehicle. The chok e diaphrag m adjust ment controls the fuel deliv ery whil e the engin e is ru nn ing . It positions the c h o k e e v a l v e w i t h i n t h e a i r h o r n b y a c t i o n o f t h e l i n k age betw een the ch oke shaft and the diaph ragm . Th e diaph ragm m ust be energized to measur e the vac uu m kic k adjustm ent. Us e either a dist ribu tor test m ach ine w i t h a
v a c u u m s o u r c e , o r
vac uu m supp lied by
the
vehicle.
(1 1)) I f a d j u s t m e n t i s t o b e m a d e w i t h e n g i n e r u n o allow c hok e to n i n g , , d i s c o n n e c t f a s t i d l e l i n k a g e tto c l o s e t o t h e k i c k p o s i t i o n w i t h e n g i n e a t c u r b i d l e . I f
a n a u x i l i a r y v a c u u m s o u r c e i s t o b e u s e d , o p e n t h r o t tle
valves (engine not
run nin g)
an d mo ve
rs t , c l o s e d p o s i t i o n . R e l e a s e t h r o t t l e f i rs
th en
ch ok e
to
re le as e
choke.
(2 ) W h e n
u sing
an auxiliary
v a c u u m s o u r c e , d i s
c o n n e c t v a c u u m h o s e f r o m c a r b u r e t o r a n d c o n n e c t i t t o h o s e f r o m v a c u u m s u p p l y w i t h a s m a l l l e n g t h
of
t u b e t o a c t a s a fitting. R e m o v a l o f h o s e f r o m d i a ph rag m m ay require forces wh ic h damage the sys - DRILL OR G A U G E >CHOKE VALVE
attaches
to
wa ll
of
prov ide
without
v a l v e e o p e n i n g that t h e
Note
distortion cy lind ric al stem
air a
horn
( F i g . 1 3) 3) .
m in im um
ch oke
of diap hrag m link . of d i a p h r a g m wil l
e x t e n d a s i n t e r n a l s p r i n g iiss c o m p r e s s e d . T h i s s p r i n g must be fully c om press ed for prop er measu remen t of vac uum kic k adjustment. (4 ) A n a d j u s t m e n t w i l l b e n e c e s s a r y i f a s l i g h t d r a g i s n o t o b t a i n e d a s d r i l l i s b e i n g r e m o v e d . S h o r t e n o r
lengt hen diaph rag m link to obtain co rrec t ch oke open ing.
Leng th
changes should
be made
c arefully
by
b e n d i n g (o (o p e n o r c l o s i n g ) t h e b e n d p r o v i d e d i n d i a phragm
l i n k . C A U T I O N : D O
N O T A P P L Y T W I S T
I N G O R B E N D I N G F O R C E T O D I A P H R A G M . ( 5 ) R e i n s t a l l v a c u u m h o s e o n c o r r e c t c a r b u r e t o r fit ting. Retu rn fast idle linkag e to its orig inal c onditio n i f d i s t u r b e d a s s u g g e s t e d i n S t e p N o . 1. Wi t h n o v a c u u m a p p l i e d (6 ) Make f o l l o w i n g c h e c k . Wi t o d i a p h r a g m , t h e C H O K E V A L V E S H O U L D M O V E
F R E E L Y b e t w e e n o p e n a n d c l o s e d p o s i t i o n s . I f m o v e
men t
is not free, exam ine
linkage
for
m isalig nm ent
o r i n t e r f e r e n c e s c a u s e d b y b e n d i n g o p e r a t i o n . R e p e a t a d j u s t m e n t i f n e c e s s a r y t o p r o v i d e p r o p e r l i n k o p e r a tion.
Unlmaderr C h o k ee Unlmade
(Wi de
Open Open
K ick)
Th e cho ke unl oade r is a me ch ani ca l devic e to par t i a l l y o p e n t h e c h o k e v a l v e a t w i d e o p e n t h r o t t l e . I t i s u s e d t o e l i m i n a t e c h o k e e n r i c h m e n t d u r i n g c r a n k
i n g o f a n e n g i n e . E n g i n e s w h i c h h a v e b e e n
f llo o od o d ed ed
or
s t a l l e d b y e x c e s s i v e c h o k e e n r i c h m e n t c a n b e c l e a r e d C L O S I N G LIGHT C LIGHT
PRESSURE AG AI N ST CHOKE LEVER
DRILL OR G A U G E
CHOKE VALVE
BEND FAST IDLE C O N N E C T O R ROD AT A N G L E
- C H O K E OPERATING LINK
« < S y
LIGHT C L O S I N G PRESSURE LIGHT AG AI N ST CHOKE LEVER
F i g . 12—Fast 12—Fast Idle Ca m Posi Position tion
FAST IDLE SPEED ADJUSTING SCREW O N S E C O N D STEP A N D A G A I N S T FACE OF NEXT STEP O F FAST IDLE C A M PY502
Adju Adjustme stment nt
TO VACUUM SOURCE
DIAPHRAGM STEM RETRACTED APPLY 1 0 OR MORE INCHES O F VAC U U M ON DIAPHRAGM
PY503
F i g . 13—Checking Choke Vacuum Kick Setting (Wi de Open Open K ick)
14 -13
- B B D —F U E L SYSTEM by use of the unload er. Ad ju st the choke unload er as follows: ( 1 ) H o l d t h r o t t l e v a l v e s i n w i d e o p e n p o s i t i o n . I n s e r t s p e c i f i e d d r i l l ( s e e S p e c i f i c a t i o n s ) b e t w e e n u p p e r
edge of ch oke valve an d inn er wal l of air horn . (Fig. 14). With
(2 ) a f in in g er er l i g h t l y p r e s s i n g a g a i n s t s h a f t l e v e r , a s l i g h t d r a g s h o u l d b e f e l t a s d r i l l i s b e i n g w i t h d r a w n . I f a n a d j u s t m e n t i s n e c e s s a r y , b e n d u n l o a d e r t a n g o n t h r o t t l e l e v e r u n t i l c o r r e c t o p e n i n g h a s b e e n o b t a i n e d ( F i g . 1 5) . U s e T o o l T 1 0 9 - 2 1 4 .
Bowl Vent Adjustment
(EXS.)
( 1 ) O p e n c h o k e v a l v e s o that f a s t i d l e c a m a l l o w s
UNLOADER TANG ON THROTTLE LEVER —
v a l v e s t o c l o s e , ( c u r b i d l e ) .
( 2 ) B e s u r e that p u m p
op erating
rod
is in
long
s t r o k e h o l e i n t h r o t t l e l e v e r . R e m o v e b o w l v e n t v a l v e c o v e r i f n o t p r e v i o u s l y d o n e .
V x
(3 ) C l o s e t h r o t t l e v a l v e s t i g h t l y . U s i n g r u l e r , m e a s u r e t h e d i s t a n c e f r o m t o p
a
narrow
of bo wl
PY517
v ent
v a l v e r u b b e r t i p , t o t o p o f a i r h o r n c a s t i n g ( F i g . 16 1 6 )).. T h i s m e a s u r e m e n t s h o u l d b e 5 / 3 2 i n c h . ( 4 ) I f a n a d j u s t m e n t i s n e c e s s a r y , b e n d
SPECIAL TOOL
bowl ven t
Fig. 15—Bending C h o k e U n l o ad e r Measuring
Float
Setting Setting
(On
T an g
Vehicle)
l i f t a r m , u s i n g a s u i t a b l e t o o l , u n t i l c o r r e c t o p e n i n g
(1 ) R e m o v e h a i r p i n c l i p a n d d i s e n g a g e a c c e l e r a t o r
h a s b e e n o b t ai n e d . ( W A R N I N G : D O N O T B E N D B O W L
p u m p r o d f r o m t h r o t t l e l e v e r a n d p u m p r o c k e r a r m .
L E A F S P R I N G
V E N T V A L V E
O P E R A T I O N O R
DURING
B EN DING
I M P R O P E R V E N T V A L V E O P E R
A T I O N W I L L R E S U L T . ) I n s t a l l b o w l v e n t v a l v e c o v e r a n d s e c u r e w i t h a t t a c h i n g s c r e w s . (5) On C.A.S. carburetors, w i t h t h e t h r o t t l e v a l v e s c l o s e d , ( c u r b i d l e ) , t h e r e s h o u l d b e 1 / 1 6
inc h clear
at o n a i r h o r n a n c e b e t w e e n b o w l v e n t v a l v e a n d s e at 6)) . ( W h e n ( F i g . 1 6
me asu red
at at
outermo st
or
largest
d i m e n s i o n w i t h a d r i l l s h a n k ) .
D i s c o n n e c t a u t o m a t i c c h o k e r o d b y u n s n a p p i n g c l i p .
(2 ) R e m o v e
air
hor n
a t t a c h i n g s c r e w s a n d l i f t
a i r h o r n s t r a i g h t u p a n d a w a y f r o m m a i n b o d y . R e move gasket.
( 3 ) S e t float f u l c r u m p i n b y p r e s s i n g a f iinn ge ger a g a i n s t fu lc ru m pin retainer. Th er e shou ld be enough fuel in the bowl to raise f lo a t s s o t h a t t h e l i p b e a r s firmly a g a i n s t n e e d l e . A d d i t i o n a l f u e l m a y b e a d m i t t e d b y s l i g h t l y d e p r e s s i n g
( 6 ) I f a n a d j u s t m e n t i s n e c e s s a r y , b e n d v e n t v a l v e
BOWL VENT VA .VE LIFT LIFT ARM
l i f t e r a r m u n t i l c o r r e c t c l e a r a n c e h a s b e e n o b t a i n e d .
Idle Spee Speed d
Adjustment
(Curb
Idle)
R e f e r to t o G e n e r a l I n f o r m a t i o n a t F r o n t o f S e c t i o n .
CHOKE LEVER LIGHT CLOSING PRESSURE AGAINST CHO KE LEVER LEVER
/
B EN D U N LOA DER TA N G ON THROTTLE LEVER (FIGS. 1 OR 2) •DRILL OR GAUGE
V
S C A ALL E O R R U L E - ^ 3 g TOP EDG E OFv J* A IR IR H HO OR RN N X | H CA S TI N G
1
m BOWL VENT T I T v # * VALVE mJ^^m mJ^^mzz, zz, ^J^J±£*J S%> VENT VALVE LEAF SPRING^„ ' W * BOWL VENT .D RILL OR G A U G -E j* f 3 » - ~~M. S E A T ;
• CH OKE VA LVE
r
/
'THROTTLE-: B EN D
SHiF T^ W^ /.^ N
OR ^ f* ^ £ f c / « k AR M FFO
^ t ^ * - ^
J ?
F i g . 1 4 — C h e ck c k i n g C h o k e Unloader
PY504
Sett Setting ing
B OW L VENT* VENT*^ ^ A DJ U S TMEN T (CA .S .) CA RB U RETORS
HEL HELD D CLOSED IDL~ CURB
• v~ • V
Fig. 16 — Measuring Bow l Vent Va lve Fig. (C J L S ^ t X A )
PY518
Opening
14-14
F U E L S Y S T E M — H O L L E Y 2200
float. I f f u e l . , p r e s s u r e i n t h e l i n e is i n s u f f i c i e n t t o force a d d i t i o n a l
fuel
into bowl,
a d d
n e c e s s a r y f u e l
f r o m a c l e a n c o n t a i n e r . l d may be be h o t , if W A R N I N G : Since the m a n i f o ld , if is d a n
(4) W i t h o n l y p r e s s u r e f r o m b u o y a n t f llo o at at h o l d i n g l i p a g a i n s t i n l e t needle, c h e c k f l o oaa t t s e t t i n g , , u s i n g g T o o l be 5 / 1 6 i n c h T - 1 0 9 - 2 8 0 , or a " T " s c a l e . There s h o u l d be
from
s u r f a c e
o f
b o w l (gasket r e m o v e d
to c r o w n of
floats at center. t m e n t is n e c e s s a r y , h o l d t he floats on on th I f an a d j u s tm th e b o t t o m of t h e b o w l , t h e n b e n d the float l i p t o w a r d or a w a y f r o m
t h e needle.
the 5 /16 i n c h h s e t t i n g R e c h e c k the
a g a i n , t h e n repeat the l ip b e n d i n g , o p e r a t i o n as re quired. W hen
b e n d i n g t h e float lip , do n o t a l l o w the
l i p t o push a g a i n s t the needle as the r u b b e r t i p c an be compressed s u f f i c i e n t l y t® cause a f a l s e s e t t i n g w h i c h
w i l l a f f e c t c o r r e c t level of f u e l
in
t h e
b o w l ,
After
b e i n g compressed, the rubber tip is very slow to re cover its original shape. It is very important that the float lip be perpendicular to the needle or slanted not more than 10 d e g r e e s sway from the needle when the float is set correctly.
(5)
A f t e r float h as b e e n c o r r e c t l y s e t , r e a s s e m b l e
t h e ai r h o r n .
FAST IDLE SPEED ADJUSTING SCREW ON SECON D HI HIGHES GHEST T STEP OF CAM
Fig. 17-Fast
PY505
Idle Spee Speed d Adjustme Adjustment nt
(On
Vehicle)
s e t t h e c u r b i d l e s p e e d a n d m i x t u r e , t h e n p r o c e e d a s
follows: (1 ) W i t h e n g i n e of f and t r a n s m i s s i o n i n P A R K o r N E U T R A L p o s i t i o n , o p e n t h r o t t l e s l i g h t l y .
(2 ) C l o s e c h o k e v a l v e u n t i l f a s t i d l e s c r e w c an be p o s i t i o n e d o n s e c o n d h i g h e s t - s p e e d s t e p of f a s t
idl e
c a m ( F i g . 17).
( 3) 3) S t a r t
e n g i n e a n d d e t e r m i n e
stabilized speed .
T u r n f a s t i d l e s p e e d s c r e w i n o r o u t t o s e c u r e s p e c i fied s p e e d . ( S e e S p e c i f i c a t i o n s . )
Fast
Idle
Spee Speed d
F a s t i d l e
Adjust me ment nt
engine
(On
Vehicle)
(4 ) S t o p p i n g
s p e e d i s u s e d t o o v e r c o m e
engine
betw een
a d j u s t m e n t s is not
c old
n e c e s s a r y . H o w e v e r , r e p o s i t i o n f a s t i d l e s p e e d s c r e w
e n g i n e f r i c t i o n , s t a l l s a f t e r c o l d s t a r t s a n d s t a l l s b e
o n c a m a f t e r e a c h s p e e d a d j u s t m e n t t o p r o v i d e c o r r e c t
c a u s e of c a r b u r e t o r
t h r o t t l e c l o s i n g t o r q u e .
i c i n g . Se t t h i s
adjustm ent
after
t h e v e h i c l e o d o m e t e r i n d i c a t e s o v e r 500 m i l e s t o i n s u r e a n o r m a l e n g i n e
frictio n
level. Pre par e
eng ine
T o s e t t h e i d l e s p e e d o n v e h i c l e s , r e f e r t o F u e l S y s t e m G e n e r a l I n f o r m a t i o n
Paragr aph.
b y d r i v i n g at l e a s t 5 m i l e s . C o n n e c t a t a c h o m e t e r a n d
H O L L E Y 2200 S E R I ES ES
CARBURETOR Page
Page
C a r b u r e t o r Ad ju s t m e n t s A c c e l e r a t o r P u m p B o w l V e n t C h o k e U n l o a d e r (Wide O p e en n Kick) . . . . . . . .... F a s t I d l e S p e e d and Cam P o s i t i o n . . . . F a s t I d l e S p e e d (On V e h i c l e ) . . . . . . . . . . . . . . . . I d l e S p e e d . .
G E N E R A L
24 25 25 25 24 26 26
V a c u u m K i c k C a r b u re t o r S y s t e m s C l e a n i n g C a r b u r e t o r P a r t s D i s a s s e m b l i n g C ar bu r e ett o r . . . . . . . . — G e n e r a l I n f o r m a t i o n — . . . . . . . . . . . . . I n s p e c t i o n an d R e a s s e m b l y S p e c i f i c a t i o n s
24 14 21 18 14 21 66
INFORMATION
T h e H o l l e y d u a l t h r o a t , 2200 s e r i e s c a r b u r e t o r m o d e l C . A . S . (Cleaner A i r System) R - 4 3 7 1 A , (Fi g. 1) i s
E a c h t h r o a t o f t h e c a r b u r e t o r h a s i t s o w n t h r o t t l e
v a l v e an d m a i n
m etering
s y s t e m s a n d a r e s u p p l e
38 3 c u . i n. e n g i n e w h e n t h e v e h i c l e s ar e u s e d on the 38
m e n t e d b y t h e f llo o at at , a c c e l e r a t i n g , i d l e an d p o w e r s y s
e q u i p p e d w i t h a n a u t o m a t i c t r a n s m i s s i o n a n d w i t h o u t
tems.
a i r c o n d i t i o n i n g o n l y . T h i s c a r b u r e t o r i s e q u i p p e d w i t h a d i s t r i b u t o r
groun d
s w i t c h , w h i c h r e t a r d s t h e d i s
t r i b u t o r w h e n t h e c a r b u r e t o r i s at c u r b i d l e , r e s u l t i n g in better emis sio n con trol.
CARBURETOR Th e
carb ureto r
SYSTEMS u t i l i zze es
f o u r b a s i c f u e l
met ering
H O L L E Y 2200—FUEL S Y S T E M
A
ACCELERA TOR
P U M P R O C K E R ARM
ACCELERATOR
CHOKE OPERATING LEVER
P U M P ROD
F A S T IDLE C O N N E C T O R ROD /
B O W L V E N T V A L V E O P E R A T I N G L E V ER ER
F A S T IDLE S P EE E E D A D J U S T I N G SCREW
F A S T I D L E C O N N E C T O R ROD
C R A N K C A S E YEN
A R B U R E T O R AIR CLEANER VENT TUBE
T U B E FITTING
C HOKE: HOKE: V A L V E 1
_
\
CURS IDLE SPEED A D J U S T I N G S C R E W S
F A S T I D L E CAM
J
14-15
FITTING
C HDOI KA EP H VR AA CG U MU* M
CHOKE
OPERATING LINK
CHOKE LEVER DISTRIBUTOR V A CU CU U M A D V A N C E - ^ . TUBE FITTING - ChO,<£
CRANKCASE
VENT
TUBE FITTING DISTRIBUTOR
GROUND SWITCH CONTACT
L O N G AIR HORN SCREW
C A R B U R E T O R AIR CLEANER VENT TUBE FITTING
ACCELERATOR PUMP SHAFT
CURB IDLE
E L E V A T O R L E G S (4) 1
BOW V ALL VVEE N T ACCELERATOR
SPEED ADJUSTING
SC R E W
T H R OT T L E LEV'JR
P U M P PLUNGER S T E M
BOWL VENT VALVE ADJUSTING TA NG
A C C E L E R A T O R PUMP ROCKER ARM
D I ST S T R IB IB U T O OR R GROU ND SWITCH CO NN ECTOR
PY834
F i g . I — C a r b u r e t o r Asse
ty (Holley 2210 Series)
s y s t e m s . T h e I d l e S y s t e m p r o v i d e s a r i c h m i x t u r e f o r
l e v e l i n t h e b o w l d r o p s t h e float a l s o d r o p s p e r m i t t i n g
s m o o t h i d l e a n d l o w s p e e d p e r f o r m a n c e ; t h e A c c e l e r
a d d i t i o n a l f u e l t o flow p a s t t h e f u e l i n l e t n e e d l e i n t o
a t o r P u m p S y s t e m , p r o v i d e s
du rin g
s i n s e p a r a t t h e b o w l . A baffle o v e r t h e n e e d l e a s s i s t s
n M e t e r i n g S y s t e m , p r o v i d e s an a c c e l e r a t i o n ; t h e M a i n
i n g t h e a i r b u b b l e s f r o m t h e f u e l t o p r o v i d e a m o r e
e c o n o m i c a l m i x t u r e f o r n o r m a l c r u i s i n g c o n d i t i o n s ;
s o l i d f u e l s u p p l y i n t h e b o w l .
additional
fuel
a n d t h e P o w e r E n r i c h m e n t S y s t e m , p r o v i d e s a r i c h e r m i x t u r e w h e n h i g h p o w e r o u t p u t i s d e s i r e d . In
T h e float c h a m b e r i s v e n t e d i n t e r n a l l y i n t o t h e a i r
h o r n . A n e x t e r n a l v e n t a c t u a t e d b y t h e p u m p
a d d i t i o n t o t h e s e f o u r b a s i c s y s t e m s , t h e r e i s a
f u e l i n l e t s y s t e m t h a t c o n s t a n t l y s u p p l i e s t h e f u e l t o
lever
i s o p e n e d at c u r b i d l e o r w h e n t h e e n g i n e i s n o t r u n
n i n g t o r e l e a s e f u e l v a p o r s f r o m t h e b o w l .
t h e b a s i c m e t e r i n g s y s t e m s , a n d a c h o k e s y s t e m w h i c h t e m p o r a r i l y e n r i c h e s t h e m i x t u r e t o ai ai d i n s t a r t i n g
FUEL INLET FITTING
a n d r u n n i n g a c o l d e n g i n e .
Fuel
Inlet
System
(Fig. 2)
A l l f u e l e n t e r s t h e f u e l b o w l t h r o u g h t h e f u e l i n l e t fitting i n t h e b o w l c o v e r .
T h e " V i t o n "
i n t h e f u e l
t i p p e d f u e l i n l e t n e e d l e s e a t s d i r e c t l y
i n l e t s e a t . T h e f u e l i n l e t n e e d l e i s c o n
t r o l l e d b y a n i t r o p h y l float (a c e l l u l a r b u o y a n t
mate
r i a l w h i c h c a n n o t c o l l a p s e o r l e a k ) a n d s t a i n l e s s s t e e l
FLOAT
float l e v e r w h i c h i s h i n g e d b y a " D e l r i n " float f u l
c r u m p i n . T h e
fue l
i n l e t s y s t e m m u s t
constantly
m aintain
t h e s p e c i f i e d l e v e l o f f u e l a s t h e b a s i c f u e l
meterin g
s y s t e m s ar e c a l i b r a t e d t o d e l i v e r t h e p r o p e r
mix ture
o n l y w h e n t h e f u e l i s at t h i s l e v e l . W h e n t h e f u e l
FLOAT A D J U S T I N G TA B
F i g . 2 — fuel Inlet
System System
PY863
14-16
FUELS Y S T E M — H O L L E Y
idle System flows
A
(Fig. 3)
F u e l l u s e d d u r i n g
ation
2200 M A I N
curb
i d l e a n d l o w s p e e d o p e r
t h r o u g h t h e m a i n m e t e r i n g j et i n t o the
main well. A h o r i z o n t a l c o n n e c t i n g p a s s a g e p e r m i t s t h e f u e l t o
flow f r o m t h e m a i n w e l l i n t o t h e i d l e w e l l . F u e l c o n t i n u e s up
t h e i d l e
w e l l an d t h r o u g h a n i d l e
r e s t r i c t i o n i n t o an i d l e
channel
f eed
w h e r e t h e f u e l i s
m i x e d w i t h ai r w h i c h e en n t e r s t h r o u g h i d l e ai r b l e e d s l o c a t e d i n t h e a i r h o r n . A t c u r b i d l e t h e f u e l a n d a i r m i x t u r e t h e i d l e c h a n n e l a n d i s f u r t h e r
f llo ow ws s d own
m i x e d o r b r o k e n u p
b y ai r e n t e r i n g t h e i d l e c h a n n e l t h r o u g h t h e t r a n s f e r s l o t w h i c h i s a b o v e t h e t h r o t t l e v a l v e at c u r b i d l e .
D u r i n g l o w s p e e d
o p e r a t i o n t h e t h r o t t l e v a l v e
m o v e s e x p o s i n g t h e t r a n s f e r s l o t a n d f u e l b e g i n s t o
flow
t h r o u g h t h e t r a n s f e r
M A I N
s l o t as w e l l a s t h e i d l e
p o r t . A s t h e t h r o t t l e v a l v e s ar e o p e n e d f u r t h e r and e n g i n e s p e e d i n c r e a s e s t h e a i r f l o w t h r o u g h t h e c a r b u r e t o r a l s o i n c r e a s e s . . T h i s i n c r e a s e d ai r f l o w c r e a t e s a v a c u u m o r d e p r e s s i o n i n t h e v e n t u r i a n d t h e m a i n
W E L L L
V E N T U R I
Meteri ng Fig. 4—Main Meteri Fig.
P
Y
G
6
5
System
T h e m a i n d i s c h a r g e n o z z l e p a s s a g e i s a p a r t of th e b o o s t e r v e n t u r i w h i c h i s a n i n t e g r a l p a r t o f t h e m a i n
m e t e r i n g s y s t e m b e g i n s t o d i s c h a r g e f u e l .
b o d y c a s t i n g . D i s t r i b u t i o n t a b s i n t h e m a i n v e n t u r i p r o v i d e f u r t h e r v a p o r i z a t i o n o f t h e f u e l a n d a i r m i x
Main
ture.
Metering
System
(Fig. 4)
A s t h e e n g i n e a p p r o a c h e s c r u i s i n g s p e e d t h e i n
T h e m a i n m e t e r i n g s y s t e m i s c a l i b r a t e d t o d e l i v e r a
c r e a s e d ai r f l o w t h r o u g h t h e v e n t u r i c r e a t e s v a c u u m
l e a n m i x t u r e f o r b e s t o v e r a l l e c o n o m y . W h e n a d d i
(low p r e s s u r e a r e a ) i n t h e v e n t u r i o f t h e c a r b u r e t o r .
t i o n a l p o w e r i s r e q u i r e d a v a c u u m o p e r a t e d p o w e r
N e a r a t m o s p h e r i c p r e s s u r e p r e s e n t i n t h e b o w l i n t h e
s y s t e m e n r i c h e s t h e f u e l - a i r m i x t u r e .
a r e a a b o v e t h e f u e l c a u s e s t h e f u e l t o flow to t h e
l o w e r p r e s s u r e a r e a c r e a t e d b y t h e v e n t u r i an d m a g n i f i e d b y t h e b o o s t e r v e n t u r i .
P o w e r Enrichment
System
(Fig. 5)
T h e p o w e r e n r i c h m e n t s y s t e m c o n s i s t s of a p o w e r
F u e l f l o w s t h r o u g h t h e m a i n j e t i n t o t h e m a i n w e l l ;
v a l v e i n s t a l l e d i n t h e c e n t e r o f t h e c a r b u r e t o r b o d y
a i r e n t e r s t h r o u g h t h e m a i n w e l l ai r b l e e d s an d i n t o
b e t w e e n t h e m a i n j e t s a n d a v a c u u m p i s t o n i n s t a l l e d
t h e m a i n w e l l t h r o u g h h o l e s i n t h e m a i n w e l l
i n t h e b o w l c o v e r . A v a c u u m p a s s a g e l e a d s f r o m the
T h e m i x t u r e of f u e l a n d a i r b e i n g l i g h t e r
tube.
t h a n r a w
f u e l r e s p o n d s f a s t e r t o c h a n g e s i n v e n t u r i
t o p o f t h e p i s t o n d o w n t o t h e ma ni fo ld
fla flange nge..
vacuu m
W h e n m a n i f o l d v a c u u m i s h i g h t h e v a c u u m p i s t o n
a n d i s a l s o m o r e r e a d i l y v a p o r i z e d w h e n d i s c h a r g e d
i s r a i s e d t o t h e t o p o f i t s c y l i n d e r a n d t h e s p r i n g o n
i n t o t h e v e n t u r i .
t h e p i s t o n s t e m i s c o m p r e s s e d .
IDLE
FE ED
V A C U U M
I D L E A I R BLEE D
P A S S A G E
P O W E R V A L V E
P I S T O N
T R A N S F E R SLO T
A D J U S T I N G
N E E D L E
PY8 64
Fig. 3—Idle Fig.
System
P O W E R
V A L V E
Fig. 5—Power Enrichment Fig.
P Y 8 6 6
System
HO LL EY 220 0— FU EL SY ST EM
A Wh en manifoIJLTVacuu^
to a
pred eterm ined
l e v e l t h e s p r i n g o v e r c o m e s t h e v a c u u m a n d p u s h e s the piston stem dow n. T h e p i s t o n s t e m
the pow er valv e and
valv e
perm itting
f u e l to t o f lo lo w t h r o u g h t h e p o w e r v a l v e t h r o u g h
pow er
v a l v e c h a n n e l r e s t r i c t i o n s a n d i n t o t h e m a i n w e l l o n
eith er side of the po we r valv e.
Accelerating
Pum p
Syste System m
(Fig.
6)
before
the
the car bur etor resp ond s almost im fuel
ca n
over co me
m aint ain the des ired fuel-air
its
inertia
and
ratio.
T h e p i s t o n t y p e a c c e l e r a t i n g p u m p s y s t e m m e c h a n ica lly s u p p lies th e
f u e l n e c e s s a r y t o
d e f i c i e n c y f o r a s h o r t p e r i o d o f
overcom e
this
tim e.
F u e l e n t e r s t h e p u m p c y l i n d e r f r o m t h e f u e l
thro ugh
a
sl sl o t i n
position
of
cho ke diaph ragm
as
the pu mp
w ell
c h o k e d i a p h r a g m ,
is called vac uu m
M a n i f o l d v a c u u m
al al o n e
is not
kick.
stron g enou gh
to
provid e the pro per degree of ch oke opening du rin g the entire ch ok ing period . Th e imp act of in rus hin g the
offset
cho ke
val ve
pro vid es the
add i
tional opening forc e. the
m e d i a t e l y . H o w e v e r , t h e r e i s a b r i e f t i m e i n t e r v a l o r lag
to the
wh en the engine starts and vac uu m is applied to the
a i r p a s t
W h e n t h e t h r o t t l e v a l v e s a r e o p e n e d s u d d e n l y ow throug h a i r f llo
f r o m t h e t h r o t t l e b o d y
a r u b b € r ~ l iD iD s e ~
s e m b l y . T h e a d j u s t m e n t o f t h e c h o k e v a l v e o p e n i n g ,
i n t u r n p u s h e s t h e p o w e r
stem dow n opening
plied to the c ho ke di ap hm
1 4 -1 7
above the
bo wl
no rm al
A s t h e e n g i n e
w arm s up
manifo ld
heat
transmit
t e d to to t h e c h o k e h o u s i n g r e l a x e s t h e b i - m e t a l s p r i n g unti l
it eventu ally
Distributor
perm its
Vacuum
A s e n g i n e
the
chok e to open
fully.
Adva nce
s p e e d i n c r e a s e s , t h e s p a r k t i m i n g
mu st
b e a d v a n c e d s o t h a t th th e b u r n i n g i n t h e c y l i n d e r m a y b e c o m p l e t e d a t t h e p r o p e r t i m e tto o ac h i e v e m a x i m u m p r e s s u r e a n d e f f i c i e n c y .
is
A v a c u u m s p a r k p o r t l o c a t e d i n t h e t h r o t t l e b o r e ,
t u r n e d o f ff,, f u e l v a p o r s i n t h e p u m p c y l i n d e r a r e vented throug h the area betw een the pu mp r od a nd
j u s t a b o v e t h e c l o s e d t h r o t t l e v a l v e , i s c o n n e c t e d t o t h e d i s t r i b u t o r v a c u u m c h a m b e r b y a s e r i e s o f p a s
pum p
s a g e s t o a fitting i n t h e c a r b u r e t o r b o d y a n d a
the
pu mp
piston.
Wh en
the
engine
plung er.
A s t h e t h r o t t l e l e v e r
is mo ved the pum p link
erating th roug h a sys tem of lever s and a pu mp ride
s p r i n g p u s h e s t h e p u m p
pisto n
op
A s t h e t h r o t t l e i s o p e n e d , t h i s p o r t i s e x p o s e d t o
dow n. Fu el is
m a n i f o l d v a c u u m w h i c h v a r i e s w i t h c h a n g e s i n e n g i n e
needle valve and out the pum p di sc harg e jets wh ic h are dri lled in the m ain body .
Choke
T h e a u t o m a t i c
mi xtu re
System System for
(Fig.
starting
and
ric he r
operatin g
w h i c h i s i n s t a l l e d i n a w e l l i n t h e i n t a k e
cho ke val ve
Wh en
engine
the
PUMP OPERA TING
PUMP OVERRIDE SPRING
in
fuel-air a co ld
the
man ifold ,
clos ed posit ion.
starts, man ifol d
vac uu m is ap
PUMP ASSEMBLY
PUMP DISCHARGE RESTRICTION
LINK
PUMP CUP
F i g . 6—A ccelerating ccelerating
T h i s c h a n g i n g v a c u u m i s a p p l i e d t o t h e d i s t r i b u t o r
T h e d i a p h r a g m ,
7)
e n g i n e . A b i - m e t a l s p r i n g i n s i d e t h e c h o k e h o u s i n g , h o l d s t h e
s p e e d a n d l o a d . v a c u u m d i a p h r a g m .
c hok e prov ides the
requ ired
hose.
over
forc ed throu gh a passage arou nd the pum p disc harg e
Automa tic
f lle e xi xi b bll e
DISCHARGE CHECK NEEDLE
Pum p
System System
in
tur n
rotates
the
dis tributo r
breaker plate through a con necting rod chang ing the s p a r k t i m i n g t o m e e t e n g i n e d e m a n d s .
A t c u r b i d l e , t h e c u r b i d l e s c r e w c o n t a c t s t h e d i s tributor
retar din g solenoid . Th is in tur n retards
the
d i s t r i b u t o r tto o ma xim um r etard for impro ved emissio n co ntr ol a att i d l e .
PY867
PY868
F i g . 7—A utomatic
Choke
System System
1 4 -1 8
F U E L S Y S T E M — H O L L E Y 2200
•A
SERVICE DISASSEMBLING
PROCEDURES
CARBURETOR
o ff f f s h a f t , b e i n g c a r e f u l n o t t o l o s e l e v e r s p r i n g . (Not e p o s i t i o n o f s p r i n g ) . ( F i g . 5). ( 7 ) R e m o v e e i g h t a i r h o r n a t a c h i n g s c r e w s , t h e n l i f t
(1) I n s e r t t h re r e e Tool T - 1 0 9 - 2 8 7 S an d one Tool T109288S e l e v a t i n g legs t h r o u g h c a r b u r e t o r t h r o t t l e body
a i r h o r n s t r a i g h t u p a n d a w a y f r o m m a i n b o d y
m o u n t i n g s t u d holes. (These tools ar e u s e d to p r o t e c t t h r o t t l e v a l v e s f r o m d a m a g e an d to p r o v i d e a s u i t a b l e
s c r e w i n c e n t e r . ) U S E E X T R E M E CARE WHEN H A N D L I N G A I R H O R N S O A S N O T T O B E N D OR
b a s e f o r w o r k i n g . ) ( F i g . 1).
D A M A G E W E L L T U B E S . ( F i g . 6).
(2)
R e m o v e n u t a n d w a s h e r a t t a c h i n g
(long
( 8 ) D i s e n g a g e a c c e l e r a t o r p u m p p l u n g e r f r o m p u m p
accelerator
p u m p r o c k e r a r m t o a c c e l e r a t o r p u m p s h a f t . R e m o v e
s h a f t b y p u s h i n g up o n b o t t o m o f p l u n g e r , t h e n t i l t i n g
a r m f r o m flats o n p u m p s h a f t , t h e n d i s e n g a g e a c c e l e r
s l i g h t l y t o w a r d c e n t e r , t h e n s l i d e of f p u m p s h a f t . S l i d e
a t o r p u m p r o d f r o m c e n t e r s l o t i n a r m an d f r o m h o l e
aii r h o r n an d r e m o v e c o m p r e s s i o n p l u n g e r s t e m out of a
i n t h r o t t l e l e v e r . ( F i g . 2).
s p r i n g ( F i g . 7).
(3)
R e m o v e n u t a n d w a s h e r t h a t a t t ac ac h e s
l e v e r t o c h o k e
shaft. Disen gage
fast idle
(9) S l i d e
ch oke
(4 ) R e m o v e
choke
vacu um
( 1 00))
diaph ragm
pu mp
s h a f t o u t o f a i r h o r n .
( F i g . 8).
co nnec tor
r o d f r o m l e v e r a n d f a s t i d l e c a m . ( F i g . 3). t h r o t t l e b o d y tube
acc elerator
R e m o v e f u e l i n l e t fitting a n d g a s k e t f r o m a i r
horn.
h o s e f r o m
( 1 1 ) W i t h a i r h o r n i n v e r t e d , r e m o v e s c r e w t h a t at
fitting. R e m o v e s c r e w s t h a t a t t a c h
t a c h e s f u e l baffle t o a i r h o r n ( F i g . 9).
c h o k e d i a p h r a g m an d m o u n t i n g b r a c k e t t o a i r h o r n . ( 5 ) R e m o v e c h o k e d i a p h r a g m an d a att t h e s a m e t i m e ,
(1 12 2 ) S l i d e n y l o n float f u l c r u m p i n o u t o f a i r h o r n ,
l i n k f r o m s l o t i n c h o k e
t h e n r e m o v e float. I n v e r t a i r h o r n a n d d r o p o u t f u e l i n l e t n e e d l e . U s i n g a w i d e b l a d e s c r e w d r i v e r , r e m o v e
diseng age ch oke operating
operating
l e v e r . ( F i g . 4) . P l a c e c h o k e u n i t t o o n e s i d e
f u e l i n l e t n e e d l e v a l v e s e a t an d g a s k e t ( F i g . 10).
t o b e c l e a n e d as a s p e c i a l i t e m . A liquid cleaner may damage diaphragm material.
(13) valv e
a self sealing type an d will stick to air horn mounting
l e v e r o n s t u b s h a f t o f a i r h o r n . S l i d e l e v e r
s u r f a c e . C a r e e s h o u l d be used at removal s o a s not to
( 6 ) R e m o v e " E " c l i p t h a t r e t a i n s b o w l operating
R e m o v e a i r h o r n g a s k e t .. (Note: This gasket is
vent
C H O K E
FAST
I D LE
S P E ED
IDLE A D JUST I NG C U R B
A D J U S T I N G
C R A N K C A S E CUR B
S P EE D
IDLE C A
IDLE
A D J U S T I N G
S C R E W
BOWL F A S T
V A C U U M
D I A P H R A G M
T W D H T T I I F\/ A J V C C
S C R E W
VENT
VE N T
T UB E
I
F I T T I N G
SP EE D
SCREW
VA L V E
M FA ST
IDLE
SP EE D
A D J U S T I N G
S C R E W
T H R O T T L E L E V E R
C H O K E
O P E R A T I N G L E V E R
L I M I T E R C A P
I D L E
MIXT URE
A D J U S T I N G
A C C E L E R A T O R
S C R E W )
P U M P P R O D
D I S T R I B U T O R
A D V A N C E
C H O K E
V A C U U M
TUBE
FITT ING
L I M I T E R C A P (IDLE
V A C U U M
D I A P H R A G M F U E L
INLET
D I S T R I B U T O R C R A N K C A S E
TUBE
C A R B U R E T O R
V E NT
TU BE
V E N T
FITTING
C H O K E
V A C U U M
D I A P H R A G M
S W I T C H
SCREW REWS S
FITT ING
G R O U N D
MIXT URE
£
C O N N E C T O R
'
^
~ ' ~ R O T T L E A T T A C H I N G
B O D Y S C R E W S
H O S E D I S T R I B U T O R
C L E A N E R AI R
V A C U U M A D V A N C E
TUBE
FITT ING PY8 35
F ITTI NG
F i g . I — C a r b u r e t o r r
Assembly
-HOLLEY
PU UMP ACCELERATOR P
„ CENTER
ROCKER ARM
Or
2200—FUEL
SYSTEM
14-19
SIO'
'.ATS ON SHAFT .ATS
A,tV\
V.
SLOT N LEVER
CHOKE ERATING L • ERATING LIINK
CHOKE LEVER A C C E L E R A T O R
PUMP K O D
/
LEV?;-
- CHOKE DIAPHRAGM
Nur
THROTTLE
Fig. 2—Removing or install ing Pump Rocker Arm
Acce Accelerator lerator
PY838
Fig. 4—Removing or Insta Install ll ing Cho Choke ke
ma r or scratch mating surface of air horn. ( 1 4) 4)
Remov e vac uu m
power
p i s t o n f r o m a i r h o r n ,
u s i n g tool C-4141 ( F i g . 11). ( T h i s a s s e m b l y i s s t a k e d i n p o s i t i o n an a n d c a r e m u s t b e u s e d a t r e m o v a l . ) R e m o v e s t a k i n g u s i n g a s u i t a b l e s h a r p t o o l . ( 1 5 ) W A R N I N G : D O N O T A T T E M P T T O R E M O V E M A I N W E L L
T U B E S F R O M A I R H O R N . T h e s e t u b e s
a r e a p r e s f i t i n a i r h o r n , a n d w i l l b e d a m a g e d i f r e m o v e d . T h e y c a n b e c l e a n e d i n a s o l v e n t a n d b l o w n d r y w i t h c o m p r e s s e d a i r . I f c a r b u r e t o r c l e a n e d i n a b a s k e t , b e s u r e o t h e r
p a r t s ar e
c arbureto r
parts
( 1 6) 6) U s i n g T o o l T M C - 3 6 A ,
Diaphra Diaphragm gm
sage (Fig. 15).
(1 19 9 ) R e m o v e f a s t i d l e c a m r e t ai ai n i n g " E " c l i p , t h e n s l i d e f a s t i d l e c a m of f s t u b s h a f t ( F i g . 14). (2 200 ) I n v e r t m a i n b o d y an d r e m o v e t h r o t t l e b o d y t o m a i n b o d y a t t a c h i n g s c r e w s . S e p a r a t e b o d i e s an d d i s card
gasket.
(2 21 1)
T u r n i d l e l i m i t e r c a p s s t o s t o p . (Top o f t h r o t t l e
l e v e r s i d e an d b o t t o m o f s t o p o n o t h e r . ) R e m o v e
idle
l i m i t e r c a p s s b y p r y i n g of f w i t h s u i t a b l e t o o l . (B e c a r e f u l n o t t o b e n d s c r e w s . ) ) B e s u r e an d c o u n t n u m b e r o f t u r n s t o s e a t t h e s c r e w s , as th e s a m e n u m b e r o f t u r n s
a r e n o t s t r i k i n g t h e s e t u b e s . rem ov e
main
meterin g
j e t s ( F i g . 12). ( Nu Nu m b e r 6 5 l o c a t e d o n t h r o t t l e l e v e r s i d e e o f b o w l ; n u m b e r 63 o n o p p o s i t e s i d e . )
(1 7 7))
SCREWS JTACHING SC JTACHING
PY836
LOCKWASHER-
Usi ng Too l T109-73S, rem ov e
pow er
( f r o m t h e s e a t ) m u s t b e m a i n t a i n e d at i n s t a l l a t i o n . R e
m o v e s c r e w s an d s p r i n g s f r o m t h r o t t l e b o d y . The
v a l v e a s
c a r b u r e t o r n o w h a s b e e n
d i s a s s e m b l e d into
t h r e e s u b - a s s e m b l i e s , , t h e a i r h o r n , m a i n b o d y , t h r o t t l e
s e m b l y ( F i g . 13).
b o d y a n d t h e c o m p o n e n t s o f e a c h d i s a s s e m b l e d a s f a r
(1 18 8 ) I n v e r t m a i n b o d y a n d d r o p o u t a c c e l e r a t o r p u m p d i s c h a r g e c h e c k n e ed e d l e f r o m d i s c h a r g e p a s -
a s n e c e s s a r y f o r c l e a n i n g a n d i n s p e c t i o n .
VALVE OP OPEN
:HOKc WIDE
Caution: In normal routine cleaning an d overhaul
of t he carburetor, do not remove throttle valv es unless
STUB SHAFT
VJNT VALVE
C ? = : U r i N G LEVER
.
ACHOKERLEVER
FLATS O N SHAFT
FAST IDL DLE CAM
FAS*" I DL DLE CONNECTOR ROD
LOCKWASKZR \
*NU NUT T Fig. 3—Removing or Install ing Fast I dle Connector Rod
PY837
t N D S OF
„ SPRING
BOWL VENT VALVE
SPRING NG , L
E
CU P —
Fig. 5—Removing or Install ing B owl Vent Operating lever
Valve
14 - 2 0
FU EL SY ST EM —H OL LEY
2 2200 0
A R
G A SK E T
•A
SLOTS
HORN
FUEL BAFFLE
L UG S
ACCELERATOR PUMP PLUNGER
M A I N W E LL LL T U B E S . ^ D O NO T BEND
MAIN BODY
FULCRUM PIN CENTERED
ATTACHING SCREW-
PY843 VACUUM POWER PISTON STEM
Fig. 9—Removing or Instal ling PY840
Fuel Bahle
they^ ar e nicked or damaged, i f necessary to remove, p r o c e e d as follows:
Fig. 6—Removing or installing Mir Horn
(1) (1) R e m o v e s c r e w s that h o l d t h r o t t l e v a l v e s i n t h r o t t l e s h a f t . These screws are staked to prevent loosening and care is necessary to avoid br eaking off
in shaft. R e m o v e staking with a file.
(2 ) S l i d e d a m a g e d v a l v e s o u t of b o r e s . It s h o u l d be n o t e d at t h i s t i m e , t h a t t he n u m b e r e d s i d e i s on t he
b o t t o m (or c a r b u r e t o r m o u n t i n g f la n g e s i d e ) a n d o p
ACCELERATOR-^ PUMP * SHAFT
p o s i t e t h e i d l e m i x t u r e s c r e w p o r t s .
ACCELERATOR PUMP PLUNGER STEM
— F L OA T
PY841 Fig. 7—Removing or i in nstallin lling Pump Plunger
A D J U S T I N G TAB
Accelerator Ac
(FLOAT DROP)
ACCELERATOR PUMP SHAFT FUEL INLET TUBE FITTING
SCREWDRIVER PUMP PLUNGER
\ *~ 6
j> SEAT AN D G A S K E T
SMALL EN D OF SP R I NG
PY842
Fig. 8—Removin ing or Installing Pump
Shaft
Accelerator Ac
FUEL INLET NEEDLE
»»*f*
Fig. 10—Removing or Install ing Needle Seat
PY844 Float and
O L LE LE Y ,— H OL
•
M A I N WELL DO
N OT
IN
HORN CAS CASTING TING
14-21
SPECIAL
TUBE S TUBES
TOOL
REMOVE.
SERVICED
2200— FUEL SY ST EM
H E
AI R AIR ONLY
VACUUM * POW ER
S T U B S H A F T
PISTON PIS TON
• FAST I D L E C A M
m
4 ~;
x
/
THROTTLE WID E
S T O P L U G
PY845
F i g . 1 1 — R e m o v i n g g Vacuum Power
" E "
OP EN
PY848
CL IP
F i g . 14—Removing or In Cam Installin ing Fast Idle Ca
I N S P E C T I O N AN D R E A S S E M B L Y
Pi ston
DO N OT c l e a n a n y r u b b e r o r p l a s t i c p a r t s i n c l u d i n g d i a p h r a g m s a n d e l e c t r i c a l p a r t s (that m a y b e a t t a c h e d t o c a r b u r e t o r ) i n c l e a n i n g s o l v e n t b e c a u s e o f p o s s i b l e damage. C h e c k k f o r c r a c k s , w a r p a g e , s t r i p p e d s c r e w t h r e a d s ,
d a m a g e d o r m a r r e d
m a t i n g s u r f a c e s , o n a l l m a j o r
c a s t i n g s . . T h e p a s s a g e s i n t h e c a s t i n g s s h o u l d b e f r e e
o f r e s t r i c t i o n s . I n s t a l l n e w c a s t i n g s as r e q u i r e d . C h e c k f l o a t a s s e m b l y f o r d a m a g e o r an y c o n d i t i o n t h a t w o u l d
SPEC IAL TOOL
PUMP D I S C H A R G E
CHECK NEEDLE M A I N METERI METERI NG JET
i m p a i r t h i s i t e m f r o m f u r t h e r s e r v i c e . T h e c h o k e a n d t h r o t t l e v a l v e s s h o u l d b e r e p l a c e d i f t h e e d g e s h a v e b e e n n i c k e d o r i f t h e p r o t e c t i v e p l a t i n g h a s b e e n r e m o v e d . B e s u r e t h a t t h e c h o k e an d t h r o t t l e s h a f t s a r e
(#63) M A I N
JET (#65)
P O W E R VALVE
PY846
F i g . 1 2 — R e m o v i n g or Insta Install ll ing Main Metering
CLEANING CAR BUR ETOR
n o t b e n t o r s c o r e d . R e p l a c e a n y b r o k e n o r d i s t o r t e d
METERING
Jets
PART S
s p r i n g s . R e p l a c e al l t h r e a d s a n d l o c k w a s h e r s t h a t s h o w s i g n s o f s t r i p p e d t h r e a d s o r d i s t o r t i o n .
Throttle Body I f t h e t h r o t t l e v a l v e s w e r e r e m o v e d b e c a u s e of d a m -
Eefer to G e n e r a l I n f o r m a t i o n S e c ttii on o n at f r o n t of F u e l
S y s t e m , f or c l e a n i n g I n s t r u c t i o n s .
• l
• C H E C K
NEEDLE
DISCHARGE
. SPECIAL
TOOL
POWER V A L V E
PY847 Fig. 13-Removing
or Install ing Power
PASSAGE
Valve
PY849
F i g . 15—Instal li ng Accelerator Pu mp Check Needle
Discharge
14-22
F U E L S Y S T E M — H O L L E Y 2200
a ggee , i n s t a l l n e w v a l v e s a s f o l l o w s : (1) S l i d e n e w v a l v e s i n t o p os os i t i o n i n t h r o t t l e s h a f t , w i t h t h e v a l v e n u m b e r o n t h e b o t t o m , ((o or m ount ing
flange s i d e , ) a n d a w a y f r o m i d l e a i r m i x t u r e a d j u s t i n g scr ew ports. (2 ) I n s t a l l n e w v a l v e s ccrr e w s b u t d o n o t t i g h t e n .
r ^gf?^T'
>
BRASS ROD U ACCELERATOR
(3 ) H ol d v a l v e s i n p l a c e w i t h f in in g eerr s. s. ( F i n g e r s p r e s s i n g o n h i g h s i d e o f v a l v e s . ) (4) Tap v a l v e l i g h t l y w i t h a s c r e w d r i v e r t o c e n t e r I n b o r e s . N o w , t i g h t e n v a l v e a t t a c h i n g s c r e w s s e c u r e l y .
PUMP
O p e r a t e t h e t h r o t t l e s h a f t . F r o m c l o s e d t o o p e n posi t i o n , t h e y m u s t o p e r a t e s m o o t h l y w i t h o u t d r a g o r s t i c k i n g . H o l d t h r o t t l e b o d y u p t o a s t r o n g l i g h t . T h e l i g h t t w h i c h I s v i s i b l e a r o u n d t h e o u t e r d i a m e t e r o f v a l v e s i n b o r e s h o u l d b e u n i f o r m . S t a k e s c r e w s , u s i n g a p a i r of of p l i e r s . (5 ) I n s t a l l i d l e m i x t u r e s c r e w s a n d s p r in in g s i n b o d y . ( T he he t a p e r e d p o r t i o n m u s t b bee s t r a i g h t a n d s m o o t h . I f t h e t a p e r e d p o r t i o n i s g r o o v e d o r r i d g e d , a n e w i d l e m i x t u r e s c r e w s h o u l d b e i n s t a l l e d t o I n s u r e h a v i n g c o r re r e c t i d l e m i x t u r e c o n t r o ll.. ) ) D O N O T U S E A S C R E W
(7 ) I n s t a l l m a i n m e t e r i n g j e t s , u s i n g T o o l T M C - 3 6 A . (F i g . 12). 12). T i g h t en s e c u r e lly y . ( N u m b e r 6 5 o n t h r o t t l e l e v e r r s i d e a n d n u m b e r 6 3 a n o t h e r s i d e o f b o w l . )
D R I V E R . T u r n s c r e w s l i g h t l y a g a i n s t t h e i r s e a t s w i t h f in in ggee rs rs . B a c k o ff ff t h e n u m b e r o f t u r n s ( f r o m t h e s e a t )
( 8 ) I n s t a l l a c c e l e r a t o orr p u m p d i s c h a r g e c h e c k n e e d l e i n p u m p d i s c h a r g e p a s s a g e (Fig . 15).
c o u n t e d a t d i s a s s e m b l y . I n s t a l l n e w p l a s t iicc ca ps w i t h t a b a ga ga i n s t s t o p .
M ai n (1)
Body Invert
m a i n b o d y a n d p l a c e a n e w g a s k e t i n
p o s i t i o n . P l a c e t h r o t t l e b o d y o n m a i n b o d y a n d a l i g n . I n s t a l l a t t a c h i n g s c r e w s a n d t i g h t e n s e c u r e l y .
( 2 ) I n s t a l l a c c e l e r a t o r p u m p d i s c h a r g e c h e c k n e e d l e i n d i s c h a r g e p a s s a g e (Fig . 15). C h e e k a c c e l e r a t o r p u m p , f u e l i n l e t a n d d i s c h a r g e s y s t e m s a s f o l l o w s : (3 ) P o u r c l e a n g a s o l i n e i n t o f u e l b o w l , a p p r o x i m a t e l y 1 I n c h d e e p . S l i d e a c c e l e r a t o r p u m p p l u n g e r I n t o c y l i n d e r . R a i s e p l u n g e r a n d p r e s s d o w n l i g h t l y o n p l u n g e r s t e m t o e x p e l l a l l a i r f r o m p u m p p a s s a g e . ( 4) 4) U s i n g a s m a l l c llee a n b r a s s r o d , h o l d d i s c h a r g e
c h e c k n e e d l e d o w n o n i t s s e a t . A g a i n r a i s e p l u n g e r a n d p r e s s d o w n w a r d . N o f u e l s h ou ou l d b e e m i t t e d f r o m p u m p d i s c h a r g e p a s s a g e (Fig . 16). I f a n y f u e l d o e s e m i t f r o m d i s c h a r g e p a s s a g e , i t i n d i c a t e s t h e p r e s e n c e of d i r t o r a d a m a g e d or or w o r n c h e c k n e e d l e , o r s e a t . C l e a n t h e p a s s a g e a g a i n a n d r e t e s t a s a b o v e . I f l e a k a g e i s s t i l l e v i d e n t , a t t e m p t t o f o r m a n e w s e a t a s f o l l o w s : ( 5 ) W i t h d i s c h a r g e c h e c k n e e d l e in in s t a l l e d , i n s e r t a p i e c e o f d r i l l r o d d o w n o n n e e d l e . L i g h t l y t a p d r i l l r o d w i t h a h a m m e r t o f o r m a n e w s e a t . R e m o v e a n d d i s c a r d o l d n e e d l e a n d i n s t a l l a n e w o n e . R e t e s t as d e s c r i b e d p r e v i o u s l y . I f s e r v i c e fix d o e s n o t c o r r e c t t h e c o n d i t i o n , a n e w m a i n b o d y s h o u l d b e i n s t a l l e d . R e m o v e a c c e l e r a t o r p u m p p l u n g e r , d i s c h a r g e c h e c k n e e d l e a n d f u e l f r o m m a i n b o d y . (6)
I n s t a l l p o w e r v a l v e , u s i n g T o o l T 1 0 9 - 7 3 S ,
1 3 ) . T i g h t e n s e c u r e l y .
\ NO FUEL SHOULD BE
EMITTED FROM PASSAGE OR PARTS
er at o r F i g . 1 6 — T e s t i n g A c c e l er Check
Pu m p Needle
PY850
D i s c h ar g e
Ai r Horn (1) T e s t f r e e n e s s o f c h o k e m e c h a n i s m i n a i r h o r n . T h e c h o k e sh af t m u st f lloat oat f r e e t o o p e r a t e c o r r e c t l y . I f c h o k e s t i c k s i n b e a r i n g b o r e s , o r a p p e a r s to be g u m m e d f r o m d e p o s i t s i n a i r h o r n , a t h o r o u g h c l e a n i n g w i l l b bee r e q u i r e d . ( 2) 2) I n s t a l l v a c u u m p o w e r p i s t o n i n i t s c y l i n d e r ( F i g. g. 17). L o c k i n p o s i t i o n b y p r i c k p u n c h i n g r i m o off c y l i n d er (at l e a s t t h r e e p l a c e s . ) D o n o t o v e r - s t a k e . C o m p r e s s piston to be sure no binding exists. If piston sticks or bind s enough to hin de r sm ooth operation , a ne w pis bee i n s t a l l e d . t o n s h o u l d b (3 ) S l i d e a c c e l e r a t o r p u m p p l u n g e r c o m p re re s s i o n s p r i n g o v e r p l u n g e r s t e m , w i t h s m a l l d i a m e t e r t o w a r d
TO SEAT S PECI A L TOOL TO PISTON R E T A I N I N G WASHER
PY851
(Fig. F i g . 1 7 — I n s t al l i n g V ac u u m Po w e r
Pi s t o n
-HOLLEY 2200— 2200—FUEL FUEL SYSTEM plungeiHBEist^hP ™?
s h a f t t l i t a ir h o r n ( F i g . 8).
1
FLOA TS
14-23
r L O A T R A I SE SE D
(4 ) A s p l u n g e r is b e i n g I n s t a l l e d I n a ir h o r n , s l i g h t l y t i l t p l u n g e r to e n g a g e w i t h p l u n g e r s h a f t . (5) I n s t a l l
f u e l I n l e t n e e d l e v a l v e s e a t a n d g a s k e t
i n a i r h o r n .
Tighten
s e c u r e l y , u s i n g a w i d e
pi
blade
s c r e w d r i v e r . I n s t a l l f u e l i n l e t n e e d l e i n s e a t ( F i g . 10).
( 6 ) I n s t a l l float i n p o s i t i o n , t h e n s l i d e n y l o n f u l c r u m p i n t h r o u g h float h i n g e t o r e t a i n float. C e n t e r f u l c r u m p i n (F ( F i g . 9). ( 7 ) IIn n s t a l l f u e l baffle o n b o s s e s w i t h s l o t s e n g a g e d l u g s . I n s t a l l a t t a c h i n g s c r e w an d t i g h t e n s e c u r e l y ( Fi g.
F L O A T A D J U S T I N G LIP
9).
Measuring
Float
PY853
Setting
T h e c a r b u r e t o r s a r e e q u i p p e d w i t h a v i t o n
tipped
f u e l i n l e t n e e d l e . T h e t i p i s f l e x i b l e e n o u g h t o m a k e a g o o d s e a l l o n t h e n e e d l e s e a t , a n d t o g i v e i n c r e a s e d r e s i s t a n c e e t o f lo o d in g . Care should be taken t o perform
t h i s o p e r a t i o n a c c u r a t e l y in o r d e r to s e c u r e b e s t p e r f o r m a n c e a n d f u e l e c o n oom my. (1 ) T o c o r r e c t l y s et float h e i g h t w h e n c a r b u r e t o r i s b e i n g o v e r h a u l e d , p r o c e e d as as f o l l o w s : ( 2 ) I n v e r t a i r h o r n s o t h a t w e i g h t o f float only i s forc ing n eedle against seat. (3)
M e a s u r e t h e c l e a r a n c e b e t w e e n t o p o f float a n d
float s t o p ( F i g . 18). 18). Th e c l e a r a n c e s h o u l d b e .200 i n c h
d= 1/6 4 (#7 d r i l l ) . B e s u r e d r i l l o r g a u g e i s p e r f e c t l y level wh en measur ing. I f a n a d j u s t m e n t i s n e c e s s a r y , b e n t float l i p t o w a r d or
a w a y f r o m n e e d l e , u s i n g a n a r r o w
b l a d e s c r e w
d r i v e r ( F i g . 19), u n t i l c o r r e c t c l e a r a n c e o r s e t t i n g has been
obtained.
( 4 ) C h e c k float d r o p , b y h o l d i n g a i r h o r n i n a n u p r i g h t p o s i t i o n . T h e b o t t o m e d g e o f float s h o u l d b e
p a r a l l e l t o u n d e r s i d e s u r f a c e o f a i r h o r n ( F i g . 20). If a n a d j u s t m e n t i s n e c e s s a r y , b e n d
t a n g o n float a r m
u n t i l p a r a l l e l s u r f a c e s h a v e b e e n o b t a i n e d .
Installing
A ir
of plunger on sharp edge of cylinder. I n s t a l l a t t a c h i n g s c r e w s ( l o n g s c r e w i n c e n t e r ) a n d t i g h t e n s e c u r e l y ( F i g . . 6).
( 2 ) IIn n s t a l l f u e l i n l e t t u b e fitting a n d g a s k e t i n a i r h o r n an d t i g h t e n s e c u r e l y . ( 3 ) E n g a g e h o o k e d en d o f a c c e l e r a t o r p u m p r o d i n t h r o t t l e l e v e r ( h o o k en d t o w a r d o u t s i d e ) . E n g a g e o t h e r
e n d o f r o d i n c e n t e r s l o t o f p u m p r o c k e r a r m ( F i g . 2). ( 4 ) I n s t a l l r o c k e r a r m o n a c c e l e r a t o r p u m p w i t h flats i n a l i g n m e n t
shaft
( F i g . 2) . I n s t a l l a t t a c h i n g l o c k
w a s h e r a n d n u t . T i g h t e n s e c u r e l y .
( 5 ) I n s t a l l b o w l v e n t v a l v e l e v e r o n a i r h o r n , b y f ir s t i n s e r t i n g s p r i n g i n t o p o s i t i o n i n a r m , w i t h e n d s o f s p r i n g p o i n t i n g t o w a r d f u e l i n l e t fitting ( F i g . 5). S l i d e a s s e m b l y o v e r s t u b s h a f t o n a i r h o r n . A l i g n s p r i n g and
a r m w i t h s t u b s h a f t a n d e n d of s p r i n g o v e r r a i s e d p o r t i o n o f f u e l i n l e t fitting. I n s t a l l
E
c l i p t o s e c u r e . V e n t
v a l v e s h o u l d be i n c l o s e d p o s i t i o n .
( 6 ) I n s t a l l f a s t i d l e c a m o n ai a i r h o r n s t u b s h a f t , w i t h s t e p s t o w a r d
fast
idle
a d j u s t i n g s c r e w . I n s t a l l " E "
(7 ) T o i n s t a l l f a s t i d l e c o n n e c t o r r o d , e n g a g e p l a i n
Horn
b e s u r e m a i n w e l l t u b e s a r e s t r a i g h t . L o w e r a i r h o r n d o w n o n m a i n
p u m p p l u n g e r i n t o i t s c y l i n d e r . Caution: Do not cut lip
c l i p t o s e c u r e ( F i g . 14).
( 1) 1) P l a c e a n e w g a s k e t o n a i r h o r n , t h e n c h e c k t o straight
Fig. 19—Bending Float Adjusting Lip
body;
guiding
e n d i n s l o t o f f a s t i d l e c a m ( f r o m i n s i d e ) . E n g a g e o t h e r e n d o f r o d i n c h o k e l e v e r . W i t h c h o k e v a l v e w i d e o p e n ,
accelerator AIR
HORN
FLOAT STOP AIR HORN
IN VERTED
UNDERSIDE \ S U R F A C E O F yj A IR H O R N m
F L O A T -
-FLOAT D R I L L OR G A U G E
Fig. IB-Checking
PY852
Float
Setting
BOTTOM EDGE OF FLOAT
F L O A T S H O U L D B E P A R A L L E D
Fig. 20—Checking
Float
PY854
Drop
14-24
FUEL
S Y S T E M — H O L L E Y 2200-
a t ss)) a n d p o i n t s l i d e l e v e r o v e r c h o k e s h a f t s ; ( a l i g n i n g f lla i n g d i r e c t l y t o f a s t i d l e c a m s t u b s h a f t ( F i g . 3). I n s t a l l a t t a c h i n g l o c k w a s h e r a n d n u t . T i g h t e n s e c u r e l y .
Choke
V ac u u m
LIGHT CLOSING A PRESSURE ON * CHOKE LEVER ~
D i ap h r ag m
I n s p e c t t t h e d i a p h r a g m v a c u u m fitting t o b e s u r e that t h e p a s s a g e i s n o t p l u g g e d w i t h f o r e i g n m a t e r i a l . L e a k c h e c k t h e d i a p h r a g m t o d e t e r m i n e i f i t h as i n
t e r n a l l e a k s . T o d o t h i s , f i rs rs t d e p r e s s t h e d i a p h r a g m s t e m , t h e n p l a c e a f i n g e r
DRILL OR GAUGE FAST IDLE S SP PEED ADJUSTING SCREW ON SECOND HIGHEST STEP OF CAM (ADJUST SCREW TO OBTAIN FAST IDL DLE
o v e r t h e fitting t o s e a l t h e
o p e n i n g . R e l e a s e t h e s t e m . I f t h e s t e m m o v e s
mo re
t h a n 1 / 1 6 i n c h i n 1 0 (ten) s e c o n d s , t h e l e a k a g e i s e x c e s s i v e a n d t h e a s s e m b l y m u s t b e r e p l a c e d .
I n s t a l l c h o k e d i a p h r a g m a s s e m b l y o n t h e a i r h o r n a s f o l l o w s :
S
(1 1)) E n g a g e f r e e e n d o f c h o k e o p e r a t i n g l i n k i n s l o t of choke lever. brac ket
o n a i r h o r n . I n s t a l l a t t a c h i n g s c r e w s a n d t i g h t e n s e curely.
( 3 ) I n s p e c t r u b b e r h o s e f o r c r a c k s b e f o r e p l a c i n g i t o n c o r r e c t c a r b u r e t o r fitting, ( F i g . 1) a f t e r k i c k a d j u s t m e n t h a s b e e n m a d e .
CARBURETOR
BEND ROD « F O R ADJUSTMENT
I
( 2 ) I n s t a l l c h o k e d i a p h r a g m a n d m o u n t i n g
vac uu m
E
E
«
-
CA M
PY855 SCREW PY8
F i g . 21 — Fast Idle Speed and Cam Position
Adjustment
k i c k a d j u s t m e n t . U s e e i t h e r a d i s t r i b u t o r t e s t m a c h i n e w i t h a v a c u u m s o u r c e , o r v a c u u m s u p p l i e d b y a n o t h e r
vehicle.
ADJUSTMENTS
(1 ) I f a d j u s t m e n t i s t o b e m a d e w i t h e n g i n e r u n n i n g , adjustm ents
d i s c o n n e c t f a s t i d l e l i n k a g e t o a l l o w c h o k e t o c l o s e t o
c a r b u r e t o r an d i n th e
t h e k i c k p o s i t i o n w i t h e n g i n e at c u r b i d l e . I f a n a u x i l
It i s v e r y i m p o r t a n t t h a t t h e f o l l o w i n g
a r e m a d e o n a r e c o n d i t i o n e d
AT ANGLE
P
i a r y v a c u u m s o u r c e i s t o b e u s e d , o p e n t h r o t t l e v a l v e s
s e q u e n c e l i s t e d :
( e n g i n e n o t r u n n i n g ) a n d m o v e c h o k e t o c l o s e d p o s i
Fast
Idle
Speed
T h e f a s t i d l e
and Cam Position
Adjustment
engin e speed adju stm ent
s h o u l d b e
t i o n . R e l e a s e t h r o t t l e f i rrss tt,, t h e n r e l e a s e c h o k e . (2) W h e n
u s i n g a n a u x i l i a r y
v a c u u m s o u r c e , d i s
m a d e o n t h e v e h i c l e , a s d e s c r i b e d i n t h e F a s t I d l e
c o n n e c t v a c u u m h o s e f r o m c a r b u r e t o r a n d c o n n e c t i t
S p e e d A d j u s t m e n t (O n V e h i c l e ) p a r a g r a p h . H o w e v e r ,
t o h o s e f r o m v a c u u m s u p p l y , w i t h a s m a l l l e n g t h o f
t h e F a s t I d l e C a m P o s i t i o n A d j u s t m e n t c a n b e m a d e
t u b e t o a c t a s a fitting. R e m o v a l o f h o s e f r o m d i a
o n t h e b e n c h . T h i s a d j u s t m e n t i s i m p o r t a n t t o a s s u r e
p h r a g m m a y r e q u i r e f o r c e s w h i c h c a n d a m a g e t h e s y s
t h a t t h e s p e e d s o f e a c h s t e p o f t h e c a m o c c u r a t t h e
t e m . A p p l y a v a c u u m of 10 o r m o r e i n c h e s o f m e r c u r y . ( 3 ) I n s e r t s p e c i f i e d d r i l l ( r e f e r t o S p e c i f i c a t i o n s ) b e-
p r o p e r t i m e d u r i n g e n g i n e w a r m - u p . (1 ) W i t h f a s t i d l e s p e e d a d j u s t i n g s c r e w c o n t a c t i n g s e c o n d h i g h e s t s p e e d s t e p o n t h e f a s t i d l e c a m , m o v e ,
c h o k e v a l v e t o w a r d c l o s e d p o s i t i o n w i t h l i g h t p r e s s u r e
on cho ke shaft le ver. (2 ) I n s e r t s p e c i f i e d d r i l l ( s e e S p e c i f i c a t i o n s ) b e t w e e n t o p o f c h o k e v a l v e a n d w a l l o f a i r h o r n (Fi g. 21) . A n a d j u s t m e n t w i l l b e n e c e s s a r y i f a s l i g h t d r a g i s n o t
OR GAUGE
DRiLL
MINIMUM OF INC NCHES 10 I OF VACUUM OR DIAPHRAGM (REQUIRED)
4
o b t a i n e d a s d r i l l s h a n k i s b e i n g r e m o v e d . (3 ) I f a n a d j u s t m e n t i s n e c e s s a r y , b e n d c o n n e c t o r r o d a t a n g l e ,
usin g Too l
c o r r e c t v a l v e o p e n i n g h a s b e e n
V a c u u m Kick Adjustment—(This m a d e On or Off vehicle.) T h e c h o k e d i a p h r a g m
fast
T 10 10 9 - 2 1 3 3,,
id le un til
obta ined.
test test can be
TO VACUUM SOURCE
LIGHT ^CLOSING PRESSURE ON CHOKE LEVER BEND LINK FOR ADJUSTMENT PY856
a d j u s t m e n t c o n t r o l s t h e f u e l
d e l i v e r y w h i l e t h e e n g i n e i s r u n n i n g . I t p o s i t i o n s t h e c h o k e v a l v e w i t h i n t h e a i r h o r n b y a c t i o n o f t h e l i n k
a g e b e t w e e n t h e c h o k e s h a f t a n d t h e d i a p h r a g m . T h e d i a p h r a g m m u s t b e e n e r g i z e d t o m e a s u r e t h e v a c u u m
F i g . 2 2 — V ac u u m
Kick
A d j u sstt m e n t
A
H O L L E Y 2200—FU E L
SY ST E M
14-2S
t w e e n t o p o f c h o k e v a l v e a n d w a l l o f ai r h o r n ( F i g . 22). Ap ply
s u f f iicc i e n t c l o s i n g p r e s s u r e o n l e v e r t o w h i c h
c h o k e r o d a t t a c h e s t o p r o v i d e a m i n i m u m c h o k e v a l v e o p e n i n g , w i t h o u t d i s t o r t i o n o f d i a p h r a g m
l i n k . Not e
t h a t t h e c y l i n d r i c a l s t e m o f d i a p h r a g m w i l l e x t e n d a s
internal
s p r i n g i s c o m p r e s s e d . T h i s s p r i n g m u s t b e
f u l l y c o m p r e s s e d f o r p r o p e r m e a s u r e m e n t o f v a c u u m k i c k a d j u s t m e n t .
(4 ) A n a d j u s t m e n t w i l l b e n e c e s s a r y i f a s l i g h t d r a g i s n o t o b t a i n e d a s d r i l l i s b e i n g r e m o v e d . S h o r t e n o r
l e n g t h e n d i a p h r a g m l i n k t o o b t a in in c o r r e c t c h o k e o p e n i n g . L e n g t h c h a n g e s s h o u l d b e m a d e c a r e f u l l y b y b e n d
i n g ( o p e n o r c l o s i n g ) t h e b e n d p r o v i d e d i n d i a p h r a g m
l i n k . C A U T I O N : D O N OT A P P L Y
T W I S T I N G OR
B E N D I N G F O R C E T O D I A P H R A G M .
(5 ) R e i n s t a l l v a c u u m fitting.
h o s e o n c o r r e c t
carbu retor
R e t u r n f a s t i d l e l i n k a g e t o i t s o r i g i n a l c o n d i
t i o n i f d i s t u r b e d as s u g g e s t e d i n S t e p No . 1.
(6 ) M a k e f o l lo l o w i n g c h e c k . W i t h n o v a c u u m a p p l i e d
t o d i a p h r a g m , t h e c h o k e v a l v e s h o u l d
move freely
Fig. 24—A ccele ccelerator rator
Pum p
Adjustment
l e v e r , , a s l i g h t d r a g s h o u l d b e f e l t as d r i l l i s b e i n g
o p e n a n d c l o s e d p o s i t i o n s . I f m o v e m e n t i s
w i t h d r a w n . I f a n a d j u s t m e n t i s n e c e s s a r y , b e n d u n
n o t f r e e , e x a m i n e l i n k a g e f o r m i s a l i g n m e n t o r i n t e r
l o a d e r t a n g o n t h r o t t l e l e v e r u n t i l c o r r e c t o p e n i n g h a s b e e n o b t a i n e d ( F i g . 2 3 ). ). U s e T o o l T 1 0 9 - 2 1 3 .
betw een
f e r e n c e s c a u s e d b y b e n d i n g o p e r a t i o n . R e p e a t a d j u s t
m e n t i f n e c e s s a r y t o p r o v i d e p r o p e r l i n k o p e r a t i o n .
Choke
Unloader
(W ide
Open
Kick)
t i a l l y o p e n t h e c h o k e v a l v e at w i d e o p e n t h r o t t l e . I t i s
u s e d t o e l i m i n a t e c h o k e e n r i c h m e n t d u r i n g c r a n k i n g
f llo oo od de ed d o r s t a l l e d
b y e x c e s s i v e c h o k e e n r i c h m e n t c a n b e c l e a r e d b y u s e of the unlo ader. Adj us t the choke unload er as follows : (1 ) H o l d t h r o t t l e v a l v e s i n w i d e
o p e n p o s i t i o n . I n
s e r t s p e c i f i e d d r i l l ( s e ee e Specifications) betw een
up per
e d g e o f c h o k e v a l v e a n d i n n e r w a l l o f a i r h o r n ( F i g . 23). (2 ) W i t h a f in g e r l i g h t l y p r e s s i n g
Pump
(1 ) B a c k of f c u r b i d l e s p e e d a d j u s t i n g s c r e w . O p e n
T h e c h o k e u n l o a d e r i s a m e c h a n i c a l d e v i c e t o p a r
o f a n e n g i n e . E n g i n e s w h i c h h a v e
A c c e l e r a t o r
against
Fig. 2 3 — C h o k e U n l o a d e r Adjustment ( W i d e O p e n K i c k )
sh aft
c h o k e v a l v e s o t h a t f a s t i d l e c a m a l l o w s t h r o t t l e v a l v e s
t o b e c o m p l e t e l y s e a t e d i n b o r e s . B e s u r e t h a t p u m p c o n n e c t o r r o d i s i n s t a l l e d i n c e n t e r s l o t o f a c c e l e r a t o r
pum p roc ker arm . (2 ) C l o s e t h r o t t l e v a l v e s t i g h t l y . M e a s u r e t h e d i s t a n c e b e t w e e n t o p o f a i r h o r n a n d e n d o f p l u n g e r s h a f t ( F i g . 2 4 4)) . T h i s m e a s u r e m e n t s h o u l d b e 9 / 1 6 i n c h .
(3 ) T o a d j u s t p u m p
travel, bend
pum p
operating
r o d , u s i n g T o o l T 1 0 9 -2 - 2 1 3 , a t l o o p o f r o d , u n t i l c o r r e c t
setting has been obtained. Bowf Vent (1 ) W i t h c u r b i d l e s p e e d a d j u s t i n g s c r e w at c u r b
W
Fig. 25—B owl Vent
Adjustment
PY859
14-28 -28
A
F U E L S Y S T E M — A V S
idle, there
s h o u l d b e 5/64 i n c h c l e a r a n c e
between
CHOKE VALVE ^ W I D E O P EEN N
b o w l v e n t v a l v e an d s e a t o n a i r h o r n w h e n t h r o t t l e v a l v e s ar e c l o s e d ( F i g . 25).
(2 ) If an a d j u s t m e n t i s n e c e s s a r y , b e n d t a n g on ac
J*—.:«r
c e l e r a t o r p u m p r o c k e r a r m , u s i n g T o o l T 1 0 9 --4 41, until c o r r e c t t v e n t v a l v e o p e n i n g h as b e e n o b t a i n e d .
1
Idle
Speed
Adjustm ent
(Curb
FAST IDLE
WSPEED
ADJUS DJUSTING A \ A
* I SCREW ON
.'SECOND HIGHEST STEP OF CAM (A DJ U S T SCREW TO OBTAIN FAST IDLE SPEED)
Idle)
( R e f e r t o G e n e r a l I n f o r m a t i o n at F r o n t of S e c t i o n . )
F a s t Idle
Speed
F a s t i d l e
Adjustment
(On
Vehicle)
e n g i n e s p e e d i s u s e d t o o v e r c o m e
cold
e n g i n e f r i c t i o n s t a l l s , a f t e r c o l d s t a r t s an d s t a l l s b e c a u s e of c a r b u r e t o r i c i n g . Set t h i s
adjus tm ent
after
t h e v e h i c l e o d o m e t e r i n d i c a t e s o v e r 500 m i l e s t o i n
FAST IDLE CAM
s u r e a n o r m a l e n g i n e f r i c t i o n l e v e l . P r e p a r e e n g i n e b y
d r i v i n g at l ea e a s t f iivv e m i l e s . C o n n e c t a t a c h o m e t e r and
PY8 60
s e t t h e c u r b i d l e s p e e d a n d m i x t u r e , t h e n p r o c e e d as
Fig. 26-Fast
follows: (1 ) W i t h e n g i n e off and t r a n s m i s s i o n i n P A R K o r
(4 ) S t o p p i n g
( 2 ) C l o s e c h o k e v a l v e u n t i l f a s t i d l e s c r e w c an be s t e p of f a s t i d l e c a m
engine
between
a d j u s t m e n t s is not
n e c e s s a r y . H o w e v e r , r e p o s i t i o n f a s t i d l e s p e e d s c r e w
o n c a m a f t e r e a c h s p e e d a d j u s t m e n t t o p r o v i d e c o r r e c t t h r o t t l e c l o s i n g t o r q u e .
( F i g . 26).
(3 ) S t a r t
Bdle Sp®e Sp®edl dl Adjustment (On Vehicle)
s p e e d . (See S p e c i f i c a t i o n s . )
N E U T R A L p o s i t i o n , o p e n t h r o t t l e s l i g h t l y .
p o s i t i o n e d o n s e c o n d h i g h e s t
SCREW
e n g i n e an d d e t e r m i n e
T o s et i d l e s p e e d o n v e h i c l e s , r e f e r t o F u e l S y s t e m
s t a b i l i ze ze d s p e e d .
T u r n f a s t id i d l e s p e e d s c r e w i n o r o u t t o s e c u r e s p e c i f i e d
A VS SERIES
Gener al Information P arag raph .
CARBUR ETOR
INDEX Page A u t o m a t i c C h o k e ( w e lll l t y p e ) C a r b u r e to r A d j u s t m e n t s A c c e l e r a t o r r P u m p an d B o w l V e n t . . . . A i r V a l v e S e c o n d a r y B o w l V e n t V al al v e C h o k e e V a c u u m K i c k id e O p e n K i c k ) C h o k e e U n l o a d e r ( W id F a s t I d l e C a m P o s i t i o n F a s t I d l e S p e e d (On V e h i c l e )
GENERAL
1 33 . . . . 3 4 - 3 5 35 35 33 34 33 35
Page I d l e S p e e d S e c o n d a r y T h r o t t l e L e v e r S e c o n d a r y T h r o t t l e L o c k o u t . . C l e a n i n g C a r b u r e t o r P a r t s
—
C l o s e d C r a n k c a s e V e n t S y s t e m . . ..(( E n g i n e G r o u p ) D i s a s s e m b l i n g C a r b u r e t o r G e n e r a l I n f o r m a t i o n I n s p e c t i o n an d R e a s s e m b l y S p e c i f i c a t i o n s ..
35 34 35 1 28 26 30 66
INFORMATION
3 8 3 C u b i c Inch
s i o n . T h i s c a r b u r e t o r i s a l s o e q u i p p e d w i t h a hot i d l e
Engine
Th e Car ter four
bar rel
carb uretor
m o d e l s C . A . S .
( C l e a n e r A i r S y s t e m ) A V S - 4 7 3 6 S an d A V S - 4 7 3 2 S ar e 383 83 c u . i n. e n g i n e s w h e n t h e v e h i c l e s ar e u s e d on the 3
e q u i p p e d w i t h a u t o m a t i c
tran sm issio ns. AV S-4732S
i s u s e d o n v e h i c l e s w i t h ai r c o n d i t i o n i n g o n l y , and is
c o m p e n s a t o r r v a l v e , as A V S - 4 7 3 2 S a b o v e . ( F i g . 1). A l l of t h e s e c a r b u r e t o r s a r e e q u i p p e d w i t h a d i s t r i b utor
gro und
switc h, wh ich
r e t a r d s t h e d i s t r i b u t o r
w h e n t h e c a r b u r e t o r i s at c u r b i d l e, e , f o r b e t t e r e m i s s i o n c o n t r o l .
e q u i p p e d w i t h a ho t i d l e c o m p e n s a t o r v a l v e . T h i s v a l v e i s a t h e r m o s t a t i c a l l y o p e r a t e d ai r b l e e d , t o r e l i e v e a n o v e r r i c h c o n d i t i o n at i d l e . T h i s c o n d i t i o n i s t h e
4 4 0 C u b i c Inch
r e s u l t of e x c e s s i v e h e a t an d r e s u l t a n t o v e r r i c h
( C l e a n e r A i r S y s t e m ) A V S - 4 7 3 7 S , A V S - 4 7 3 8 S and
mix
Carter
Engine b a r r e l c a r b u r e t o r m o d e l s C . A . S .
A V S - 4 7 4 1 S ar e u s e d o n t he 4 440 40 c u . i n. e n g i n e s w h e n
t u r e s s ( F i g . 1). The
T h e C a r t e r f o u r
four
bar rel
carb uretor
m o d e l E . C . S .
t h e v e h i c l e s ar e e q u i p p e d w i t h a s t a n d a r d o r a u t o
( E v a p o r a t i o n C o n t r o l S y s t e m ) A V S - 4 7 3 4 S i s u s e d w h e n
matic
t r a n s m i s s i o n r e s p e c t i v e l y . A V S - 4 7 4 1 S i s u s e d
t h e v e h i c l e i s e q u i p p e d w i t h a n a u t o m a t i c t r a n s m i s
w i t h ai r c o n d i t i o n i n g
o n l y and has a hot i d l e c o m -
-AVS—FUEL
CHOKE VALVE CHOKE
VA LV E
14-27
ACCELERATOR P PU UMP PLUNGER STEM ACCELERATOR PUMP ROCKER
ACCELERATOR PUMP ROCKER
S Y S T E M
RM
STEP-UP PISTON COVER
S T E P -UP PISTON
PLATE (2)
COVER PLATE (2)
CHOKE VACUUM DIAPHRAGM DISTRIBUTO VACUUM ADVANCE TUBE FITTING NG
BOWL VENT V A L V E A R M
FUEL INLET
'F FITTI ITTING
TUBE
CLOSED CRANKCASE VENT TUBE FITTING NG
CHOK KE E CONTROL . FAST IDLE ' ^CONNECTOR ' DIAPHRAGM LINK LI \A FAST IDLE
LEVER
C
H
Q
K
THROTTLE LEVER ACCELE RATOR ^-.P PUMP UMP ROD (CENTER HOLE)
VENT VENT VALVE
BOWL
'
ARM
E
CURB IDLE SPEED ADJUSTING SCREW
R OD
p*CAM
UNLOADER
AC LE TO R TANG THROTTLE PC UEM PRA R OD THROTTLE LEVER ^ R S X 4 BODY FAST IDLE SPEEDC — — / DIAPHRAGM ACCELERATOR O NN— ECTOR LINK ADJUS USTIN NG G IDLE MIXTU TURE ADJ ADJUSTING SCREW „ / PUMP ROD CHOKE VACUUM HOSE SCREW LIMITER ER CAPS ACCELERATOR PUMP VACUUM CURB IDLE SPEED PLUNGER STEM DIAPHRAGM DISTRIBUTOR VACUUM ADJUSTING SCREW TUBE FITTIN NG G ADVANCE CARBURETOR ASSEMBLY A AV VS C C.A .A.S. .S. ACCELERATOR PUMP STEP-UP PISTON CHOKE CHOKE VALVE PLUNGER STEM COVER PLATE (2) VALVE ACCELERATOR PUMP BOWL VENT VALVE R O C KER ARM ACCELERATOR (CHECKING OP OPENI ENING) A I R VA L VE PUMP PLUG VEN ENT VALVE BOWL V THROTTLE ROCKER ARM TUBE FITTING NG LEVER FUEL IN NL LET TU B E FI T TTI TI N NC C ; FUEL IN NL LET / CURB IDL DLE CHOKE > '^TUBE FITTING LEVER S *J CHOKE CONTROL LE VE R " — Vj ACCELERATOR . ADJUSTING PUMP ROD BOWL VENT VALVE ^ DISTRIB BUT UTOR TUBE FITTIN NG G THROTTLE G R O UN D CHOKE LEVER S WI T TC C H DIAPHRAGM LINK ^ TERMINAL AIR CLEANER TO TO CLOSED CARBURETOR C RANKCASE CURB IDL DLE V E N T TUBE BOWL VENT VALVE D I S T R I B U T O R \ \ VENT TUBE SPEED OPERATING VACUUM \ \ FITTING L EV E ADJUSTING ADVANCE \\ SCREW TUBE FITTING \ •/ VACUUM FAST IDL DLE I D L E M IXTUR XTURE FAST IDL DLE CONNECTOR ROD ADJUS TI NG SCREW j DIAPHRAGM SPEED LIMITER CAPS ADJUSTIN NG G BOWL VENT VALVE SCREW CHOKE UNLOADER TANG OPERATING LEVER TO ADJ ADJUS UST) (BEND TO ADJUST (BEND TO
IDLS EC M IXTU T L URIM EIT A NG G CATI PSN REW E ER RDJUS
J
:>
S P
E E
D
h
CARBURETOR ASSEMBLY A AV VS E.C.S. F i g . I—Carburetor Assembly
PY726
1 4 -2 8
FU EL
SY ST EM —A VS
p e n s a t o r valve, a s d e s c r i b e d
The
C arter
A t e n d s t o o v e r c o m e t h e
prev ious ly. (Fig. 1).
f o u r b a r r e l c a r b u r e t o r models E.C.S.
(Evaporation
C o n t r o l System) A V S - 4 7 3 9 S S a n d A V S -
4 7 4 0 S S a r e u s e d o n t h e 4 4 0 c u . i n . engines w h e n re vehicles a re
e q u i p p e d w i t h s t a n d a r d
or
the
autom atic
air
the air val ve, per m itti ng
valve
sprin g attached
to
the air valve to pos ition its
s e l f a c c o r d i n g t o e n g i n e r e q u i r e m e n t s .
T h e A V S
((a air
valve
second ary) carburetor
con
t a i n s m a n y f e a t u r e s , s o m e o off w h i c h a r e t h e l o c a t i o n s
t r a n s m i s s i o n s r e s p e c t i v e ly l y . These t w o c a r b u r e t o r s a r e
for th e step-up
also e q u i p p e d w i t h a h o t IId d l e c o m p e n s a t o r valve a s I s AVS-4741S above. ( F i g . I ) .
p i s t o n s a n d s p r i n g s a r e a c c e s s i b l e f o r s e r v i c e w i t h o u t rem ovi ng the air ho rn or the car bur etor from the
These five A V S
carburetors
are
e q u i p p e d w i t h a
rods
e n g i n e . T h e p r i m a r y
and
pisto ns. Th e step-up rod s,
venturi
assemblies are replace
d i s t r i b u t o r g r o u n d s w i t c h , w h i c h r e t a r d s t h e d i s t r i b
able and contain man y of the calibr ation points fo r
u t o r w h e n t h e c a r b u r e t o r I s a t i d l e , f o r b e t t e r
b o t h t h e h i g h a n d l o w s p e e d s y s t e m . O n e f u e l
em is
bow l
s i o n c o n t r o l . T h e i d l e speed s o le le n o i d w h i c h i s m o u n t e d
f e e d s b o t h t h e p r i m a r y a n d s e c o n d a r y n o z z l es es o n t h e
g . 2 1 ) i s u s e d t o m a i n t a i n a o n t h e s e e c a r b u r e t o r s , ( F i g.
rig ht sid e wh ile the other fue l bo wl takes care of th e
higher
I d l e speed w h e n
t h e vehicle i s r u n n i n g a n d
pri m ary
a n d s e c o n d a r y n o z z l e s o n t h e l e f t s i d e . T h i s
a l l ow o w s t h e t h r o t t l e t o close t o a l o w I d l e speed t h r o t t l e
provides improved
p o s i t i on o n w h e n t h e I g n i t i o n k e y i s t u r n e d of o f ff,, t o p r e v e n t
s t o p s a n d a c c e l e r a t i o n .
in
cornering , quic k
A ll the ma jor cast ings of the carbu retor are alum i
" a f t e r r u n n i n g . " ce d u r e s , a r e Since t h e service p r o ce
ide nt ical
on
all
Ca rter AVS carburetors, the Illustrat ions show ing the various disassem bly
p r o ccee d u r e s w i l l n o t a l w a y s
show
t h r o t t l e valves o f
n u m , w i t h
the seconda ry
ha lf
o off
th e
t h e t h r o t t l e b o d y c a s t i n t e g r a l
with
the
ma in body. Thi s allows an overall heigh t reduc tion in the carb ureto r. Th e section con tainin g the accelerato r pu mp
an y one sp pee c i f ic ic c a r b u r e t o r . The
perform ance
is term ed
the pr im ary
s ide of the c arbu retor .
T h e r e a r s e c t i o n i s t h e s e c o n d a r y . T h e f iivv e c o n v e n
c a r b u r e t o r a re r e m e c h a n i c a l l y co co n n e c t e d t o t h e p r i m a r y
t i o n a l s y s t e m s u s e d i n p r e v i o u s f o u r b a r r e l c a r b u r e t
valves a n d
o r s a r e a l s o u s e d i n t h i s u n i t . T h e
o p e n w i t h t h e p r i m a r y a f t e r
an
approxi
f iivv e c o n v e n t i o n a l
m a t e 6 0 ° l a g ; a n d c o n t i n u e t o o p e n u n t i l b o t h p r i m a r y
o a t s y s t e m s , t w o l o w s p e e d s y s t e m s , s y s t e m s a r e , t w o f llo
and
(prim ary
seco on ndary
t h r o t t l e valves r e a c h
the w ide
open
s ide
only)
p o s i t i o n s i m u l t a n e o u s l y . A s engine speed Increases,
a c c e l e r a t o r p u m p
t h e forces e x e r t e d
c o n t r o l s y s t e m .
by the velocity of in ta ke air dow n
two
hig h
sys tem and
s p e e d s y s t e m s , o n e one automatic
ch oke
t h r o u g h t h e V e n t u r i s o f t h e c a r b u r e t o r Increases a n d
SERVICE PROCEDURES DISA SSEMB LING CAR BUR ETOR
(F ( F ig i g 1)
(7) R e m o v e v a c u u m d i a p h r a g m a n d b r a c k e t a s s e m bly and p lac e to one sid e to be cl ean ed as a sp ec ial
(1 ) P l a c e c a r b u r e t o r a s s e m b l y o n r e p a i r s t a n d T o o l C - 3 4 0 0 o r T - 1 0 9 - 2 8 7 S e l e v a t i n g l e g s . T h e s e t o o l s a r e u s e d t o p r o t e c t t h r o t t l e v a l v e s f r o m d a m a g e a n d t o prov ide a suitable base for wo rki ng . (2 ) R e m o v e h a i r p i n c l i p t h a t a t t a c h e s f a s t i d l e c o n n e c t o r r o d t o f a s t i d l e c a m . D i s e n g a g e r o d f r o m
item. A
liquid
clean er may
damag e diaphrag m
terial. ( 8 ) R e m o v e s c r e w s t h a t a t t a c h i d l e s o l e n o i d b r a c k e t a n d s o l e n o i d t o a i r h o r n a n d m a i n b o d y . R e m o v e s o l e -
c am
•
fro m cho ke operating le ver. n e c t o r r o d
hairp in
in cen ter hole
D i s e n g a g e r o d f r o m
mov e from (4)
c lip
that
S T E P
STEP UP PISTON SPRING
h o l d s t h r o t t l e c o n
of acc elerato r pu mp
UP
PISTON AND METERING ROD
then s wi ng rod at an arc unt il it ca n be diseng aged (3 ) R e m o v e
ma
arm .
a r m a n d t h r o t t l e l e v e r , t h e n r e
carbur etor.
R e m o v e s c r e w s a t t a c h i n g s t e p - u p p i s t o n a n d r o d
in g e err t o p r e v e n t c o v e r p l a t e s . H o l d c o v e r d o w n w i t h a f in piston
and rods
from
f l y i n g o u t . L i f t o ffff p l a t e s
and
s l i d e s t e p - u p p i s t o n s a n d r o d s o u t o f a i r h o r n , ( F i g . 2 ) . R e m o v e s t e p -u -u p p i s t o n s p r i n g s .
(5 ) R e m o v e v a c u u m h o s e b e t w e e n c a r b u r e t o r
t h r o t
tle body and vac uu m diaph ragm . (6) R e m o v e c l i p f r o m c h o k e o p e r a t i n g l i n k a n d d i s engage
lin k
fro m
c h o k e l e v e r . ( F i g . 1 ) .
dia phr agm
plu ng er
(ste em m)
and
SCREW C OV E R
PLATE
3
STA GE
M E T E R I N G
F i g . 2— Removing or install ing Pistons a n d Rods
ROD NR513A
Step Step-Up -Up
A VS —F UE L SY ST EM
A
n o i d a s s e m b l y f r o m c a r b u r e t o r . ((II f s o e q u i p p e d . ) (9 ) R e m o v e
e i g h t s c r e w s that a t t a c h
air
ho rn
-**\
to
m a i n b o d y . L i f t a i r h o r n s t r a i g h t u p a n d a w a y from
PRIMA3Y
main body. Wh en
VEK . UR;
not
to
ben d
or
rem ov ing dam age
air horn , use car e so as
f lo lo a att ss..
Rem ov e ac cel erato r
pump, plung er lower
s p r i n g f r o m p u m p
(1 100 ) R e m o v e h o t
co mp ens ator
idle
s o e q u i p p e d ) .
Disassembling
Air
c ylinder.
and
gasket
G
A
5
;
<
; '
A C C E L E R A O R PUMP T
/
/
JET H O U SI N G
^
DISCHARGE
'
CLUSTH (PUMP SIDE* h > , f r
1 4 -2 9
JT
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L ; ^
.
f ] N
PASSA GE
PRI PRIMARY MARY VENTURI
,
CLUSTER
I CH OK E
SIDE)
1
( iiff
Horn
P l a c e a i r h o r n i n a n i n v e r t e d p o s i t i o n o n b e n c h (t o
p r o t e c t t h e f lo lo a att s) s) t h e n p r o c e e d t o d i s a s s e m b l e a s f o l
\
lows:
( 1 ) U s i n g a s u i t a b l e t o o l , r e m o v e float f u l c r u m p i n s ,
INTAKE CHECK BALL ASSEMBLY
(left a n d r i g h t ) t h e n l i f t float u p a n d o u t o f b o s s e s o n
a i r h o r n . I t i s s u g g e s t e d that t h e float o n t h e s i d e b e m a r k e d
s o t h a t f l oa o a ttss
c an be rei ns tal led
in
their r espec tive positions . ( 2 ) R e m o v e t w o n e e d l e v a l v e s f r o m t h e i r r e s p e c t i v e s e a t s , a f t e r m a r k i n g o n e o n p u m p
side for identifica
t i o n . U s i n g a w i d e b l a d e s c r e w d r i v e r , r e m o v e n e e d l e v a l v e s e a t s . B e s u r e e a c h n e e d l e v a l v e i s r e t u r n e d i t s o r i g i n a l s e a t a t r e a s s e m b l y .
to
(3 ) R e m o v e s h o u l d e r s c r e w a n d s p r i n g h o l d i n g a c c e l e r a t o r p u m p r o c k e r a r m a n d b o w l v e n t a r m t o a i r
h o r n ( C . A . S . ) . R e m o v e a r m s a n d d i s e n g a g e p u m p
link
f r o m p u m p s t e m . S l i d e a c c e l e r a t o r p u m p p l u n g e r a n d
s p r i n g o u t o f a i r h o r n . R e m o v e g a s k e t .
(4 ) P l a c e a c c e l e r a t o r
pum p
p lun ger
in
a
NR514
p um p
jar
of
c l e a n g a s o l i n e o r k e r o s e n e , t o p r e v e n t l e a t h e r from
drying out. ( 5 ) R e m o v e f u e l i n l e t fitting a n d filter s c r e e n f r o m a i r h o r n .
(6 ) T e s t f r e e n e s s o f c h o k e m e c h a n i s m i n a i r h o r n . T h e c h o k e s h a f t m u s t float f r e e t o o p e r a t e c o r r e c t l y .
I f c h o k e s h a f t s t i c k s i n b e a r i n g a r e a , o r a p p e a r s t o b e
F i g . 3—Rem oving
or installing Pum p Jet Housing
Accelerator
changeable, side for side and must be reinstalled in their original locations at reassembly. ( 5) 5) U s i n g T o o l T - 1 0 9 -5 - 5 9 , s c r e w d r i v e r b i t , a c c e l e r a t o r p u m p
i ntake
rem ove
ch eck valve located
insid e
fuel bow l, adjac ent to acc elerator pu mp cy lind er. ( 6 ) R e m o v e p l a s t i c l i m i t e r c a p s f r o m i d l e t u r e s c r e w s . ( B e s u r e a n d
air
mi x
count nu m ber of tur ns to
s e a t t h e s c r e w s ( f r o m s t o p ) , a s t h e s a m e n u m b e r
of
t u r n s ( f r o m s e a t ) m u s t b e m a i n t a i n e d a t i n s t a l l a t i o n . ) R e m o v e s c r e w s a n d s p r i n g s f r o m t h r o t t l e b o d y . T h e c a r b u r e t o r n o w h a s b e e n d i s a s s e m b l e d i n t o t w o u n i t s , n a m e l y a i r h o r n a n d t h e m a i n a n d t h r o t t l e b o d y c a s t i n g . T h e c o m p o n e n t p a r t s o f e a c h h a v e b e e n d i s
a s s e m b l e d a s f a r
a s n e c e s s a r y f o r
clean ing and
in
spection.
I t i s u s u a l l y n o t a d v i s a b l e t o r e m o v e t h e throttle s h a f t s o r v a l v e s u n l e s s w e a r o r d a m a g e n e c e s s i t a t e s
i n g w i l l b e r e q u i r e d .
the installatio n of new parts. Du ri ng the m anu fac tur e of the car bu ret or, the locatio n of the idle tran sf er
M ai n
). f u l l y e s t a b l i s h e d f o r o n e p a r t i c u l a r a s s e m b l y , ( F i g . 6 ).
g u m m e d f r o m d e p o s i t s i n a i r h o r n , a t h o r o u g h c l e a n
(1)
Body
ports an d the idle disc harg e ports to the valve is car e
D i s as s eem mbly
R e m o v e s c r e w s t h a t a t t a c h a c c e l e r a t o r p u m p
jet
h o u s i n g to to m a i n b o d y . L i f t o u t j e t h o u s i n g a n d g a s k e t ( F i g . 3 ). ). D i s c a r d g a s k e t . N o w , i n v e r t m a i n b o d y
:CIAL T O O L
Yl
and
d r o p o u t d i s c h a r g e c h e c k n e e d l e f r o m d i s c h a r g e p a s
f
sage.
(2 ) U s i n g T o o l T - 1 0 9 - 5 58 8, rem ov e m ain mete rin g jets
6
( p r i m a r y s i d e ) , ( F i g . 4 ) . T h e primary a n d secondary
main metering jets are not interchangeable. It is very important that these jets be installed in their r e s p e c t i v e l o c a t i o n s i n t h e m a i n b o d y a t r e a s s e m b l y . (3) A g a i n u s i n g T o o l T - 1 100 9 -5 -5 8 , r e m o v e m a i n i n g j e t s ( s e c o n d a r y s i d e ) , ( F i g . 4 ) . R e m o v e
meter in tak e
check.
(4)
R e m o v e s c r e w s t h a t a t t a c h
( c h o k e a n d
pu mp
side) to
ma in
prim ary
ventu ri
body. L ift
ven tur i
C H E G C ASSEMBLY
ACCE--:RA~OR
"
MAIN
iMETERING
PU.v.P W r L L
JET SECONDARY (2)
MAIN METERING' J ET PRIMARY (2) I N T A K E C H 5 C K
SSlWVy
'>
NR515
s t r a i g h t u p a n d a w a y f r o m m a i n b o d y , ( F i g . 5 )).. D i s assemblies mblies a r e c a r d g a s k e t s . T h e ventur i asse
n o t inter-
F i g . 4—Rem oving or Installing
Main Me Metering tering
Jets
14-30 14-30
FUEL
SYSTEM—AVS AVS Th e prim ary
GASKET
v a l v e s a n d s e c o n d a r y v a l v e s a r e n o t
i n t e r c h a n g e a b l e an d s h o u l d b e k e p t s e p a r a t e i n o r d e r
PRIMARY VENTURI CLUSTER £ (UMP SIDE)
t h a t e a c h m a y b e r e t u r n e d t o i t s r e s p e c t i v e
bore
( F i g . 7).
D
-PRIMARY VENTURI
CLUSTER
* (CHOKE SIDE)
INSPECTION TION AN AND D (1 ) S l i d e
p r i m a r y t h r o t t l e v a l v e (o r v a l v e s )
o u t . H o l d v a l v e s i n p l a c e w i t h f i n g e r s . ( F i n g e r s p r e s s
SCREWS
i n g o n h i g h s i d e o f v a l v e s . ) (2 ) T a p v a l v e s s c r e w s s e c u r e l y .
NR516 Pr i m a r y
l i g h t l y i n t h i s
( 3 ) I n s t a l l i d l e m i x t u r e s c r e w s an d s p r i n g s i n t h r o t
new idle mix ture
I f n e w t h r o t t l e s h a f t s s h o u l d be i n s t a l l e d i n a n o l d
m u s t b e s t r a i g h t a n d
p o r t i o n i s g r o o v e d o r r i d g e d , a
s c r e w s h o u l d b e i n s t a l l e d t o i n s u r e
havin g correct idle mixture
c o n t r o l . ) DO NOT USE A
w o r n b o d y , i t w o u l d b e v e r y u n l i k e l y t h a t t h e o r i g i n a l
S C R E W D R I V E R . . T u r n s c r e w s l i g h t l y
r e l a t i o n s h i p o f t h e s e p o r t s t o t h e v a l v e s w o u l d b e o b
s e a t s w i t h f i n g e rs rs .
t o t h e v a l v e s w o u l d retor
operation ,
adversely
a aff f e ecc t
relationship
no rm al
c arbu
b e t w e e n t h e s p e e d s o f 15 an d 30
tighten
S t a k e s c r e w s s b y s q u e e z i n g w i t h
t l e b o d y . ( T h e t a p e r e d p o r t i o n
T h e v a l v e s a r e m i l l e d t o g i v e p r b p e r p o r t r e l a t i o n .
position,
pliers.
s m o o t h . I f t a p e r e d
t a i n e d . A v e r y s l i g h t c h a n g e i n t h e p o r t
in to
t h e i r r e s p e c t i v e b o r e s , i n s t a l l n e w s c r e w s , b u t d o n o t t i g h t e n . B e s u r e i d l e s p e e d a d j u s t i n g s c r e w i s b a c k e d
ATTACHING
Fig. 5—Removing or I n s ttal al l i n g Venturi Cluster
REASSEMBLY
against
th eir
B a c k o f f t h e n u m b e r o f t u r n s
c o u n t e d at d i s a s s e m b l y . I n s t a l l n e w p l a s t i c c a p s w i t h t a b a g a i n s t s t o p s . T h i s s c r e w h a s a l e f t h a n d
thread .
T u r n c o u n t e r c l o c k w i s e ( R i c h e r ) a n d c l o c k w i s e ( L e a n er).
m i l e s p er h o u r . e x c e s s i v e l y w o r n , t h a t a n e w c a r b u r e t o r b e i n s t a l l e d .
(4 ) B e s u r e all the m e t e r i n g h o l e s an d v e n t t u b e s are clean, in the primary primary venturi. venturi. P l a c e n e w p r i m a r y
H o w e v e r , i f t h e t h r o t t l e v a l v e s h a v e b e c o m e n i c k e d ,
ven turi
g a s k e t s i n p o s i t i o n , t h e n
b u r r e d o r d a m a g e d , n e w v a l v e s m a y b e i n s t a l l e d , p r o
venturi
( p u m p a n d c h o k e s i d e ) b y l o w e r i n g
v i d i n g t h e f o l l o w i n g
d o w n o n g a s k e t s ( F i g . 5). I n s t a l l a t t a c h i n g s c r e w s a s a n d
It i s r e c o m m e n d e d t h a t i f t h e t h r o t t l e s h a f t s a r e
i n s t r u c t i o n s a r e c a r e f u l l y
fol
i n s t a l l t h e p r i m a r y straight
l o w e d . T h e s c r e w s t h a t a t t a c h th e t h r o t t l e v a l v e s are
tighten sec urely .
removal so a s no nott to break t he screws in the t h r o t t l e
j e t s , u s i n g
the s c r e w s w i t h a s h a f t . R e m o v e th e s t a k e d p o r t i o n of of the
cu rely. Install intak e chec k.
file. R e m o v e t h e s c r e w s t h a t a t t a c h t h e p r i m a r y t h r o t t l e
(6 ) I n s t a l l a c c e l e r a t o r p u m p i n t a k e c h e c k b a l l u s i n g Tool T-109-59.
s t a k e d on the o p p o s i t e s iidd e a n d c a r e s h o u l d be u s e d in
v a l v e s t o t h e t h r o t t l e s h a f t an d s l i d e v a l v e (o r v a l v e s ) o u t o f b o r e s .
(5)
I n s t a l l p r i m a r y a n d s e c o n d a r y
main
metering
T o o l T - 1 009 9 --5 5 8 . ( F i g . 4 . ) T i g h t e n
j e t s s e
(7) I n s t a l l h o t i d l e c o m p e n s a t o r a n d g a s k e t (if so
e q u i p p e d ) . T i g h t e n s c r e w s s e c u r e l y .
R e m o v e t h e s c r e w s t h a t a t t a c h t h e s e c o n d a r y t h r o t tle
v a l v e s t o t h e t h r o t t l e s h a f t a n d s l i d e
v a l v e (o r
v a l v e s ) o u t o f b o r e s .
(1 ) P o u r
' /-
SPARK ADVA AN NG PORT IDU; DISCH A R O P O R I IS S PRIMARY THRO n i l VALVf S r
Pum p clean
Test
gasoline into
car bu reto r
b o w l (ap-
SECONDARY VALVE
PRIM MA ARY VAL VA LVE
S E C O N D A R Y , .^4T H R o r m * VALVES
Accelerator
M l . HAi
» H R :*o
Fig. 6 — Po r t s in Relation to Throttle
»;:,
KF946C
HM 7
Va lves
Fig. 7—Th rottle Va lve
Identification
A
A V S — F U E L S Y S T E M
p r o x i m a t e l y 1/ 2 i n c h d e e p )).. R e m o v e a c c e l e r a t o r p u m p p l u n g e r f r o m j a r o f g a s o l i n e . F l e x
leather
sev eral
t i m e s , t h e n s l i d e i n t o p u m p c y l i n d e r .
T h e c a r b u r e t o r s ar e e q u i p p e d w i t h s y n t h e t i c
rub
b e r t i p p e d f u e l i n l e t n e e d l e s . T h e n e e d l e t i p i s a r u b b e r m a t e r i a l w h i c h i s n o t a f f e c t e d b y g a s o l i n e and i s
(2) I n s t a l l a c c e l e r a t o r p u m p d i s c h a r g e c h e c k n e e d l e i n d i s c h a r g e p a s s a g e . R a i s e p u m p
14-31
p l u n g e r a n d p r e s s
s t a b l e o v e r a w i d e r a n g e o f t e m p e r a t u r e s . T h e t i p i s
flexible
e n o u g h t o m a k e a g o o d s e a l o n t h e n e e d l e
l i g h t l y o n p l u n g e r s h a f t t o e x p e l ai r f r o m p u m p p a s
s e a t , a n d t o g i v e i n c r e a s e d r e s i s t a n c e t o f lo o d in g .
s a g e s . U s i n g a s m a l l c l e a n b r a s s r o d , h o l d d i s c h a r g e c h e c k n e e d l e f i r m l y o n i t s s e a t . A g a i n r a i s e p l u n g e r
T h e u se of new i n l e t n e e d l e s r e q u i r e t h a t c a r e b e u s e d w h e n m a k i n g float a d j u s t m e n t s . A v o i d a p p l y i n g
a n d p r e s s d o w n w a r d . No f u e l s h o u l d b e e m i t t e d f r o m
a n y p r e s s u r e o n t h e fl f l o at at s w h i c h m i g h t c o m p r e s s th e
e i t h e r t h e i n t a k e o r d i s c h a r g e p a s s a g e .
t i p o f t h e f u e l
(3 ) If f u e l d o e s e m i t f r o m i n t a k e p a s s a g e , r e m o v e i n t a k e c h e c k b a l l an d r e c l e a n t h e p a s s a g e . F u e l l e a k a g e at d i s c h a r g e c h e c k n e e d l e i n d i c a t e s p r e s e n c e of d i r t o r a d a m a g e d
ch eck needle.
C l e a n a g a i n and
t h e n i n s t a l l a ne w c h e c k n e e d l e . R e t e s t f o r l e a k a g e . (4 ) If e i t h e r
intake
c h e c k a s s e m b l y o r d i s c h a r g e
c h e c k n e e d l e l e a k s a f t e r
a b o v e t e s t an d s e r v i c e fix,
a t t e m p t t o r e s e a t as f o l l o w s :
inlet
n e e d l e s . The tip can be com
pressed sufficiently to cause a f a l s e s e t t i n g which will
a f f e c t c o r r e c t l e v e l of f u e l in the b o w l . (4)
P l a c e a new ai r h o r n t o m a i n
body
g a s k e t i n
p o s i t i o n o n a i r h o r n , t h e n i n s t a l l float n e e d l e
valv e
s e a t s . (Be s u r e e a c h n e e d l e s e a t a n d n e e d l e i s r e i n
s t a l l e d i n i t s o r i g i n a l p o s i t i o n . )
( 5 ) S l i d e r i g h t an d l e f t f lo l o at at s
into
p o s i tio n i n air
h o r n , t h e n i n s t a l l float f u l c r u m p i n s . (Be sure marked
float i s i n sta l l e d on p u m p s i d e of the air h o r n . ) See
I n t ak e
C h e cckk
disassembly procedures.
B al l
R e m o v e t h e i n t a k e c h e c k a s s e m b l y f r o m t h e t h r o t
t l e b o d y . In I n s t a l l a new c h e c k a s s e m b l y , t h e n r e t e s t as ( F i g . 4). d e s c r i b e d p r e v i o u s l y (F
Discharge
Check
Float
f llo o at at s
h ave
been
inst alle d,
c h e c k float
Alignm ent
Sett Setting ing
( 1 ) S i g h t d o w n s i d e of e a c h float s h e l l t o d e t e r m i n e
Needle
(1 ) W i t h d i s c h a r g e c h e c k
( 6) 6) A f t e r
a l i g n m e n t , l e v e l a n d d r o p s e t t i n g s a s f o l l o w s :
needle installed, insert
a p i e c e of d r i l l r o d d o w n o n n e e d l e . L i g h t l y t ap d r i l l
r o d w i t h a h a m m e r t o f o r m a new s ea ea t . R e m o v e a n d d i s c a r d o l d n e e d l e an d i n s t a l l a new one. R e t e s t as
d e s c r i b e d p r e v i o u s l y . If s e r v i c e fix d o e s n o t c o r r e c t
t h e c o n d i t i o n , a new c a r b u r e t o r w i l l h a v e t o b e i n stalled.
i f s i d e o f t h e float i s p a r a l l e l t o o u t e r c a g e o f a i r h o r n c a s t i n g , (Fi g. 8).
(2 ) If s i d e s of float a r e n o t i n a l i g n m e n t w i t h e d g e o f c a s t i n g , b e n d float l e v e r b y a p p l y i n g p r e s s u r e t o e n d of float s h e l l w i t h t h u m b . To avoid damage to
t h e f l o a t , a p p l y o n l y e n o u g h p r e s s u r e to b e n d the f l o at l e v e r .
c hec k
( 3 ) A f t e r a l i g n i n g f l o a t s , r e m o v e as m u c h c l e a r a n c e
n e e d l e , j et h o u s i n g an d g a s k e t . In I n s t a l l h o u s i n g and
a s p o s s i b l e b e t w e e n a r m s of float l e v e r an d l u g s o f a i r
a t t a c h i n g s c r e w s . T i g h t e n s c r e w s s e c u r e l y .
h o r n . To do t h i s , b e n d float l e v e r . T h e a r m s of float
(2 ) I n s t a l l
acc elerator
pu mp
disc harg e
(3 ) P r e s s d o w n o n a c c e l e r a t o r p u m p p l u n g e r s h a f t , a n d as p l u n g e r i s b e i n g d e p r e s s e d , a c l e a r
straig ht
s t r e a m s h o u l d em e m i t f r o m e a c h j et. I f s t r e a m s ar e not i d e n t i c a l , (i f e i t h e r one i s d i v e r t e d o r r e s t r i c t e d ) a
n e w a c c e l e r a t o r p u m p j e t h o u s i n g s h o u l d b e i n s t a l l e d . Af ter
test, pou r
g a s o l i n e f r o m c a r b u r e t o r b o w l and
Ai r
f a c e s of l u g s o f c a s t i n g .
Setti ng F f o c i f Level (1 ) W i t h ai r h o r n i n v e r t e d , ai r h o r n g a s k e t i n p l a c e THESE SURFACES —
MUST BE PARALLEL WITH EDGE OF C A S T I N G
remov e pum p plun ger.
Assembling
l e v e r s h o u l d be as p a r a l l e l as p o s s i b l e t o i n n e r s u r
Horn
( 1 ) S l i d e f u e l i n l e t s c r e e n i n t o f u e l l i n e fitting, t h e n i n s t a l l i n a i r h o r n . T i g h t e n s e c u r e l y .
( 2) 2) C h e c k t o s ee if l e a t h e r o n a c c e l e r a t o r
pum p
p l u n g e r i s h a r d , c r a c k e d o r w o r n . I f any s i g n of w e a r o r d e t e r i o r a t i o n i s e v i d e n t , i n s t a l l a new p l u n g e r as s e m b l y . I n s t a l l p u m p l i n k .
( 3 ) P l a c e p u m p a r m i n p o s i t i o n o v e r b o s s of ai r h o r n an d e n g a g e p u m p l i n k . IIn n s t a l l b o w l v e n t a r m in
position over
p u m p a r m . S l i d e s p r i n g o v e r
s c r e w an d i n s t a l l
through
pivot
a r m s an d b o s s . B e s u r e
s h o u l d e r o f s c r e w e n t e r s a r m s . T i g h t e n s e c u r e l y . E n
g a g e e n d s of s p r i n g w i t h t a n g o n v e n t a r m an an d p i n o n a i r h o r n . C h e c k f o r p r o p e r o p e r a t i o n .
V A L V E SPRIN G
PY727 PY727
F i g . 8 —Che c king F l o a t Alignment
1 4 -3 2
FU EL
a n d float n e e d l e
SYST EM —A VS s e a t e d , s l i d e float g a u g e
s p e c i f i c a t i o n s f o r c a r b u r e t o r
being
( r e f e r to
w o r k e d on) be
of t h e float (at o u t e r e n d ) a n d a i r h o r n g a s t w e e n t o p of
k e t , (Fi g . 9). F l o a t
shou ld jus t touc h
gauge
( T -1 -1 0 9 9--
m a n n e r . I f
an ad
107). (2 ) C h e c k
o t h e r float i n s a m e
j u s t m e n t i s n e c e s s a r y , b e n d float a r m u s i n g T o o l T - 10 1 0 9 - 22 2 2 , u n t i l c o r r e c t c l e a r a n c e h a s b e e n o b t a i n e d . A f t e r b e n d i n g a r m , r e c h e c k t h e float a l i g n m e n t .
Float
Drop
Fig. 10—Checking Float Drop
Setting Setting
F l o a t d r o p i s t h e d i s t a n c e t h e f l oa o a ttss m o v e f r o m t h e
intermediate
s p e e d r a n g e . To do t h i s , t h e r e i s a s t e p -
i n v e r t e d ai r h o r n (float l e v e l s e t t i n g p o s i t i o n ) to t he
up
a i r h o r n i n u p r i g h t p o s i t i o n .
a n d p r i m a r y m e t e r i n g j e t s , ( F i g . 11).
(1 ) W i t h ai r h o r n i n v e r t e d ( u p s i d e d o w n ) p l a c e a i r h o r n i n u p r i g h t f lo lo at at s
p o s i t i o n a n d m e a s u r e t h e d i s t a n c e
r o d s w i t h t h r e e
diam eters,
(5 ) S l i d e s t e p - u p p i s t o n s p r i n g i n t o p i s t o n c y l i n d e r s , f o l l o w e d b y s t ep e p - u p p i s t o n s a n d s t e p - u p r o d s . I n s t a l l
position. Th is
c o v e r r p l a t e s a n d a t t a c h i n g s c r e w s w h i l e h o l d i n g s t e p -
m e a s u r e m e n t s h o u l d be 1/2 i n c h ( F i g . 1 0) 0) . A i r h o r n
u p p i s t o n s d o w n i n p o s i t i o n . T i g h t e n s c r e w s s e c u r e l y .
g a s k e t i n s t a l l e d . I f an a d j u s t m e n t i s n e c e s s a r y , b e n d
( 6 ) C h e c k fit of c h o k e v a l v e i n a i r h o r n . T h e v a l v e
stop
m o v e f r o m i n v e r t e d t o u p r i g h t
p i s t o n , n e w m e t e r i n g
t a b s o n float l e v e r s u n t i l
h a s b e e n
corr ect
o b t a i n e d . B e n d t ab t o w a r d
drop
setting
n eedle
s e a t t o
l e s s e n d r o p , o r a w a y f r o m s e a t t o i n c r e a s e d r o p .
(2 ) A f t e r
f lo lo a att s
h ave
bee n
c h e c k e d a n d a d j u s t e d ,
c o n t i n u e t o a s s e m b l e c a r b u r e t o r a s f o l l o w s : (3 ) P l a c e a c c e l e r a t o r p u m p p l u n g e r l o w e r s p r i n g i n p u m p c y l i n d e r , t h e n l o w e r a i r h o r n c a r e f u l l y d o w n o n m a i n b o d y . C a r e m u s t b e t a k e n t o c e n t e r s m a l l b r a s s m a i n b l e e d t u b e s s o t h a t t h e y w i l l p a s s t h r o u g h h o l e s i n a i r h o r n w i t h o u t
b e i n g d a m a g e d . Be sure the fuel
ba ffl es on t h e a i r h o r n , s l id i d e d o w n in f r o n t , ( b o w l s i d e ) o f th e float c h a m b e r b a f f l e s , or the air h o r n w i l l not i n d e x c o r r e c t l y w i t h th e m a i n b o d y a n d can c a u s e the fl oa t s t o h a n g up. Be s u r e th e l e a t h e r on the p l u n g e r d o e s n o t c u r l or w r i n k l e . A c c e l e r a t o r p u m p o p e r a ti ti o n w i l l be a f f e c t e d if t h i s p r e c a u t i o n is not o b s e r v e d . P l a c e c u r b i d l e s o l e n o i d i n p o s i t i o n o n c a r b u r e t o r . I n s t a l l a t t a c h i n g s c r e w s an d t i g h t e n s e c u r e l y . (If so
equipped.) (4)
I n s t a l l a i r h o r n
atta acc h i n g s c r e w s a n d t i g h t e n
road
c h a n g e f r o m l o w s p e e d , b e s t
fuel
eco no my ,
l o a d m i x t u r e s t o r i c h e r w i d e o p e n t h r o t t l e f u l l
power
m i x t u r e s i s n o w a c c o m p l i s h e d i n t w o s t e p s .
T h i s h a s m a d e i t p o s s i b l e t o s e c u r e b e s t l o w s p e e d
fuel economy without
a n d r e p o s i t i o n i f n e c e s s a r y . ( 7 ) E n g a g e t h r o t t l e c o n n e c t o r r o d w i t h h o l e i n t h r o t t l e l e v e r . In In s t a l l o t h e r e n d i n a c c e l e r a t o r
r o c k e r a r m , ( c e n t e r
h o l e ) an d i n s t a l l h a i r p i n
s a c r i f i c i n g p e r f o r m a n c e i n t h e FLOAT
I i OAi /
oAU Oi
p um p c l i p to
secure.
( 8 ) E n g a g e u p p e r e n d o f f a ass t i d l e c o n n e c t o r r o d i n s l o t of c h o k e o p e r a t i n g l e v e r . S w i n g r o d i n a n a r c a n d e n g a g e w i t h f a s t i d l e c a m . S e c u r e w i t h h a i r p i n
installing
Vacuum
c lip.
D i a p h ra g m
I n s p e c t t h e d i a p h r a g m
v a c u u m fitting to be s u r e
t h a t t h e p a s s a g e i s n o t p l u g g e d w i t h f o r e i g n
mat erial.
L e a k c h e c k t h e d i a p h r a g m t o d e t e r m i n e i f i t h a s i n
t e r n a l l e a k s . To do t h i s , f ir i r sstt d e p r e s s t h e d i a p h r a g m s t e m , t h e n p l a c e a f i n g e r o v e r t h e v a c u u m fitting t o s e a l t h e o p e n i n g . R e l e a s e t h e d i a p h r a g m s t e m . I f the (10) s e c o n d s , s t e m m o v e s m o r e t h a n 1 / 1 6 i n c h i n ten (10)
the
l e a k a g e i s e x c e s s i v e a n d t h e a s s e m b l y m u s t b e
r e p l a c e d . . I n s t a l l t h e d i a p h r a g m
securely.
The
s h o u l d b e e v e n l y s p a c e d o n a l l s i d e s . L o o s e n s c r e w s
a s s e m b l y o n t h e c a r
b u r e t o r as f o l l o w s : ( 1 ) A s s e m b l e t o c a r b u r e t o r a n d t i g h t e n
attach ing
s c r e w s s e c u r e l y .
( 2 ) I n s t a l l c h o k e o p e r a t i n g l i n k i n p o s i t i o n diaph ragm
plu nger
(s (s t e em m ) a n d c h o k e
betw een
lever.
Instal l COVER
2 STEPS
STEP-UP PISTON
S P R I N G
2 STAGE STEP-UP
PISTON
SCREW
• N D Of M O A T
Nh\j 9
J E T - N E W TYPE -
NB171A
Fig. 9-Chec 9-Checking king
Float
Fig. 11—Step-Up Piston Rod and J et
Height
-A VS— FU E L
A-
c l i p t o s e c u r e . S e c u r e c h o k e E
lever
e n d w i t h s p r i n g
SYSTE M
1 4 -3 3
d e l i v e r y w h i l e t h e e n g i n e i s r u n n i n g . It It p o s i t i o n s t h e c h o k e v a l v e w i t h i n t h e a i r h o r n b y u s e o f t h e l i n k a g e
clip. ( 3 ) I n s p e c t r u b b e r h o s e f o r c r a c k s , b e f o r e p l a c i n g I t
betw een the ch oke shaft and the diaphrag m. The dia
o n c o r r e c t c a r b u r e t o r fitting. ( F i g . . 1) . D o n o t c o n n e c t
phr agm
t h e v a c u u m h o s e t o t h e d i a p h r a g m f i t t i n g u n t i l
k i c k a d j u s t m e n t . U s e e i t h e r a d i s t r i b u t o r t e s t m a c h i n e
after
m ust
be energized to meas ure the
the vac uu m kick adjus tm ent h as been made. (Se ee e C a r
w i t h a
buretor Adjus tments .)
vehicle. ( 1) 1) I f a d j u s t m e n t i s t o b e m a d e w i t h e n g i n e r u n n i n g ,
CARBURETOR
d i s c o n n e c t f a s t i d l e l i n k a g e t o a l l o w c h o k e t o c l o s e t o
ADJUSTMENTS
v a c u u m s o u r c e , o r
vacu um
va cu um
supplied by
the
k i c k p o s i t i o n w i t h e n g i n e a t c u r b i d l e . I f a n a u x i l i a r y T h e f o l l o w i n g a d j u s t m e n t s s h o u l d b e m a d e w i t h t h e
carb ureto r
on the ben ch
f o r e a s e o f w o r k i n g ,
and,
v a c u u m sou rc e is
(engine not runni ng ) and move cho ke valve to cl ose d (2) W h e n
T h e f a s t
made
Cam
idle engine
Position
b e u s e d , o p e n t h r o t t l e v a l v e s
p o s i t i o n . R e l e a s e t h r o t t l e f iirr st st , t h e n r e l e a s e c h o k e .
s h o u l d b e m a d e i n t h e f o l l o w i n g o r d e r :
Fast Idle Spee Speed d
to to
Adjustment
sp eed adju stm ent
u sin g an
auxiliary
v a c u u m s o u r c e , d i s
c o n n e c t v a c u u m h o s e f r o m c a r b u r e t o r a n d c o n n e c t i t
sh ould
be
to
h o s e f r o m v a c u u m s u p p l y w i t h a s m a l l l e n g t h
of
o n t h e v e h i c l e , a s d e s c r i b e d i n t h e F a s t I d l e
t u b e t o a c t a s a fitting. R e m o v a l o f h o s e f r o m d i a
S p e e d A d j u s t m e n t ( O n V e h i c l e P a r a g r a p h . ) H o w e v e r ,
p h r a g m m a y r e q u i r e f o r c e s w h i c h d a m a g e t h e s y s t e m .
t h e F a s t I d l e C a m P o s i t i o n A d j u s t m e n t c a n b e m a d e
A p p l y a v a c u u m of of 1 100 o r m o r e i n c h e s .
on the benc h.
(3 ) I n s e r t
T h i s a d j u s t m e n t s p e e d s o f
is imp ortan t
each c am
step
t o a s s u r e t h a t t h e
occ ur at the
p r o p e r time
d u r i n g e n g i n e w a r m - u p . A d j u s t as f o l l o w s : on
fast idle
dr ill
(refer
to
Spec ific ation s)
Ap ply
s u f f ic i c i e n t c l o s i n g p r e s s u r e o n lever t o
whi c h
c h o k e r o d a t t a c h e s t o p r o v i d e a m i n i m u m c h o k e v a l v e
(1 ) W i t h f a s t i d l e s p e e d a d j u s t i n g s c r e w c o n t a c t i n g s e c o n d h i g h e s t s p e e d s t e p
sp eci fied
b e t w e e n c h o k e v a l v e a n d w a l l o f a i r h o r n ( F i g . 13 1 3 ))..
c am ,
mov e
opening
without
t h a t o n
mos t
distortion
units, a
o off
diaphragm
cylin deri cal stem
l i n k . Not e extend s
as
c h o k e v a l v e t o w a r d c l o s e d p o s i t i o n w i t h l i g h t p r e s s u r e
an internal spr ing is com pressed. Thi s spring must be
on chok e shaf t lever.
fully com press ed for proper measurem ent of vacu um
(2 ) I n s e r t s p e c i f i e d d r i l l ( r e f e r t o S p e c i f i c a t i o n s ) , b e
k i c k a d j u s t m e n t .
t w e e n c h o k e v a l v e a n d w a l l o f a i r h o r n ( F i g . 1 2) 2) . A n
(4 ) A n a d j u s t m e n t w i l l b e n e c e s s a r y i f a s l i g h t d r a g
a d j u s t m e n t w i l l b e n e c e s s a r y i f a s l i g h t d r a g i s n o t
i s n o t o b t a i n e d a s d r i l l i s b e i n g r e m o v e d . S h o r t e n o r
obtained as the dri ll is bein g rem oved .
lengthen
(3 ) T o a d j u s t , b e n d f a s t i d l e c o n n e c t o r r o d a t a n g l e ,
diaphrag m
link
to
obtain
correc t
ch oke
o p e n i n g . L e n g t h c h a n g e s s h o u l d b e m a d e b y c a r e f u l l y
T - 1 09 0 9 --2 213 unt il c orrec t valve openin g has u s i n g T o o l T-
opening or closing the bend provided in
been obtained (Fig. 12).
l i n k . C A U T I O N : D O
N O T
diaph ragm
A P P L Y T W I S T I N G
OR
B E N D I N G F O R C E T O D I A P H R A G M .
Vacuum K ick Adjustment—(This ma de ON or OFF vehicle.)
test can
be
(5) R e i n s t a l l v a c u u m
T h e c h o k e d i a p h r a g m a d j u s t m e n t c o n t r o l s t h e f u e l
hose
on
correc t
c arbu reto r
CHOKE VALVE
DRILL OR G A U G E DRILL LIGHT C L O S I N G PRESSURE O N • CHOKE LEVER
' DRILL OR G A U G E ;
'
BEND FAST IDLE CONNECTOR ROD AT THIS ANGLE
FAST IDLE
CAM
"CHOKE LEVER SLOT CHOKE LEVER
MINIMUM O F
10 INCHES OF V A C U U M O N D I AP H R AG M REQUIRED
•j
TO VACUUM SOURCE
FAST IDLE SPEED SCREW ON 2ND HIGHEST STEP O F
NR521A
FAST IDLE SPEED ADJUSTING SCREW
CAM AND RIDING RIDING A G A I N S T FACE OF HIGHEST STEP
/
LIGHT C L O S I N G PRESSURE O N C H O K E LEVER
4
,
- X
^ V A C U U M CHOKE TUBE F I T T I N G
DIAPHRAGM STEM RETRACTED
1
PY728
Fig. 12-Fast
Idle Cam Position
Fig. 13—Checking Choke Vacuum Kick
Adjustment
Setting Setting
14-34
SYSTEM—AVSF U E L SYSTEM—AVS-
f i t t i n g . R e t u r n f a s t i d l e l i n k a g e t o i t s o r i g i n a l c o n d i t i o n
i f d i s t u r b e d a s s u g g e s t e d i n s t e p n o . 1. (6 ) M a k e f o l l o w i n g c h e c k . W i t h n o v a c u u m a p p l i e d
t o d i a p h r a g m . C H O K E
VA LV E
SHOULD
M OVE
TO P OF PLUNGER TO TOP OF A IR HORN
F R E E L Y b e t w e e n o p e n a n d c l o s e d p o s i t i o n s . I f m o v e
m e n t i s n o t f r e e , e x a m i n e l i n k a g e f o r m i s a l i g n m e n t o r i n t e r f e r e n c e s c a u s e d b y b e n d i n g o p e r a t i o n . R e p e a t a d j u s t m e n t i f n e c e s s a r y t o p r o v i d e p r o p e r l i n k o p e r a
f
tion.
C h o k e Unloader
Adjustment
T h e c h o k e u n l o a d e r i s a m e c h a n i c a l d e v i c e t o p a r
B E N D ACCELERATOR PUMP ROD-*A T A N G L E
t i a l l y o p e n t h e c h o k e at w i d e o p e n t h r o t t l e . I t i s u s e d
to
eliminate
chok e enric hm ent
durin g
e n r i c h m e n t c a n b e c l e a r e d b y
u s e o f t h e u n l o a d e r . A d j u s t t h e s y s t e m a s f o l l o w s :
(1 ) H o l d t h r o t t l e v a l v e s i n w i d e o p e n p o s i t i o n . I n s e r t s p e c i f i e d d r i l l ( r e f e r t o S p e c i f i c a t i o n s ) , b e t w e e n
upp er
e d g e o f c h o k e v a l v e a n d i n n e r
w a l l of ai r
h o r n ((F F i g . 14). (2 ) W i t h a f in g e r l i g h t l y p r e s s i n g a g a i n s t c h o k e l e v e r , a s l i g h t d r a g s h o u l d b e f e l t as d r i l l i s b e i n g w i t h d r a w n . I f an a d j u s t m e n t i s n e c e s s a r y , b e n d u n l o a d e r
t a n g o n f a s t i d l e c a m , u s i n g T o o l T - 1 0 9 9-- 2 2, 2 , u n t i l c o r r e c t o p e n i n g h a s b e e n o b t a i n e d ( F i g . 14).
A c c e l e r a t o r Pum p
" ^ THROTT THROTTLE LE CLOSED c
Fig. IS—Cheeking
Acce Accelerator lerator
X
Pum p
P Y
7 2
c
r
N
9
Adjustment
2 1 3 , u n t i l c o r r e c t t r a v e l h a s b e e n o b t a i n e d .
Secondary Sec ondary
Throttle
Lever
Adjustment
T o c h e c k t h e s e c o n d a r y t h r o t t l e l e v e r a d j u s t m e n t , b l o c k t h e c h o k e v a l v e i n t h e w i d e o p e n p o s i t i o n a n d i n v e r t t h e c a r b u r e t o r . S l o w l y o p e n t h e p r i m a r y t h r o t
t l e v a l v e s u n t i l i t i s p o s s i b l e t o m e a s u r e b e t w e e n t h e lower
e d g e o f t h e p r i m a r y
v a l v e a n d t h e b o r e (op
p o s i t e i d l e p o r t ) ( Fi g. 16 16). ). ( R e f e r t o S p e c i f i c a t i o n s ) .
a d j u s t m e n t i s n e c e s s a r y , b e n d t h e s e c o n d a r y t h r o t t l e
Adjustment
l e a s e t h e f a s t i d l e c a m . B a c k o f f t h e i d l e s p e e d a d j u s t
id i d l e ) u n t i l t h e t h r o t t l e v a l v e s a r e
s e a t e d i n t h e b o r e s .
o p e r a t i n g r o d a t t h e a n g l e , u s i n g T o o l T - 1 0 9 - 2 1 3 , u n t i l c o r r e c t a d j u s t m e n t h a s b e e n o b t a i n e d . W i t h p r i m a r y a n d s e c o n d a r y t h r o t t l e v a l v e s i n t i g h t l y c l o s e d p o s i t i o n , i t s h o u l d b e p o s s i b l e t o i n s e r t
T o o l T-109-29 (.020" (.020" ) w i r e
M e a s u r e t h e d i s t a n c e f r o m t h e t o p o f t h e a i r h o r n t o t h e t o p o f t h e p l u n g e r s h a f t , u s i n g a " T " s c a l e , ( F i g . 1 5 5)) . T h i s d i s t a n c e s h o u l d be 7 /16 i n c h .
gaug e, betw een
c o n n e c t o r r o d a t t h e l o w e r a n g l e , u s i n g T o o l
T-109-
- D R I L L C; < G A U G E
L I G H T CLOSING
c l o s i n g s h o e s o n t h e s e c o n d a r y t h r o t t l e l e v e r s , ( F i g .
17). 9-- 2 2, 2 , u n t i l s e c o n d a r y t h r o t t l e l e v e r , u s i n g T o o l T - 1 0 9 c o r r e c t c l e a r a n c e h a s b e e n o b t a i n e d . B E N D RO D T THIS A N G L E
, PRIMARY THROTTLE VALVES
P R E S S U R E UP * .
ON
•
p ositive
I f a n a d j u s t m e n t i s n e c e s s a r y , b e n d t h e s h o e o n t h e
I f a n a d j u s t m e n t i s n e c e s s a r y , b e n d t h e t h r o t t l e
V ?
T h e s e c o n d a r y v a l v e s s h o u l d j u s t s t a r t t o o p e n . If an
M o v e t h e c h o k e v a l v e t o w i d e o p e n p o s i t i o n , t o r e
i n g s c r e w ( c u r b
CURB IDLE SPEED AD J U ST I N G S CRE W BA CKE D OF F TO AL LOW V A L V E S TO FULLY SEAT
c r a n k i n g of
a n e n g i n e . E n g i n e s w h i c h h a v e b e e n f l oo oo d de ed o r s t a l l e d b y e x c e s s i v e c h o k e
? r r
CHO KE
LEVER
SCALE
SECONDARY .THROTTLE VALVES 1 f SHOULD JUST y
BEND UNLOADER — T AN G F O R CORRECT O P E N I N G
THROTTLE IN WIDE O P E N POSITION
m m
"
S L O W L Y O P E N , ' P .THROTTLE V J k - ^ VALVES
• START TO OPEN N O T C H OF OF LOCKOUT D O G NR523A
T A N G ON SECONDARY LEVER ' LEVER '
Fig. 16—Checking Seco Secondary ndary
. C H O K E V A L V E W I DE DE O PE PE N NR525A
Throttle
Adjustment
Fig. 14—Checking Choke Unloader
(w ide open
kick)
AV S — F U E L S Y S T E M
FOR ADJ USTM ENT
F i g . I J — C h e c k i n g C l e a r a n c e Between C l o s i n g S h o e s S e c o n d a r y Throttle
Lock
Out
14-35
~
P Y 7733 1
Adjustment
C r a c k t h e t h r o t t l e v a l v e s , t h e n m a n u a l l y o p e n a n d
c l o s e t h e
chok e valve. Th e
tang
on
the sec ond ary
t h r o t t l e l e v e r s h o u l d f r e e l y e n g a g e i n t h e n o t c h o f t h e
l o c k o u t d o g ( F i g . 1 6) 6) . I f a n a d j u s t m e n t i s n e c e s s a r y , b e n d t h e t a n g o n t h e s e c o n d a r y t h r o t t l e l e v e r , u n t i l e n g a g e m e n t h a s b e e n
mad e. Us e Too l T-109-2 22 2 for th is op eratio n. After adjustm ents have been made, reinstall carbu retor on engin e, us in g a new gas ket. It
i s s u g g e s t e d t h a t t h e c a r b u r e t o r
c l e a n g a s o l i n e . T h i s
will
help
be
f iill le le d w i t h
p r e v e n t d irt
t h a t i s
t r a p p e d i n t h e f u e l s y s t e m , f r o m b e i n g d i s l o d g e d b y
OM i \ j r
t h e f r e e f lo lo w o f f u e l , a s t h e c a r b u r e t o r i s p r i m e d .
Sow
Vent
Va lve
Adjustment
i g . I S - B o w f Vent Va lve AIAdjustment R H O R N
(C.A.S.)
T o c h e c k t h e b o w l v e n t v a l v e a d j u s t m e n t , p r o c e e d a s f o l l o w s :
(1 ) W i t h
t h r o t t l e v a l v e s t i g h t l y c l o s e d , i n s e r t
a
1/8 inc h drill betw een air horn an d valve a att s m a l l e s t (2 ) I f
an
v a l v e o p e r a t i n g l e v e r , u n t i l c o r r e c t v a l v e o p e n i n g h a s
been
obtained.
(4 ) I n s t a l l n e w p l u g a n d r a p l i g h t l y t o s e a t , u s i n g a hammer.
S e c o n d a r y Air
o p e n i n g ( F i g . 1 8 )).. adju stm ent
i s n e c e s s a r y , b e n d
adjusting
tang (on pivot end of lever) unt il co rrec t openin g has
(C.A.S.) N (E.C.S.) R528A
Val ve
Adjustment
(1 ) L o o s e n l o c k s c r e w ( F i g . 1 9) 9) a n d a l l o w a i r v a l v e to pos ition itself a att w i d e o p e n p o s i t i o n . (2 ) F r o m w i d e o p e n p o s i t i o n , ( s p r i n g b a r e l y m o v i n g
been obtained.
v a l v e ) , t u r n s l o t t e d s l e e v e t w o f u l l t u r n s c o u n t e r c l o c k
B o w l Vent
Val ve
Adjustment
w i s e , ( F i g . 1 9 ) .
(E.CS*)
T o c h e c k t h e b o w l v e n t v a l v e a d j u s t m e n t , p r o c e e d as f o l l o w s :
( 3 ) H o l d i n t h i s p o s i t i o n w i t h f i n g e r , l o c k s c r e w s e c u r e l y . C h e c k
val ve
movement.
c h e c k i n g hole pl ug in air hor n. (2 ) W i t h t h r o t t l e v a l v e s at at c l o s e d c u r b i d l e p o s i t i o n ,
Idle Spee Speed d
(1 ) U s i n g T o o l
T109-43, rem ov e
bow l
ven t
i n s e r t a n a r r o w r u l e r d o w n t h r o u g h h o l e . A l l o w r u l e r
t o r e s t l i g h t l y o n to to p o f v a l v e . T h e r e a d i n g s h o u l d b e 3 / 4 i n c h f r o m t o p o f v a l v e to to t o p o f a i r h o r n c a s t i n g a t o p e n i n g . ( F i g . 18 18 ) .
Adjustment—(Curb
R e f e r t o G e n e r a l I n f o r m a t i o n
Fast
Idle
Spee Speed d
F a s t i d l e
Adjustment
valve
then
for
tighten
freedom
of
Idle)
at Fr on t of Grou p.
(On
Vehicle)
engin e speed is us ed to
overc om e cold
engin e frictio n, stalls after cold starts and stalls be c a u s e o f c a r b u r e t o r
icing . Set this
adjustm ent
after
( 3) 3) If I f a n a d j u s t m e n t i s n e c e s s a r y , b e n d
bowl ven t
c a u s e o f c a r b u r e t o r
icing . Set this
adjustm ent
after
1 44 44 6
-A
FU EL SYST EM—AVS '"H "HOKE OKE YA.-.VZ WID IDL, L, OPEN
- .ST it;: i: oPEED
S E C O N D A R Y A I R V A L V E W I D E O P E N
/ OJUSh . v G SCREW
, LOCK
ON
SCREW
SECOND
HI HIGHEST GHEST STEP O F
CAM
4n r
«4& <
ADJUSTING SLEEVE
N
* • r AST AST IIDLE DLE SPEED , ^ ADJ USTIN USTING G
SECONDA SECON DA RY AI R VAL VALVE VE JUST CLOSED
/ ". -A ST
IID DLE CAM
SCREW
N R 5 2 9 A
Fig. 2 @ t e f Idl e Speed Adjustm ent
On Vehi cle)
FAST CURB IDLE S O L EN O ID
LOCK SCREW-
TER M IN AL
X.
TUR N 2 FULL TURNS TURNS FROM WID E OPEN
POSITI ON
PY732
Fig. 19—Secondary A i r V a l v e A d f p s f m e n f v e h i c l e o d o m e t e r i n d i c a t e s o v e r 5 0 0 m i l e s t o i n s u r e a
n o r m a l en e n g i n e f r i c t i o n l e v e l . P r e p a r e e n g i n e b y d r i v i n g a t l e a s t 5 m i l e s . C o n n e c t a t a c h o m e t e r a n d s e t c u r b i d l e s p e e d a n d m i x t u r e , t h e n p r o c e e d as as f o l l o w s :
(1) W i t h e n g i n e o ff a n d t r a n s m i s s i o n i n P A R K o r N E U T R A L p o s i t i o n o p e n t h r o t t l e s l i g h t l y .
(2) C l o s e c h o k e v a l v e u n t i l f a s t i d l e s c r e w c a n b e p o s i t i o n e d o n t h e s e c o n d h i g h e s t s p e e d s t e p o f f a s t i d l e c a m ( F i g . 20). (3)
Start
DISTRIBUTOR GROUND S W ITC H LEAD
FAST CURB IDLE THROTTLE LEVER S O L EN O ID P L U N GER
FAST CURB IDLE A D J U S T I N G ^S CVRLE MW pY734
Fig. 21 I d l e S p e e d Solenoid Fig. Idle Speed equipped)
Solenoid
Adjustm ent
Adjustm ent
(If so
T o s e t i d l e s p e e d s o l e n o i d f o r c o r r e c t e n g i n e r . p . m . , p r o c e e d as foll ows:
( 1) 1) W a r m u p e n g i n e t o n o r m a l o p e r a t i n g t e m p e r a t u r e , t h e n a t t a c h a t a c h o m e t e r . (2) W i t h e n g i n e r u n n i n g , t u r n i d l e s p e e d s o l e n o i d
e n g i n e a n d d e t e r m i n e
s t a b i l i z e d s p e e d .
a d j u s t i n g s c r e w in o r ou t t o o b t a i n 90 0 r . p . m . f o r
T u r n n f a s t i d l e s p e e d s c r e w i n o r out t o s e c u r e s p e c i f i e d
m a n u a l t r a n s m i s s i o n e q u i p p e d v e h i c l e s a n d 8 0 0 r . p . m .
s p e e d . ( R e f e r t o S p e c i f i c a t i o n s ) .
for automatic trans miss ion equip ped vehicl es (Fig. 2 21 1 ))..
(4) S t o p p i n g e n g i n e b e t w e e n
adjus tments i s n o t
( 3) 3) A f t e r
s p e c i f i e d r . p . m . h a s b e e n o b t a i n e d a n d
a s t i d l e s p e e d s c r e w n e c e s s a r y . H o w e v e r , r e p o s i t i o n f as
w i t h e n g i n e s t i l l r u n n i n g (t o e n e r g i z e s o l e n o i d ) , a d j u s t
o n c a m a f t e r e a c h s p e e d a d j u s t m e n t t o p r o v i d e c o r
c u r b i d l e s p e e d s c r e w u n t i l e n d o f s c r e w just touches
r e c t t h r o t t l e c l o s i n g t o r q u e . B e f o r e a d j u s t i n g i d l e a n d / o r f a s t i d l e s p e e d s a n d
s t o p o n c a r b u r e t o r t h r o t t l e b o d y . N o w , b a c k off 1 f u l l t u r n t o o b t a i n s l o w c u r b i d l e s p e e d s e t t i n g . ( A p
m i x t u r e s , m a k e s u r e that t h e b a s i c t i m i n g i s c o r r e c t l y
p r o x i m a t e l y 6 5 0 t o 70 0 r.p.m.)
a d j u s t e d d a s o u t l i n e d ( C u r b Idle .
und er
Idle
Speed Adj us tmen t
T o s e t t h e i d l e s p e e d o n v e h i c l e s , r e f e r t o t h e F u e l S y s t e m Gener al Informati on Parag raph .
HOLLEY -4160 F U E L S Y S T E M
A-
H O L L E Y 4 1 6 0 S E R IE IE S
14 -37 -37
CARB URETOR
INDEX Page
A u t o m a t i c C h o k e - W e l l T y p e . . . . . . . . . . . . . . . . — Carburetor Ad justm ents A d j u s t i n g t h e F l o a t s C h e c k i n g B o w l V e n t V a l v e C l e a r a n c e C h e c k i n g P u m p L e v e r C l e a r a n c e C h e c k i n g Wet F u e l L e v e l en K i c k ) C h o k e U n l o a d e r (Wide O p en F a s t I d l e C a m P o s i t i o n F a s t I d l e S p e e d (On or Off V e h i c l e ) I d l e M i x t u r e
G E N E R A L
3 8 3 Cubic
1
Page
I d l e S p e e d ( C u r b I d l e ) . . . . . . . . . . . . . . . . . . . . . . . 54
S e c o n d a r y T h r o t t l e 49 51 52 54 53 53 53
54
V a c u u m K i c k (On or Off V e h i c l e ) D i s a s s e m b l i n g t h e C a r b u r e t o r C l e a n i n g C a r b u r e t o r P a r t s G e n e r a l I n f o r m a t i o n . . . I n s p e c t i o n a n d R e a s s e m b l y ... S e r v i c i n g C a rb u re to r . . . . . . . S p e c i f i c a t i o n s
...
53 45
..
48 37 48 45 64
53
INFORMATI ON INFORMATION
Inch
T h e H o l l e y
i n g t h e v a r i o u s d i s a s s e m b l y p r o c e d u r e s w i l l n o t a l w a y s
Engine
four
barrel carbu retor
m o d e l s C.A.S.
( C l e a n e r A i r S y s t e m ) R - 4 3 6 7 A , R - 4 3 6 8 A a n d R - 4 3 6 9 A
s h o w a n y o n e s p e c i f i c c a r b u r e t o r . T h e H o l l e y 4160 S e r i e s C a r b u r e t o r ( F i g s . 1, 2 an d 3)
a r e u s e d on t he 38 38 3 c u . i n. e n g i n e s w h e n t h e v e h i c l e s
c a n b e c o n s i d e r e d a s t w o d u a l d o w n d r a f t
a r e e q u i p p e d w i t h m a n u a l o r a u t o m a t i c t r a n s m i s s i o n s
mou nted
r e s p e c t i v e l y . M o d e l R - 4 3 6 9 A i s u s e d w i t h v e h i c l e s e q u i p p e d w i t h a i r c o n d i t i o n i n g o n l y a n d h a s a ho t i d l e
a n d float s y s t e m . T h e t w o f u e l b o w l s i n s u r e a c o n s t a n t s u p p l y of f u e l f o r a l l t h e f u e l m e t e r i n g s y s t e m s . F u e l
c o m p e n s a t o r v a l v e . T h i s v a l v e i s a t h e r m o s t a t i c a l l y
lo w i n t o t h e p r i m a r y a n d t h e s e c o n d f r o m t h e b o w l s f lo
o p e r a t e d ai r b l e e d , t o r e l i e v e an o v e r r i c h
condition
ary
carbur etors
s iid d e b y s i d e , e a c h h a v i n g i t s o w n f u e l
metering
bow l
b o d i e s w h e r e t h e f u e l i s m i x e d w i t h
a t i d l e . T h i s c o n d i t i o n i s t h e r e s u l t of e x c e s s i v e h e a t
a i r f o r a l l p h a s e s of e n g i n e o p e r a t i o n . T h i s t y p e of
a n d r e s u l t a n t o v e r r i c h m i x t u r e s . ( F i g . 1).
m e t e r i n g p r o v i d e s f o r a d e q u a t e d i a g n o s i s an d e a s i e r
T h e H o l l e y
four
barrel
carburetor
m o d e l s E . C . S .
servicing.
( E v a p o r a t i o n C o n t r o l S y s t e m ) R - 4 2 1 7 A a n d R - 4 2 1 8 A
T h e t w o p r i m a r y b o r e s h a v e o n e c h o k e v a l v e , c o n
a r e a l s o u s e d o n the 3 8 83 3 c u . i n. e n g i n e s w h e n t h e v e
n e c t e d t o a w e l l t y p e a u t o m a t i c c h o k e . E a c h b o r e h a s
h i c l e s ar e e q u i p p e d w i t h a m a n u a l o r a u t o m a t i c
i t s o w n v e n t u r i , b o o s t e r v e n t u r i , m a i n f u e l d i s c h a r g e
t r a n s m i s s i o n r e s p e c t i v e l y . T h e s e t w o c a r b u r e t o r s a r e
n o z z l e a n d t h r o t t l e v a l v e .
a l s o e q u i p p e d w i t h a h o t i d l e c o m p e n s a t o r v a l v e as i s
Addit ional
f u e l f o r a c c e l e r a t i o n i s s u p p l i e d b y a
d i a p h r a g m ty p e , m e c h a n i c a l l y o p e r a t e d p u m p
R - 4 3 6 9 A a b o v e . ( F i g . 2). A l l of t h e s e c a r b u r e t o r s ar e e q u i p p e d w i t h a d i s
i s l o c a t e d on th e p r i m a r y
wh ic h
f u e l b o w l . T h e p u m p i s
t r i b u t o r g r o u n d s w i t c h , w h i c h r e t a r d s t h e d i s t r i b u t o r
a c t u a t e d f r o m a c a m o n t h e p r i m a r y t h r o t t l e . A n o v e r
w h e n t h e c a r b u r e t o r i s at c u r b i d l e , f o r b e t t e r e m i s
r i d e s p r i n g o n t h e p u m p o p e r a t i n g l e v e r p r o l o n g s t h e
s i o n c o n t r o l .
d i s c h a r g e o f f u e l f o r s m o o t h e r a c c e l e r a t i o n . A p o w e r v a l v e , m o u n t e d o n t h e p r i m a r y
4 4 0 C u b i c I n c h T h e H o l l e y
four
b o d y , w h i c h i s a c t u a t e d b y m a n i f o l d v a c u u m , d e l i v e r s
Engine barrel
carburetor
m o d e l C.A.S.
6A A i s u s e d on t he 440 c u . i n . ( C l e a n e r A i r S y s t e m ) R - 4 3 6 6 e n g i n e w h e n t h e v e h i c l e i s e q u i p p e d w i t h a n a u t o m a t i c four
t h e a d d i t i o n a l f u e l n e c e s s a r y f o r f u l l p o w e r an d h i g h s p e e d o p eratio n . T h e l a r g e r v o l u m e of f u e l , i n t w o s e p a r a t e b o w l s e x p o s e d to th e c o o l i n g ai r s t r e a m , i s an e f f e c t i v e
t r a n s m i s s i o n . ( F i g . 1).
T h e H o l l e y
metering
barrel
carburetor
m o d e l E.C.S.
m e a n s of r e d u c i n g
p e r c o l a t i o n an d h a r d
starting
( E v a p o r a t i o n C o n t r o l S y s t e m ) R - 4 3 6 0 A i s a l s o u s e d o n
w h e n t h e e n g i n e i s h o t . A n e x t e r n a l
v e n t o n t he
t h e 4 4 0 c u . i n . e n g i n e w h e n t h e v e h i c l e i s e q u i p p e d
p r i m a r y b o w l , v e n t s t h e p r i m a r y f u e l b o w l w h e n the
w i t h an a u t o m a t i c t r a n s m i s s i o n . ( F i g . 2).
t h r o t t l e i s c l o s e d .
B o t h of t h e s e c a r b u r e t o r s ar e e q u i p p e d w i t h a h o t
T h e p r i m a r y a n d / o r s e c o n d a r y b o w l s c a n b e q u i c k l y
i d l e c o m p e n s a t o r v a l v e . T h i s v a l v e i s a t h e r m o s t a t i c a l
r e m o v e d t o a d j u s t t h e f u e l l e v e l o r c h a n g e t h e f u e l
l y o p e r a t e d ai r b l e e d , t o r e l i e v e a n o v e r r i c h c o n d i t i o n a t i d l e . T h i s c o n d i t i o n i s t h e r e s u l t of e x c e s s i v e h e a t
i n l e t v a l v e w i t h o u t r e m o v i n g t h e c a r b u r e t o r f r o m t h e engine.
and
resultant
overric h
m i x t u r e s . Th e d i s t r i b u t o r
g r o u n d s w i t c h r e t a r d s t h e d i s t r i b u t o r w h e n t h e c a r b u r e t o r i s at c u r b i d l e , f o r b e t t e r e m i s s i o n c o n t r o l . S i n c e t he s e r v i c e p r o c e d u r e s ar e i d e n t i c a l on all
Prim ary A l l fu el
F uel Inlet f ir ir st st
System System
e n t e r s t he p r i m a r y
fuel bowl
wh ich
s u p p l i e s t h e f o u r b a s i c m e t e r i n g s y s t e m s w i t h t h e r e
H o l l e y f o u r b a r r e l c a r b u r e t o r s , t h e i l l u s t r a t i o n s s h o w
q u i r e d a m o u n t of f u e l ( F i g . 4).
14-38
FUEL SY SYST TE EM—HOLLEY 4160— F U E L B O W L
S E C O N D A R Y
CH OK E
LINK
VALVE VE - C H O K E E
- IDLE MIXTU TUR E SCREW (LEF T HAND THREAD)
SECONDARY VACUUM DI DIAPHRAG APHRAGM
- B O W L V E N T
VA LVE
METE RING
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D I S T R I B U T O R V A C U U M
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LEVER
CHOK E
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LEVE R
C L O S E D
FAST IDLE CAM
D I A P H R A G M
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CHOKE
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VACUUM
VENT TUBE FITTI NG
DIAPH RAGM
C H O K E U N L O A D E R LEVER
CAS C A R B U R E T O R
NR449B
CHOKE VA AL LVE GUAR ARD CHOKE
BOWL VENT
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V ALV E SECOND ARY
V A C U U M DIAPH RAGM F U E L T R A N S F E R
I D L E
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THROTTLE
BOD Y
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SCREW SE CON DA RY T H R O T T L E
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LINK
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Fig. 1—Ca rbureto rburetorr
Assembly Assembly
(C.A.S.)
-HOLLEY
AH O T
4180—FUEL
IDLE
BOW L
COV ER CHOK E FUEL
TRANSFER CHOKE
V A L V E E
I
VEN T VALVE BOWL \ VENT VEN T VALVE ^ RO D
IDLE MIXTU XTURE ADJUSTING SCREW
V A C U U M
SECONDA RY
DIAP HRA GM
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DI STRI BUTOR GROUN D
VACUUM \ \
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SWIT CH
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V I D L E M I X T U R E SCREW
BOWL VE VEN NT
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ACCELERATOR
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ADJU STING NU T
S E C O N D A R Y
ACCEL ERATOR
P U M P
.VAL VE'
I
VAL VE
CHOK E
TUBE
VA CUU M BOWL
VEN T
14-39
OPERATING ROD
COMPEN SATOR VAL VE
S Y S T E M
X
LEV ER
THROTTLE SHAF T
SECONDA RY C U R B
C1= S?2EL
ADJUS'>:G SCRr*/
VENT BOWL VE
\ VALVE VENT S E C O N D A R Y S T O P L E V E R
TUBE
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FAST
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VACUUM HOSE
CA M
CHOKE
CONTROL LEVER
DISTRIBUTO DISTRIBU TOR R VA CU UM AD VA NC E TUBE TUBE
CHOK E
CONNECTI ON
DIAPHRAGM LINK
THROTTLE
CONNECTOR
CHOK E
LINK
UNLOADER
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PY8 72
Fag. 2—Car bureto buretorr A s s e m b l y (E.C.S.) S E C O N D A R Y Y IDLE A ;? 3Li zDS =
S E C O N D A R Y
...^•SECONDARY FUEL BOWL ^SECONDARY HI GH
V A C U U M D I A P H R A G M
• S E C O N D A R Y
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BLEEDS
BLEEDS
I D L E E A I R
... . BOOSTER VENTUR VEN TURII S
29
PRI MARY I DLE A I R BLEEDS
P R I M A R Y I DLE A I R BLEEDS
C H O K E
DIAP APHRAGM
-CURB IDLE AIR BLEEDS
— BOWL VENT ROD CURB IDLE AIR BLEEDS-"" P R I M A R Y H I G H S P E E D BL EEDS" P R I M A R Y F U E L
BOW L
VENT VALVE
>-BOWL
NR451B
^Carburetor
Assembly (Top V i e w )
14-40
A
F U E L S Y S T E M — H O L L E Y 4160
Fig. 4—Pri System tem Prim mary Fuei Inlet Sys T h e f u e l e n t e r s t h e f u e l b o w l t h r o u g h a f u e l
inlet
f i t t i n g a n d i n t o t h e f u e l i n l e t v a l v e . T h e a m o u n t o f
f u e l e n t e r i n g t h e f u e l b o w l i s d e t e r m i n e d b y t h e s p a c e b e t w e e n t h e t o p o f t h e m o v a b l e n e e d l e a n d i t s s e a t a n d a l s o b y t h e p r e s s u r e f r o m t h e f u e l p u m p . T h e f u e l i n l e t s y s t e m m u s t c o n s t a n t l y m a i n t a i n t h e
s p e c i f i e d l e v e l o f f u e l a s t h e b a s i c f u e l m e t e r i n g s y s
t e m s a r e c a l i b r a t e d t o d e l i v e r t h e p r o p e r
mixtu re
o n l y w h e n t h e f u e l i s a t t h i s l e v e l . A f l o a t
s p r i n g i s i n c o r p o r a t e d u n d e r t h e float t o
k e e p the float i n a s t a b l e p o s i t i o n . T h e f l o a t
c h a m b e r i s v e n t e d i n t e r n a l l y b y t h e v e n t
P R I M A R Y
t u b e a t a l l t i m e s . A t c u r b i d l e o r w h e n t h e e n g i n e i s s t o p p e d , , t h e c h a m b e r i s a l s o v e n t e d b y t h e e x t e r n a l
v e n t o n t o p o f t h e p r i m a r y f u e l b o w l . T h i s e x t e r n a l v e n t p r o v i d e s a r e l e a s e o f e x c e s s f u e l v a p o r s f r o m t h e bowl.
TRAN SFE R
S YS TE M
Fig. 5—Idle System t u r e t h e n f l o w s d o w n a n o t h e r v e r t i c a l p a s s a g e . A t t h e b o t t o m o f t h i s v e r t i c a l p a s s a g e t h e f u e l - a i r m i x t u r e i s
m e t e r e d b y a n i d l e l i m i t e r s c r e w . ( T h i s a d j u s t m e n t i s
Idle System At
IDLE
(Fig, 5)
i d l e a n d l o w s p e e d s , t h e a i r f l o w t h r o u g h t h e
c a r b u r e t o r i s n o t s u f f i c i e n t l y s t r o n g e n o u g h t o d r a w f u e l t h r o u g h t h e p r i m a r y b a r r e l v e n t u r i f o r t h e m a i n m e t e r i n g s y s t e m . I n t a k e m a n i f o l d v a c u u m i s h i g h b e c a u s e o f t h e g r e a t e r r e s t r i c t i o n t o t h e a i r flow b y t h e
n e a r l y c l o s e d t h r o t t l e v a l v e s . T h i s h i g h m a n i f o l d v a c u u m i s u s e d t o p r o v i d e t h e p r e s s u r e d i f f e r e n t i a l w h i c h o p e r a t e s t h e i d l e s y s t e m . T h e c a r b u r e t o r u t i l i z e s t w o i d l e s y s t e m s , o n e f o r
e a c h p r i m a r y b a r r e l . S i n c e t h e t w o p a s s a g e s f u n c t i o n
i d e n t i c a l l y , , o n l y o n e s i d e w i l l b e c o n s i d e r e d i n t h i s e x p l a n a t i o n ( F i g . 5). A t i d l e , t h e n e a r a t m o s p h e r i c p r e s s u r e i n t h e float c h a m b e r c a u s e s t h e f u e l t o f l o w t h r o u g h t h e i d l e s y s t e m t o t h e g r e a t l y r e d u c e d p r e s s u r e a r e a b e l o w t h r o t t l e p l a t e .
Fu el
flo ow ws
f r o m t h e f l o a t
chamber
t h r o u g h a r e s t r i c t i o n i n t o t h e c u r b i d l e w e l l .
m a d e at t h e f a c t o r y a n d n o f i e l d a d j u s t m e n t s h o u l d b e r e q u i r e d . H o w e v e r , i f a n a d j u s t m e n t i s n e c e s s a r y , r e f e r t o
R o u g h I d l e a n d L o w S p e e d S u r g e
para
g r a p h , u n d e r G e n e r a l I n f o r m a t i o n . T h e m i x t u r e
then
flows
t h r o u g h a c h a n n e l i n t h e
t h r o t t l e b o d y t o t h e c u r b i d l e d i s c h a r g e p o r t . T h e f u e l
i s d i s c h a r g e d i n t o t h e t h r o t t l e b o r e
j u s t b e l o w t h e
t h r o t t l e v a l v e .
T h e a i r t h a t i s s u p p l i e d t o t h e c u r b i d l e s y s t e m i s
s u p p l i e d t h r o u g h t w o i d l e a i r b l e e d r e s t r i c t i o n s a n d
b y a c u r b i d l e a i r b l e e d a d j u s t i n g s c r e w . T h i s i s t h e o n l y s c r e w u s e d t o a d j u s t c u r b i d l e m i x
ture. T h e s c r e w i s l o c a t e d n e a r t h e p r i m a r y b o w l v e n t o n
t h e c h o k e a i r h o r n . T u r n i n g t h e s c r e w c l o c k w i s e l e a n s t h e c u r b i d l e m i x t u r e ; c o u n t e r - c l o c k w i s e e n r i c h e n s t h e m i x t u r e .
Prima ry
Idle Transfer
Syst System em
(Fig. 5)
T h e fuel flows u p t h i s v e r t i c a l i d l e w e l l t h r o u g h t h e
A s e p a r a t e o f f --ii d l e s y s t e m i s u s e d i n t h e c a r b u r e t o r
i d l e f e e d r e s t r i c t i o n , a n d t h e n i t i s m i x e d w i t h a i r
t o p r o v i d e f u e l a i r m i x t u r e f r o m i d l e o p e r a t i o n u n t i l
c o m i n g i n f r o m t h e i d l e a i r b l e e d . T h i s f u e l - a i r m i x -
t h e m a i n s y s t e m i s i n f u l l o p e r a t i o n .
• HOLLEY 4160— FUEL SYSTEM
A-
14-41
F u e l f o r t h e i d l e t r a n s f e r s y s t e m e n t e r s t h e m a i n
w h e n d i s c h a r g e d i n t o t h e ai r s t r e a m of t h e v e n t u r i .
w e l l t h r o u g h t h e m a i n j et a n d t r a v e l s u p t h r o u g h t h e
T h e m i x t u r e of f u e l a n d a i r m o v e s u p t h e m a i n w e l l
i d l e t r a n s f e r t u b e a n d c r o s s e s o v e r a p a s s a g e i n t o a
a n d p a s s e s i n t o t h e s h o r t h o r i z o n t a l p a s s a g e l e a d i n g
v e r t i c a l l c h a n n e l w h e r e a i r i s a d d e d f r o m t h e i d l e a i r
to the main body, then through the horizontal c h a n
b l e e d s . Th e f u e l ai r m i x t u r e i s t h e n
n e l of the d i s c h a r g e n o z z l e e.. T h i s f u e l i s d i s c h a r g e d
disc harged
t h r o u g h t h e p r i m a r y t r a n s f e r s l o t s .
i n t o t h e b o o s t e r v e n t u r i a n d t h e n i n t h e a i r s t r e a m of
A s t h e t h r o t t l e v a l v e i s o p e n e d s t i l l w i d e r a n d e n g i n e s p e e d i n c r e a s e s , th e ai r f l o w t h r o u g h t he c a r
the carburetor venturi. T h e t h r o t t l e v a l v e c o n t r o l s t h e a m o u n t of f u e l - a i r
b u r e t o r i s a l s o i n c r e a s e d . T h i s c r e a t e s an i n c r e a s e d
m i x t u r e a d m i t t e d to the i n t a k e m a n i f o l d , r e g u l a t i n g
v a c u u m i n the v e n t u r i to b r i n g t h e m a i n
t h e s p e e d a n d p o w e r o u t p u t of t h e e n g i n e i n a c c o r d
meterin g
s y s t e m i n t o o p e r a t i o n . Th e f l o w f r o m t h e i d l e t r a n s f e r s y s t e m t a p e r s of f a s t h e m a i n m e t e r i n g s y s t e m s b e g i n
d i s c h a r g i n g f u e l . T h e t w o s y s t e m s a r e e n g i n e e r e d to
p r o v i d e s m o o t h g r a d u a l t r a n s i t i o n f r o m i d l e t o c r u i s i n g s p e e d s .
Main
Me Metering tering
Enrichment
System
During high power operation, the carburetor must p r o v i d e a m i x t u r e r i c h e r t h a n i s n e e d e d w h e n th e power requ iremen ts. Th e a ad dded fuel for po wer opera
System
p i s t o n d r a w s the ai ai r t h r o u g h t h e c a r b u r e t o r v e n t u r i
a n d b o o s t e r v e n t u r i . T h e a i r , p a s s i n g t h r o u g h t h e r e s t r i c t i o n of t h e v e n t u r i , c r e a t e s a l o w p r e s s u r e c o m
m o n l y c a l l e d a v a c u u m . T h e s t r e n g t h of t h i s l o w p r e s s u r e i s d e t e r m i n e d p r i m a r i l y b y t h e v e l o c i t y o f t h e a i r
t h r o u g h t h e v e n t u r i . T h i s , i n t u r n , i s r e g u l a t e d
b y t he s p e e d a n d p o w e r
o u t p u t of the e n g i n e . Th e
d i f f e r e n c e , , b e t w e e n t h e p r e s s u r e i n t h e b o o s t e r v e n t u r i a n d t h e n o r m a l a i r p r e s s u r e i n th e float c h a m b e r ,
c a u s e s f u e l t o f l o w t h r o u g h t h e m a i n
m e t e r i n g s y s
t e m ( F i g . 6). At
Power
e n g i n e i s r u n n i n g at c r u i s i n g s p e e ed d u n d e r no g r e a t
A s t h e e n g i n e i s r u n n i n g , t h e i n t a k e s t r o k e of e a c h
f lo lo w wii n ng g
a n c e w i t h a c c e l e r a t o r p e d a l m o v e m e n t .
c r u i s i n g s p e e d , t h e fu el
flo flows ws f r o m t h e float
c h a m b e r t h r o u g h t h e m a i n j e t , w h i c h m e a s u r e s o r
m e t e r s t h e f u e l f l o w , i n t o t h e b o t t o m of t h e m a i n w e l l . T h e f u e l m o v e s u p t h e m a i n w e l l p a s t t h e m a i n w e l l a i r b l e e d h o l e i n t h e s i d e of the w e l l . F i l t e r e d ai r , e n t e r s t h r o u g h t h e h i g h s p e e d a i r b l e e d i n t h e m a i n
b o d y a n d t h e n i n t o t h e m a i n m e t e r i n g b o d y b y i n t e r c o n n e c t i n g p a s s a g e s . T h i s m i x t u r e of f u e l a n d ai r , b e i n g l i g h t e r t h a n r a w f u e l , r e s p o n d s f a s t e r to a n y c h a n g e i n v e n t u r i v a c u u m a n d v a p o r i z e s m o r e r e a d i l y BOOSTER VENTURI
t i o n i s s u p p l i e d by the p o w e r
( F i g . 7 . T h i s s y s t e m i s c o n t r o l l e d b y m a n i f o l d
vacuu m
w h i c h g i v e s an a c c u r a t e i n d i c a t i o n of th e p o w e r d e m a n d s p l a c e d u p o n t h e e n g i n e . M a n i f o l d v a c u u m i s s t r o n g e s t at i d l e a n d d e c r e a s e s as th e l o a d on t he
e n g i n e i n c r e a s e s . A s t h e l o a d on the e n g i n e i s i n c r e a s e d , t h e t h r o t t l e v a l v e m u s t b e o p e n e d w i d e r t o
m a i n t a i n a g i v e n s p e e d . M a n i f o l d v a c u u m i s t h u s r e d u c e d b e c a u s e t h e o p e n e d t h r o t t l e v a l v e o f f e r s l e s s
r e s t r i c t i o n to air entering the intake manifold. A v a c u u m p a s s a g e i n t h e t h r o t t l e b o d y t r a n s m i t s
m a n i f o l d v a c u u m to t h e p o w e r v a l v e c h a m b e r i n t h e m a i n b o d y . T h e p o w e r v a l v e w h i c h i s l o c a t e d i n the main
metering
b o d y i s e f f e c t e d b y t h i s
v a c u u m . Th e m a n i f o l d
manifo ld
v a c u u m , a c t i n g on the d i a
p h r a g m at i d l e o r n o r m a l l o a d c o n d i t i o n s , i s s t r o n g e n o u g h t o h o l d t h e d i a p h r a g m c l o s e d , a n d o v e r c o m e s the
t e n s i o n of the p o w e r v a l v e s p r i n g . W h e n
high
p o w e r d e m a n d s p l a c e a g r e a t e r l o a d on th e e n g i n e a n d m a n i f o l d v a c u u m d rro o p s b e l o w a p r e d e t e r m i n e d point, the power v alve spri ng overcomes the red uc ed v a c u u m o p e n i n g t h e p o w e r v a l v e . F u e l f l o w s f r o m t h e float c h a m b e r , t h r o u g h t h e v a l v e a n d o u t t h e s m a l l
HIGH SPEED AIR BLEED
HIGH SPEED < AIR BLEED
enri chm ent sys tem
/ ^ D I S C H A R G E NOZZLE BOOSTER VENTURI
V = 3 DISCHARGE NOZZLE POWER VALVE RESTRICTION
MANIFOLD VACUUM
MAIN WE LL
NR557A
MAIN JET'
MAIN WE LL
NP602C
Fig. 6—Main Metering Fig.
Fig. 7—Power Enrichment Fig.
System
System
14-42
F U E L S Y S T E M — H O L L E Y 4 1 6 0 -
h o l e s IIn n the
side of
the valv e thr ou gh
th e
d iag ona l
r e s t r i c t i o n s i n t h e m a i n m e t e r i n g b o d y a n d t h e n
into
the mai n well . In the mai n well, the fuel join s the fuel
inlet
c he ck bal l is m ov ed
ph rag m
cha m be r
is
ffii llll ed ed
off its wi th
seat and
fuel
th e
fr om
dia
th e
f llo o at at
bowl.
f lo lo w i n t h e m a i n m e t e r i n g s y s t e m , e n r i c h i n g t h e m i x tu re .
Secondary Seco ndary
* .
A s e n g i n e p o w e r
demands
are reduc ed,
Throttle
Operating
System
manif old
A t l o w e r s p e e d s , t h e s e c o n d a r y t h r o t t l e v a l v e s r e
v a c u u m i n c r e a s e s . T h e i n c r e a s e d v a c u u m a c t s o n t h e diap hrag m, overc om ing the tension of the pow er valv e
m a i n n e a r l y c l o s e d , a l l o w i n g t h e e n g i n e t o m a i n t a i n satisfactory fuel air velocities and distribution . W h en
s p r i n g . T h i s c l o s e s t h e p o w e r v a l v e a n d s h u t s o f f t h e
e n g i n e s p e e d i n c r e a s e s t o a p o i n t
adde d sup ply of fuel wh ic h is no long er req uir ed.
breathing capacity is needed, the vac uu m c ontrolled
wh ere
addition al
s e c o n d a r y t h r o t t l e v a l v e s o p e n a u t o m a t i c a l l y .
Accelerating
Pump
System
V a c u u m taken from o ne of the pr im ary b arrel s and
car
o n e o f t h e s e c o n d a r y b a r r e l s a c t s u p o n a d i a p h r a g m
buretor res pond s almost immediately to the inc reased
w h i c h c o n t r o l s t h e s e c o n d a r y t h r o t t l e v a l v e s . A t h i g h
t h r o t t l e o p e n i n g .
speeds w h e n
engine requirem ents
pacity
of the
two
w h i c h i s h e a v i e r t h a n a i r , c a n g a i n s p e e d a n d m a i n
ma ry
venturi
tain the des ired balan ce of fue l and air, the accele r
p r e s s i n g t h e d i a p h r a g m s p r i n g . T h e d i a p h r a g m , a c t i n g
a t i n g p u m p s u p p l i e s f u e l u n t i l t h e o t h e r s y s t e m s c a n
throug h the diaphr agm link and lever, wi ll com men ce
o n c e a g a i n p r o v i d e t h e p r o p e r m i x t u r e ( F i g . 8 ))..
t o o p e n t h e s e c o n d a r y t h r o t t l e v a l v e s ( F i g . 9 ) .
Up on
acc eleration , the
air
ffll o w
throu gh
the
The ref or e du rin g the brief interv al before the fuel,
T h e a c c e l e r a t i n g p u m p
i s l o c a t e d i n t h e b o t t o m o f
T h e p o s i t i o n
prim ary
vac uu m
of the
appro ach
bo res, the
moves
the
th e c a
inc reas ed pri
diaphragm ,
com
s e c o n d a r y t h r o t t l e v a l v e s d e e
the pr im ary fu el bow l. Th e pum p begins to fun cti on
p e n d s o n t h e s t r e n g t h o f t h e v a c u u m . T h i s i n t u r n , i s
w h e n t h e p u m p o p e r a t i n g l e v e r i s a c t u a t e d b y throttle
d e t e r m i n e d b y t h e ai a i r -f -f l o w t h r o u g h t h e b o r e s t o
movem ent. Wh en
e n g i n e . A s t h e a i r - f l o w i n c r e a s e s , a g r e a t e r s e c o n d a r y
t h e t h r o t t l e i s o p e n e d , t h e
link age, actuat ed by s h a f t , f o r c e s
th e
pu m p
a c a m o n t h e p r i m a r y t hrottle
pum p
diaph ragm
up. A s the
dia
t h r o t t l e v a l v e o p e n i n g w i l l
the
resul t and the sec on dary
b a r r e l s w i l l s u p p l y a g r e a t e r p o r t i o n
of the engin e's
ph rag m mo ves up, the press ur e forc es the pum p inlet
r e q u i r e m e n t s . A s t op s p e e d i s r e a c h e d , t h e s e c o n d a r y
c h e c k b a l l o n i t s s e a t p r e v e n t i n g
t h r o t t l e v a l v e s w i l l a p p r o a c h w i d e o p e n .
fue l fr om
f llo o w in in g
b a c k i n t o t h e f l o oa a t c h a m b e r . T h e f u e l f llo ows fro m
the
A s t h e s e c o n d a r y t h r o t t l e v a l v e s b e g i n t o o p e n , a
s h o r t p a s s a g e i n t h e f u e l b o w l i n t o t h e l o n g d i a g o n a l
v a c u u m is cr eated
p a s s a g e i n t h e p r i m a r y m e t e r i n g b o d y . T h e f u e l p a s s e s
t h e t h r o t t l e v a l v e s a n d t h e n , a s a i r f llo o w i n c r e a s e s , a t
into the m ain body and then in the pu mp di sc harg e
the
c h a m b e r . T h e
a s s i s t s t h e s e c o n d a r y m e t e r i n g s y s t e m t o o p e r a t e .
pres su re of
t h e f u e l c a u s e s t h e d i s
c h a r g e n e e d l e v a l v e t o r a i s e a n d f u e l i s d i s c h a r g e d
throat
of
the
i n t h e s e c o n d a r y b a r r e l s , f iirr st st a t sec ond ary vent uri.
Thi s
va c uu m
Wh en engine speed is reduc ed, ventu ri vac uu m i n t h e b o r e s b e c o m e w e a k e r . A s t h e v a c u u m ac t i n g
into the v entu ri.
on
A s t h e t h r o t t l e i s m o v e d t o w a r d t h e c l o s e d p o s i t i o n ,
the
t h e d i a p h r a g m i s l e s s e n e d , t h e l o a d o n t h e d i a p h r a g m s p r i n g w i l l c o m m e n c e c l o s i n g t h e s e c o n d a r y v a l v e s .
diaph ragm sp ring forces the diaphragm down. As the
T h e d i a p h r a g m s p r i n g i s a s s i s t e d b y t h e d e s i g n o f t h e
diap hra gm
s e c o n d a r y v a l v e s . E a c h s e c o n d a r y v a l v e
the
linkag e ret urn s retu rns
tto o its orig inal
position and
tto o its orig inal position the
pu m p
DISCHARGE NOZZLE
is
slightly
PRIMARY VENTURI PICK-UP
DIAPHRAGM CHAMBER
PUMP DISCHARGE NEEDLE DIAPHRAGM RETURN SPRING DIAPHRAGM
PUMP INLET CHECK BALL
NP603C
DIAPHRAGM DIAPHRAGM ROD
SECONDARY THROTTLE PLATE
NP604B NP604 B
Fig. 9 — S e c o n d a r y Throttle Operating
F i g . 8 — A c c e l e r a t i n g P u m p System
Syste System m
A
•
offset.
:
W h e n t h e v a l v e s ar e c l o s i n g , t h e c o m b i n e d
f o r c e of m a n i f o l d greater
H OL L EY 4 1 60 — FU EL
v a c u u m a n d t h e a i r s t r e a m has
e f f e c t o n t h e l a r g e r ,
ups tream
a r e a of t he
v a l v e s f o r c i n g t h e v a l v e s t o a c l o s e d p o s i ti t i o n . T h e
SY ST EM
14-43
d u r i n g c r a n k i n g a n d w a r m - u p . V a c u u m c r e a t e d b y t h e r e s t r i c t i o n c a u s e s t h i s f u e l f l o w f r o m b o t h t h e m a i n m e t e r i n g an d i d l e s y s t e m s . T h e t h e r m o s t a t s p r i n g of a c o l d e n g i n e p u s h e s the
s e c o n d a r y v a l v e s a r e r e t a i n e d i n t h e c l o s e d p o s i t i o n
c h o k e v a l v e
w h e n t h e p r i m a r y v a l v e s a r e f u l l y c l o s e d b y t h e s e c
e n g i n e i s s t a r t e d , m a n i f o l d
o n d a r y t h r o t t l e c o n n e c t i n g r o d . T h i s r o d , w h i c h i s f a s t e n e d t o t h e p r i m a r y t h r o t t l e l e v e r , r i d e s i n a s l o t
c h o k e v a l v e a n d a v a c u u m d i a p h r a g m a t t a c h e d t o the c a r b u r e t o r b o d y . T h i s v a c u u m a c t s t o o p p o s e t h e t h e r
i n t h e s e c o n d a r y t h r o t t l e l e v e r .
m o s t a t s p r i n g an d p a r t i a l l y preven t
S e c o n d a r y Fuel
Metering
secondary
fuel
bo wl,
t h r o u g h a c o n n e c t i n g
whic h
r e c e i v e s i t s f u e l
t u b e , f r o m t h e p r i m a r y
fuel
inlet. T h e s e c o n d a r y f u e l b o w l i s e q u i p p e d w i t h a f u e l
i n l e t a s s e m b l y w h i c h r e g u l a t e s t h e f lo w of f u e l i n t o t h e b o w l , t h e s a m e a s t h e p r i m a r y f u e l b o w l . T h e s e c ondary
f u e l i n l e t s y s t e m m u s t m a i n t a i n a s p e c i f i e d
l e v e l of f u e l a s t h e t w o s e c o n d a r y f u e l s y s t e m s are c a l i b r a t e d t o d e l i v e r t h e p r o p e r t h e f u e l i s at t h i s l e v e l .
mixtu re
v a c u u m a c t s o n b o t h the
o p e n s t h e c h o k e v a l v e t o
s t a l l s f r o m r i c h n e s s . T h e c h o k e s h a f t
does
n o t p a s s t h r o u g h t h e c e n t e r of a c h o k e v a l v e . I n s t e a d ,
Systems
T h e s e c o n d a r y s y s t e m i s s u p p l i e d w i t h f u e l f r o m
the
t o w a r d t h e c l o s e d p o s i t i o n . W h e n the
only
w hen
A s t h e v a l v e s b e g i n t o o p e n t h e f u e l f llo ows thr ou gh
t h e s e c o n d a r y m e t e r i n g r e s t r i c t i o n s i n t o t h e i d l e w e l l ( F i g . 10).
ix ed ed c u r b i d l e d i s c h a r g e p a s s a g e s u p A s e c o n d a r y f ix p l i e s f u e l d i r e c t l y t o t h e i n t a k e m a n i f o l d , t h u s a l l o w
i n g a s m o o t h e r i d l e . W h e n t h e s e c o n d a r y t h r o t t l e v a l v e s a r e o p e n e d f u r t h e r t h e p r e s s u r e d i f f e r e n t i a l c a u s e s t h e s e c o n d a r y m a i n m e t e r i n g s y s t e m to b e g i n f u n c t i o n i n g .
A u t o m a t i c C h o k e T h e a u t o m a t i c c h o k e s u p p l i e s e n r i c h e d f u e l - ai ai r m i x
t u r e f o r s t a r t i n g a n d o p e r a t i n g a c o l d e n g i n e ( F i g . 11). M o s t o f t h e f u e l f r o m t h e c a r b u r e t o r o f a c o l d e n g i n e i s l i q u i d . T h i s f u e l i n l i q u i d f o r m b u r n s s l o w l y a n d
i t i s o f f s e t t o e x p o s e a l a r g e a r e a at one s i d e t o m a n i f o l d v a c u u m . D u r i n g i d l e o r l o w t e m p e r a t u r e
i n g , m a n i f o l d
v a c u u m i s n o t s u f f i c i e n t l y
crank
s t r o n g to
o p e n t h e c h o k e v a l v e . B u t a i r iim m p a c t a g a i n s t t h e v a l v e c a u s e s p a r t i a l
o p e n i n g . T h e s e t w o f ac ac t o r s ,
vacu um
a n d a i r i m p a c t a l l o w a m p l e a i r tto o r u n t h e e n g i n e . C o n tinued
r u n n i n g of
t h e e n g i n e
develops
h e a t and
c a u s e s t h e t h e r m o s t a t a s s e m b l y t o m o v e t o t h e o p e n
c h o k e p o s i t i o n .
D u r i n g t h e w a r m - u p p e r i o d , a i r f l o w p a s t t h e p a r t i a l l y o p e n o f f s et e t c h o k e v a l v e a c t s t o o p e n t h e v a l v e . J u s t a s i n t h e s t a r t c y c l e , v a c u u m a n d a i r i m p a c t c o m
b i n e t o c o n t r o l t h e c h o k e v a l v e . T h e e n g i n e r e q u i r e d l e s s c h o k i n g at h i g h s p e e d s . T h e o f f s e t c h o k e v a l v e ,
v a c u u m d i a p h r a g m a n d t h e r m o s t a t s p r i n g a r e e n g i
n e e r e d t o p r o v i d e s a t i s f a c t o r y c h o k i n g f o r m o s t c o n d i t i o n s o f e n g i n e s p e e d , o u t p u t a n d t e m p e r a t u r e .
Fast
Idle
T h e c h o k e c o n t r o l l e v e r a t t h e c a r b u r e t o r a c t u a t e s a f a s t i d l e c a m d u r i n g c h o k i n g . A c a m h a s a s e r i e s o f s t e p s d e s i g n e d t o i n c r e a s e c a r b u r e t o r a i r f lo w t o m a i n
t a i n s a t i s f a c t o r y c o l d en e n g i n e s p e e d l e v e l s . T h e p r o p e r c a m s t e p i s m o v e d i n t o p o s i t i o n a s t h e c h o k e r o d i s m o v e d f r o m c l o s e d t o o p e n c o n d i t i o n s . E a c h s t e p
p e r m i t s a s l o w e r i d l e r p m
as as e n g i n e
temp erature
r i s e s a n d c h o k i n g i s r e d u c e d .
i n c o m p l e t e l y . P o w e r l o s s an d s t a l l s r e s u l t . T h e c h o k e v a l v e s u p p l i e s t h e e x t r a f u e l b y r e s t r i c t i n g a i r f l o w
NP606B
Fig. 1 0 — S e c o n d a r y Fuel Mete Metering ring
Syste System m
Fig.
I I —
A u t o m a t i c C h o i c e System
H O L L E Y 4 1 6 0 — F U E L
A-
SYS TE M
1 4 -4 5
1— L e v e r , P u m p Operating 2— Locknut 3 — S p r i n g , o v e r r i d e 4 — S c r e w , P u m p A d j u s t i n g 5 — S c r e w , F u e l B o w l (Primary) 6— Gask et, Bowl Scr ew 7 — F u e l B o w l (Primary) 8— Gask et, Fuel Bowl 9 — Metering B o d y (Primary S i d e ) 1 0 — G a s k e t , Metering B o d y 11— Fuel Tube (Float Bow l Conn ecting ) 1 2— 2— " 0 " R i n g s , F u e l T u b e 13— Scr ew, Fuel Bow l (Secondar y) 1 4 — G a s k e t , B o w l S c r e w 15— Fuel B owl (Secon dary) 1 6— 6— S c r e w , Metering B o d y ( S e c o n d a r y ) 17 — Metering B o d y ( S e c o n d a r y ) 1 8 — G a s k e t , Metering B o d y ( S e c o n d a r y ) 1 9 — P l a t e , Metering B o d y ( S e c o n d a r y ) 2 0 — G a s k e t , Metering B o d y P l a t e 2 1 — B a l a n c e T u b e 2 2— 2— W a s h e r s , B a l a n c e T u b e 23— " 0" Rings, Balanc e Tube 24— Chok e Lin k 25 — S e a l , , C h o k e R o d 26 — T Throttl hrottl e B o d y S c r e w s 27 — Main B o d y 28 — Throttl Throttl e B o d y 2 9 — G a s k e t , Main t o Throttle B o d y 3 0 — S c r e w , B o w l Vent V a l v e R o d C l a m p
47— Gasket , Power Valve 48— Primary Jet s 49 — Needle, Needle, Idle A d j u s t i n g Mixtu re 5 0 — G a s k e t , Idle M i x t u r e Needle 51 — S c r e w s , , C h o k e V a l v e 52— Cho ke Valve 5 3 — C h o k e S h a f t & L e v e r A s s e m b l y 5 4 — D i s c h a r g e Nozzle S c r e w , P u m p 5 5 — G a s k e t , Nozzle S c r e w 5 6 — N o z z l e e,, P u m p D i s c h a r g e 57 — Needle, P u m p D i s c h a r g e J e t 58 — C o t t e r P i n s , C o n n e c t i n g R o d s 59 9— — Rod, Secon dary Conn ecting 6 0 — S c r e w a n d L o c k w a s h e r , F a s t Idle C a m L e v e r 6 1 — L e v e r , F a s t Idle C a m 6 2— S c r e w s , , P r i m a r y Throttle V a l v e 6 3 — Throttle T hrottle V a l v e s , P r i m a r y 6 4 — S c r e w , P u m p C a m 65— Pum p Cam 66 6— — Screw and Lo ckw asher, Secon dary Stop Lever 67— Lever, Secon dary Stop 68 8— — S c r e w s , S e c o n d a r y Throttle V a l v e s 69—Throttle V a l v e s , S e c o n d a r y 7 0 — F a s t Idle C a m L e v e r 7 1— F a s t Idle C a m 72— Retainer (E-Clip ) 7 3 — C h o k e Diaphragm L i n k 7 4 — C h o k e Diaphragm A s s e m b l y 7 5 — C h o k e V a c u u m H o s e 7 6 — C h o k e Diaphragm B r a c k e t S c r e w
31— Clam p, Valve Rod 3 2 — R o d , B o w l Vent V a l v e 3 3 — S p r i n g Vent V a l v e R o d 3 4 — V a l v e , B o w l Vent 35— Retainer, Clip , Float 36_Float 3 7 — S p r i n g , F l o a t 38— Baffle, Flo at 3 9 — Nee Needl dl e V a l v e a n d S e a t 4 0 — S c r e w s , , F u e l P u m p C o v e r 41— Cover Assem bly, Fu el Pum p 42— Diaphragm , Fuel Pum p 4 3 — S p r i n g , F u e l P u m p Diaphragm 4 4 — F i t t i n g , F u e l Inlet 4 5 — G a s k e t , F u e l Inlet, Fitting 46— Valve As sem bly, Power
7 — Diaphragm S ec e c o n d a r y Diaphragm Cover Screw 787 — C o v e r (Machine) 7 9 — S ec e c o n d a r y Diaphragm R e t u r n S p r i n g 8 0 — S ec e c o n d a r y Diaphragm A s s e m b l y 8 1 — S e c o n d a r y Diaphragm H o u s i n g (Machine) 8 2 — S ec e c o n d a r y Diaphragm H o u s i n g G a s k e t 8 3 — S e c o n d a r y Diaphragm A s s e m b l y S c r e w 8 4 — Throttl Throttl e C o n n e c t i n g R o d R e ett a i n e r W a s h e r 8 5 — P u m p Operating L e v e r ( E - C l i p ) 86— Secondary Stop Screw 87 — Throttl Stt o p S c r e w Throttl e S 88 — Throttl Throttl e S t o p S c r e w S p r i n g 89 — Baffle 90— Lim iter Cap 9 1 — B o w l Vent V a l v e A s s y . ( E . C . S . )
Spark
a s t h e t h r o t t l e i s o p e n e d , t h i s p o r t i s s u b j e c t t o m a n i f o l d v a c u u m , w h i c h v a r i e s w i t h c h a n g e s i n e n g i n e l o a d . T h i s p o r t i n t h hee t h r o t t l e b o d y i s c o n n e c t e d t o t h e m a i n b o d y b y a s h o r t v e r t i c a l p a s s a g e , a n d t h e n t o a p a s s a ge ge i n t h e m a i n m e t e r i n g b o d y . T h i s p a s s a ggee l e a d s t o a n o u t l e t o n t h e s i d e o f t h e m a i n m e t e r i n g b o d y w h i c h c o n n e c t s t o a s i n g l e f le le x i b bll e t u b e t o t h e distributor.
Advance
T h e d i s t r i b u t o r u t i l i z e s c h haa n g e s i n a i r p r e s s u r e s p a r k t i m i n g t o
w i t h i n t h e c a r b u r e t o r t o c o n t r o l
s a t i s f y a l l e n g i n e s p eeee d a n d llo o a d conditions. o o b t a i n a v a c u u m t o o p e r a t e t h e s p a r k I n o r d e r tto a d v a n c e a s d i c t a t e d b y t h e e n g i n e s p e e d a n d l o a d c o n d i t i o n s , a p o r t i s llo o c a t e d i n t h e t h r o t t l e b o r e j u s t a b o v e t h e f u l l c l o s e d p o s i t i o n o f t h e t h r o t t l e v a l v e s ,
SERVICE PROCEDURES Servicing
Carburetor
D i r t , d u s t , w a t e r a n d g u m m y d e p o ssii t s a r e s o m e o f t h e m a i n c a u s e s f o r p o o r c a r b u r e t o r o p e r a t i o n . H o w e v e r , p r o p e r c l e a n i n g a n d t h e i n s t a l l a t i o n o f n e w p a r t s , w h e r e r e q u i r e d , w i l l r e t u r n t h e c a r b u r e t o r t o i t s o r i g i n a l l y d e s i g n e d p e r f o r m a n c e . W h e n o v e r h a u l i n g t h e c a r b u r e t o r , s e v e r a l i t e m s o f
i m p o r t a n c e s h o u l d b e o b s e r v e d t o a s s u r e a g o o d j o b : ( 1 ) A l l p a r t s s h o u l d b e c a r e f u l l y c l e a n e d i n a s u i t a b l e s o l v e n t , t h e n i n s p e c t e d f o r d a m a g e o r w e a r . (2 ) U s e a i r p r e s s u r e o n l y t o c l e a r t h e v a r i o u s o r i fices a n d c h a n n e l s . (3 ) R e p l a c e q u e s t i o n a b l e p a r t s w i t h N e w O n e s .
i t
i s a t t iim m e s r a t h e r d i f f i c u l t t o b e s u r e t h e y a r e s a t i s f a c t o r y f o r f u r t h e r s e r v i ccee . I t i s , t h e r e f o r e , r e c o m ca s e s , N e w P a r t s b e i n s t a l l e d . m e n d e d t h a t i n s u c h ca ( 4 ) A l w a y s u s e a c o m p l e t e r e p a i r k i t w h e n o v e rr o d e n u m b e r h a u l i n g t h e c a r b u r e t o r . U s i n g t h e cco s t a m p e d o n t h e a i r h o r n , a d j a c e n t t o t h e f u e l i n l e t , r e f e r t o t h e p a r t s c a t a l o g a n d o r d e r t h e c o r r e c t r e p a i r k i t for
t h e c a r b u r e t o r b e i n g w o r k e d o on n.
D I S A S S E M B L I N G CARBURETOR CARBURETOR T o d i s a s s e m b l e t h e c a r b u r e t o r ( F i g . 1 1)) f o r c l e a n i n g o r o v e r h a u l , p r o c e e d a s f o l l o w s :
(1 ) I n s t a l l f o u r e l e v a t i n g l e g s , T o o l T 1 0 9 - 2 8 7 S i n
W h e n c h e c k i n g p a r t s r e m o v e d f r o m t h e c a r b u r e t o r .
FUEL SYSTEM—HOLLEY 4 1 6 0
14-46
BOWL VENT VALVE ASSEMBLY
P R IIM M A R Y M ET E R I N G
BALA NCE TUBE
BODY
.-
FUEL
• « g - - s ,
•
TRANSFER
•f^
TUBE
MAIN BOOY
J
i
P U M P
OPERATING LEVER NP755B
Fig. 2—Removing or i n s ta ta l l i n g
P r i m a r y Fuel B Bow owl
m o u n t i n g flange h o l e s i n t h r o t t l e b o d y , or u s e C a r b u reto r St and C-3886 6.. ( T h e s e tto o o l s a r e u s e d t o p r o t e c t
A
/
K E T
/P LA TE
k / I
RALAVK TUBE ACCELERATING
/
G
GA SKET
SECO NDA RY ME TERING BODY
NP757C
Fig. 4—Seco 4—Secondary ndary (1 0 ) R e m o v e
Mete Metering ring
CLUTCH HEAD SCR EW
Body, Pla te and
" E " c l u p t h a t r e t a i n s
fast
Gaskets i d l e c am
l e v e r a n d c a m . S l i d e l e v e r a n d c a m off s t u b s h a f t , a n d a t t h e s a m e
time,
diseng age
c h o k e r o d f r o m c am
l e v e r . (Note p o s i t i o n of f a s t i d l e c a m to c a m l e v e r . ) ( 1 1) 1) R e m o v e s e c o n d a r y d i a p h r a g m a t t a c h i n g s c r e w s
t h e t h r o t t l e v a l v e s f r o m d a m a g e a n d to p r o v i d e a s u i t
and
a b l e b a s e f o r w o r k i n g ) . (2 ) R e m o v e p r i m a r y f u e l b o w l a s s e m b l y b y s l i d i n g
p h r a g m s t e m f r o m s e c o n d a r y s t o p l e v e r . R e m o v e g a s ket.
s t r a i g h t of f b a l a n c e t u b e ( F i g . 2 . (3) R e m o v e
pri m ary
(4)
b o d y b y s l i d i n g p l a t e t o
gasket. R e m o v e a c c e l e r a t i n g p u m p o p e r a t in g l e v e r " E "
c l i p a n d s l i d e l e v e r a s s e m b l y off s t u b s h a f t . R e m o v e a d j u s t i n g n u t , s p r i n g a n d s c r e w . ( 5 ) R e m o v e f u e l t r a n s f e r t u b e a n d " 0 " r i n g s ( F i g .
3). U s i n g a c l u t c h
head sc rewd river
(Tool
CL-13)
r e m o v e c l u t c h h e a d s c r e w s , c a r e f u l l y w o r k s e c o n d a r y met ering
bo dy,
p l a t e an d g a s k e t s off b a l a n c e t u b e
( F i g . 4).
(8 ) R e m o v e
balance
tube,
ass emb ly.
Disengag e
w a s h e r s and
0
rings
b y s l i d i n g ou o u t of m a i n b o d y ( e i t h e r e n d ) . (9 ) D i s c o n n e c t c h o k e d i a p h r a g m h o s e f r o m t h r o t t l e b o d y fitting, t h e n r e m o v e d i a p h r a g m
t h e n l i f t out d i s c h a r g e n o z z l e e.. R e m o v e
g a s k e t from
(13)
R e m o v e s c r e w s t h a t a t t a c h h o t i d l e c o m p e n s a
t o r v a l v e c o v e r to m a i n b o d y . L i f t off c o v e r , t h e n re m o v e v a l v e a n d g a s k e t . ( F i g . 5). If s o e q u i p p e d . (1 14 4 ) R e m o v e c u r b i d l e s p e e d s c r e w a n d s p r i n g . T h e n r e m o v e i n s u l a t i n g w a s h e r f r o m b e t w e e n l e a d
term inal
gro und s witc h lead. Us
i n g a t h i n b l a d e s c r e w d r i v e r , r e m o v e i n s u l a t o r b u s h i n g f r o m b o s s o n b o d y . ( F i g . 5). ( 1 5) 5)
Invert carb ureto r and drop out pum p dis ch arge
j e t n e e d l e f r o m d i s c h a r g e p a s s a g e . ( 1 6 ) W i t h c a r b u r e t o r i n v e r t e d , r e m o v e s c r e w s that
DISTRIBUTOR G R OUND SWITCH LE LEAD
CURB I D L E
SPEED
'ADJUSTIN ING SCR EW
GASKET VALVE
a s s e m b l y , at t h e
s a m e t i m e d i s e n g a g i n g l i n k f r o m f a s t i d l e c a m l e v e r . BALANCE
dia
n o z z l e (top a n d bottom).
and stop. Rem ov e distrib utor
(6 ) R e m o v e s e c o n d a r y f u e l b o w l a s s e m b l y . (7)
diap hrag m
( 1 2) 2) R e m o v e p u m p d i s c h a r g e n o z z l e r e t a i n i n g s c r e w ,
met erin g
s t r a i g h t off b a l a n c e t u b e ( F i g . 3). R e m o v e body
rem ove
T U P^ x
,
VALVE ; £ p * 7 \ \ C O V E R ' | /
\
t
BUSHI NG
f GASKET
TUBE
NP756C
Fig. 3—Removing or Installing
N
Prim ary
Metering Metering
SCREWS
SWITCH \ NSULATIN NG G TERMINAL flflg WASHER
Fig. 5—Removing or Installing H ot Idle
PY903
Compensator
Body and Plate
Valve
•HOLLEY 4160— 4160—FUEL FUEL SYSTEM
14 47
y t o main b o d y ( Fig. 5 5). ). R e m o v e a t t a c h t h e t h r o t t l e b o d y t
t h r o t t l e b o d y a n d d i s c a r d g a ske t .
Disassembli Disassemb li ng and
Fuel
Bowls
±
4
(P rimary
••••
Secondary)
Primary (1) R e m o v e p r i m a r y b o w l v e n t v a l v e a s s e m b l y (Fig.
m
wmSL
6). 6). On E . C . S . , r e m o v e o p e r a t i n g r o d a s s e m b l y .
r
..4,
(2 (2)) Rem ov e float r et e t ai ai n e err " E " c l i p , t h e n s l i d e float s p r i n g g out of float c h a m b e r . . ( As float i s b e i n g
and
i..
p out of s e a t r e m o v e d , t h e f u e l i n l e t n e e d l e m a y d r o p
F
a s s e m b l y . ) R e m o v e float baffle. ( 3)
R e m o ve
f ue l
in le t
n e e d le
va lve s e a t . D i s c a r d PO W WE ER
the gasket. (4) Rem ov e s c r e w s
c o v e r . R e m o v e
attaching
cov er,
then
accelerator
car eful ly
dia
p h r a g m a n d s p r i n g . Remove s c r e w s a t t a c h i n g b o w l v e n t v a l v e c o v e r L i f t t off off c o v e r a n d r e m o v e v e n t v a l v e ,
to fuel bowl.
em o v e s e a l f r o m b o t t o m of s p r i n g a n d s e a l . ( F i g . 1) . R em
valve.
(1) Rem ov e float r et e t ai ai n e err " E " c l i p , t h e n s l i d e float an d s p r i n g o u t of float c h a m b e r . (A s float i s b e i n g r e m o v e d , t h e f u e l i n l e t n e e d l e m a y d r o p o u t of s e a t as
s e m b l y . ) R e m o v e float baffle. (2) R e m o v e f u e l
in l e t
n e e d le
va l ve s e a t . D i s c a r d
gasket. It should be noted tha t the P r i m a r y an d Secondary fuel bowl baffles ar e of a different design and should be installed i n t he c correct orrect bowl at reassembly.
Dis assembling
Main
Metering
Valve
c a r e f u l n o t to b to b e n d s c r e w s . ) ) B e s u r e a n d c o u n t n u m b er of t of t u r n s s to s e a t t he s c r e w s , he s a m e n u m b e r , a s t he o f t u r n s ( f r o m t h e se a t ) m u st b e m a i n t a i n e d at d at i n s t a l l a t i o n . R e m o v e s c r e w s a n d s p r i n g s f r o m m e t e r i n g b o d y .
No d i s a s s e m b l y r e q u i r e d , , bu t i t i s v e r y
imp ortant
t h a t t h e w e l l b l e e d p a r t s , m a i n m e t e r i n g r e s t r i c t i o n s a n d i d l e f e e d r e s t r i c t i o n s ar e c l e a n ( Fi Fi g . 9). . 9).
Dis assembling
Secondary Secondary
Diaphra gm
(1) Rem ov e t h e d i a p h r a g m c o v e r s c r e w s s a n d s e p a r a t e d i a p h r a g m c o v e r f r o m h o u s i n g . (2) R e m o v e d i a p h r a g m
r e t u r n s p r i n g f r o m c o v e r ,
t h e n s l i d e d i a p h r a g m o u t of h of h o u s i n g .
Disassembling
Body
Throttle
Body
C A U T I O N : In normal routine cleaning and overhaul of the carburetor, do not remove the throttle valves
Primary (1) U s i n g T o o l C- 374 3747, 7, r e m o v e po we r va l ve a s s e m b l y f r o m p r i m a r y m e t e r i n g b o dy dy (F (F i g . 7). (2) U si n g T o o l C- 37 374 8, 8, r e m o v e m a i n m e t e r i n g j e t s .
(Fig. 8 . (3) R e m o v e id l e a d ju st in g n e e d le s a n d g a s k e t s . (4) T u r n i d l e l i m i t e r c a p s to s t o p s . R e m o v e c a p s b y B O W L VENT -
/
VALVE
I
F
L
O
A
T
4 -| JHIHB JHI HBI MMI E PIVOT
L
PIN
FLOAT
Power
Secondary
Seco nda ry
FLOAT
Fig. 7—Removing or Instal li ng
p r y i n g g off off e n d s s of s c r e w s , u s i n g g a s u i t a b l e t o o l . . (B e
(5) R e m o ve f u e l in l e t fitting a n d d i s c a r d gasket. (6)
NY41B
TOOL
pump
remov e
V A L V E S
;
unless they are nicked or damaged. If necessary to remove, pr oceed oceed as follows: (1) Rem ov e s c r e w s t h a t h o l d t h r o t t l e v a l v e s s t o
. These t h r o t t l e s h a f t s . MAIN
METE RING
BOD Y
( PR I MA R Y)
screws are staked to prevent
^
POW ER
rVJi]
VALVE
4^ 4^.. • .4.
TOO;.
i ;. \Y
v
•
RETAINER:
"E " C L I P
R
F U E L • I N L E T
^>^
- V;\
MAIN
ACCELERATOR PU PUM MP COVER AN D
LEVFR
*
K
O
A
SPRI NG
METE RING
JETS
T
A S S E M B L Y
NP7 59
MY43C
Fig. 6—Pri mary Fuel Bowl
Fig. 8—Removing or Inst all ing M@in Met®ras et®ras d$} J&ts
Assembly Assembly
14-48
F U E L S Y S T E M — H O L L E Y 4160-
• A
d a m a g e , i n s t a l l n e w v a l v e s a s f o l l o w s :
MAIN WELL
M A I N A I R
IDLE FEED FUEL AND AN D AIR RESTRICTION
WELL
I
S IDLE FUEL i ' V WELL
( 1 ) S l i d e n e w p r i m a r y t h r o t t l e v a l v e s i n p o s i t i o n o n t h r o t t l e s h a f t , w i t h t h e v a l v e n u m b e r o n t h e b o t t o m
(flange
s i d e ) a n d t o w a r d i d l e t r a n s f e r a n d s p a r k ad
v a n c e c o n t r o l p o r t s .
(2)
I n s t a l l n e w a t t a c h i n g s c r e w s s b u t do not t i g h t e n .
( 3 ) H o l d v a l v e s i n p l a c e w i t h
f iin n ge g e r s. s. ( F i n g e r s p r e s s
i n g o n h i g h s i d e o f v a l v e s . ) (4) Tap v a l v e s l i g h t l y w i t h s c r e w d r i v e r i n t h i s p o s i
DO OW WL
WELL BLEED
t i o n t o c e n t e r i n b o r e s . T i g h t e n s e c u r e l y . O p e r a t e t h e t h r o t t l e s h a f t s . F r o m
c l o s e d t o o p e n
position , they
m u s t o p e r a t e s m o o t h l y w i t h o u t d r a g o r s t i c k i n g . H o l d
S C R E W
t h r o t t l e b o d y u p t o a s t r o n g l i g h t . T h e l i g h t w h i c h i s
H O L ES
NP76 1A
F i g . 9—Secondary Metering Body loosening an d care i s necessary to avoid breaking off in shaft. Remove staking with a file.
(2 2)) S l i d e d a m a g e d t h r o t t l e v a l v e s o u t o off b o r e s . I t s h o u l d b e n o t e d at t h i s
time,
v i s i b l e a r o u n d t h e o u t e r d i a m e t e r o f t h e v a l v e s a n d
t h e b o r e s s h o u l d b e u n i f o r m .
t h a t t h e s e c o n d a r y
t h r o t t l e v a l v e s a r e t h i c k e r t h a n t h e p r i m a r y v a l v e s .
( 5 ) I n s t a l l s e c o n d a r y t h r o t t l e v a l v e s i n t h e s a m e m a n n e r
as d e s c r i b e d
p r e v i o u s l y .
T h e n u m b e r s
s t a m p e d o n t h e v a l v e s m u s t b e t o w a r d i d l e t r a n s f e r a n d s p a r k a d v a n c e p o r t s i n p r i m a r y b o r e s . F o r a d j u s t m e n t ( Se Se e S e c o n d a r y T h r o t t l e A d j u s t m e n t ) .
Do not install secondary valves in primary bores or
As sembli ng
visa versa as the relationship of the primary valves to
(Primary)
Main ai n
Meteri ng
Body
the idle transfer port an d spark advance control ports
( 1 ) I n s t a l l i d l e m i x t u r e s c r e w s an d s p r i n g s i n m e t e r
is carefully established for one particular asse assembly. mbly.
i n g b o d y . ( The t a p e r e d p o r t i o n m u s t b e s t r a i g h t a n d
C L EA N I N G C A R B U R E T O R
s m o o t h . I f t a p e r e d p o r t i o n i s g r o o v e d o r r i d g e d , a n e w
PA RT l
i d l e m i x t u r e s c r e w s h o u l d b e i n s t a l l e d t o i n s u r e h a v
T h e r e c o m m e n d e d s o l v e n t f o r g u m d e p o s i t s i s d e
n a t u r e d a l c o h o l w h i c h i s e a s i l y o b t a i n a b l e . H o w e v e r , t h e r e a r e o t h e r c o m m e r c i a l s o l v e n t s , ( s u c h a s M e t a l c l e n e ) w h i c h m ay b e u s e d w i t h s a t i s f a c t o r y r e s u l t s . T h e c h o k e d i a p h r a g m c an b e d a m a g e d b y s o l v e n t s .
A v o i d p l a c i n g t h e d i a p h r a g m a s s e m b l y i n A N Y l i q u i d . C l e a n t h e e x t e r n a l s u r f a c e s w i t h a c l e a n c l o t h o r s o f t
w i r e b r u s h . S h a k e d i r t o r o t h e r f o r e i g n m a t e r i a l
fro m
t h e s t e m s i d e o f t h e d i a p h r a g m . D e p r e s s i n g t h e d i a p h r a g m s t e m t o th e r e t r a c t e d p o s i t i o n , w i l l p r o v i d e a n a d d i t i o n a l h o l e f o r t h e r e m o v a l o f d ir ir t . C o m p r e s s e d a i r c a n b e u s e d t o r e m o v e l o o s e d i r t , but should not be connected to the vacuum inlet fitting. I M P O R T A N T : If the commercial solvent or cleaner recommends the use of water as a rinse, i t should be "HOT".
After
r i n s i n g , al l trace of water must be
blown from th e passages with ai r pressure. It is fur ther advisable to rinse al l parts in clean gasoline or kerosene t o b be e certain no trace of moisture r emains. Never clean jets with a wire, drill or other mechanical means b e c a u s e th e orifices m a y bec become ome enla rged, making th e fuel mix ture too rich f or proper perform ance.
D O N O T c l e a n a n y r u b b e r
d i a p h r a g m s o r p l a s t i c
p a r t s i n c l e a n i n g s o l v e n t b e c a u s e o f p o s s i b l e d a m a g e .
ing
correc t idle
SCREW
mi xtu re
c o n t r o l . ) DO NOT USE A
D R I V E R . T u r n s c r e w s l i g h t l y
s e a t s w i t h
fin ng g e rs r s .
agains t
their
B a c k k o f f t h e n u m b e r o f t u r n s
c o u n t e d at d i s a s s e m b l y . I n s t a l l n e w p l a s t i c c a p s w i t h ta bs ag ain s t s to p .
( 2 ) S l i d e a n ew g a s k e t o v e r p o w e r v a l v e an d i n s t a l l , u s i n g T o o l
C -3 - 3 7 47 47 . T i g h t e n
(3 ) I n s t a l l m a i n m e t e r i n g
s e c u r e l y (F ig . 7). 7). j e t s ( F i g . 8) , u s i n g T o o l
C - 3 74 74 8 . T i g h t e n s e c u r e l y . Assembling Assemb ling
Fuel
Bowls
Primary (1 ) I n s t a l l fuel
bowl,
accelerato r pum p
s p r i n g i n p o s i t i o n i n
f o l l o w e d b y d i a p h r a g m a n d p u m p
cover.
( W h e n i n s t a l l i n g d i a p h r a g m , b e s u r e c o n t a c t b u t t o n i s t o w a r d p u m p l e v e r i n c o v e r . ) (F ( F i g . 10). ( 2 ) P l a c e c o v e r o v e r d i a p h r a g m ( w i t h l e v e r o n f u e l i n l e t fitting s i d e ) ( F i g . 10). I n s t a l l a t t a c h i n g s c r e w s and tighten sec urel y. (3)
I n s t a l l n ew g a s k e t o n f u e l i n l e t n e e d l e s e a t ( F i g .
1 1 ) t h e n i n s t a l l i n f u e l b o w l . T i g h t e n s e c u r e l y . S l i d e fu el inlet need le into seat. ( 4) 4) I n s t a l l
floa att
b a f f l e i n p o s i t i o n , t h e n
sli de
f llo o at at
h i n g e o v e r p i v o t a n d s e c u r e w i t h " E " c l i p . I n s t a l l f lo a t s p r i n g . (5)
I n s t a l l n e w g a s k e t o v e r f u e l
inlet
f iitt titi n ng g,
the n
I N S P E C T I O N A ND R E A S S E M B L Y
i n s t a l l fitting i n p r i m a r y f u e l b o w l . T i g h t e n s e c u r e l y .
Throttle
b e i n g s u r e v e n t v a l v e s p r i n g i s h o o k e d i n t o
Body
( 6 ) I n s t a l l b o w l v e n t v a l v e a s s e m b l y o n f u e l
bow l,
brac ket
I f t h e t h r o t t l e v a l v e s w e r e
remov ed
b e c a u s e of
and
l o o p o f s p r i n g
under
o p e r a t i n g r o d . P o s i t i o n
- H O L L E Y 4 1 6 0 — F U E L S Y S T E M M PRIMARY FUEL BOW L RETURN
FUEL INLET SEAT
SPRI NG
FUEL INLET
ACCELERATOR .PUMP
PRIMARY FUEL BOWL
G A SK E T
DIAPHRAGM
14-49
NEEDLE
DI APHR AGM
FLOAT
*
^CON TA CT
FUEL INLET
ACCELERATOR
FITTING
PUMP
• PUMP
INLET
CHEC CHECK K
( N O T
BUTTON
COVER
RETAINER
\
•
BAFrLE
ASSEMBLY
BALL
REMOVABLE)
PU PUMP MP
LEVER
NP762
r-LOAT • SPRING
PUMP C OV E R SC R E W S
Fig. 1 0 — A c c e l e r at i n g Pu m p (E x p l o d dee d c l a m p t h e n
View)
i n s t a l l a t t a c h i n g s c r e w a n d t i g h t e n s e
(7 ) O n E . C . S . c a r b u r e t o r s , i n s t a l l s e a l l o n b o t t o m o f v e n t v a l v e . S l i d e p l a s t i c v a l v e a n d s e a l i n t o c o v e r , w i t h v a l v e r e c e s s , m a t i n g w i t h s h o u l d e r o n u n d e r s i d e
bow l
vent
o p e n i n g i n b o w l , t h e n
v alve
s p r i n g i n p o s i t i o n i n
i n s t a l l v a l v e a n d c o v e r
over
s p r i n g . I n s t a l l a t t a c h i n g s c r e w s s a n d t i g h t e n s e c u r e l y .
(9 ) I n s t a l l
bow l
ven t
NP763
Fig. I 1 — F l o a t , N e e d llee , S eeat at and and B af f l e (Exploded View)
c u r e l y . ( C . A . S . ) C a r b u r e t o r s . ( F i g s . . 1 or 2).
of cover. (8 ) I n s t a l l
FLOAT ASSEMBLY
o p e r a t i n g r o d , c l a m p a n d
Secondary ( 1 ) I n s t a l l n e w g a s k e t o n f u e l i n l e t n e e d l e s e a t ( F i g . 1 1) 1 ) , t h e n i n s t a l l i n f u e l b o w l . T i g h t e n s e c u r e l y . S l i d e f u e l i n l e t n e e d l e i n t o s e a t . (2)
I n s t a l l float baffle i n p o s i t i o n , t h e n s l i d e float
h i n g e o v e r p i v o t a n d s e c u r e w i t h spring.
Adjusting
E
c l i p . I n s t a l l float
Floats
( 1 ) I n v e r t t h e p r i m a r y f u e l b o w l a n d u s i n g a 1 5/ 6 4
s p r i n g i n p o s i t i o n o n b o w l . I n s t a l l a t t a c h i n g s c r e w a n d
i n c h d r i l l s h a n k o r g a u g e , m e a s u r e t h e c l e a r a n c e b e
t i g h t e n s e c u r e l y .
t w e e n t o e o f float a n d s u r f a c e o f f u e l b o w l . ((F F i g . 12). E
CLIP
BAFFLE
FLOAT
FUEL BOWLSE C OND A R Y FUEL BOWL FUEL INLET
FLOAT SPRING
ACCELERATOR PUMP COVER AND LEVER
NEEDLE AND SEAT ASSEMBLY
V..
PRIMARY FUEL BOWL
O F HEEL FLOAT
15/64 17 64 DRILL OR G A U G E
DRILL TO E OF FLOAT
NP764A
Fig. 12—Checking Float Setting (Primary and and Secondary)
14-50
•A
FUEL SYSTEM—HOLLEY 4160
I f a n a d j u s t m e n t i s n e c e s s a r y , b e n d
f lo lo at at
t a n g u n t i l
c o r r e c t clearance h a s b e e n o b t a i n e d .
(2 ) I n v e r t t h e s e c o n d a r y f u e l b o w l a n d u s i n g a 17/64
inc h drill
a n c e b e t w e e n ( F i g . . 12). If
s h a n k o r g a u g e , m e a s u r e t h e c l e a r
h e e l o f f lo a t a n d s u r f a c e o f f u e l
bow l
an a d j u s t m e n t i s n e c e s s a r y , b e n d
flo oa at
tang unt il co rrec t cl earan ce has been obtained.
Assembling (1)
Ma in
Body
P l a c e a n e w g a s k e t o n t h r o t t l e b o d y , t h e n l o w e r
m a i n b o d y ((F F i g . 13) d o w n o n t h r o t t l e b o d y , r o l l p i n g u i d e s w i t h prim ary
alig nin g
o p e n i n g s i n m a i n b o d y . B e s u r e
b o r e s o f t h r o t t l e b o d y a r e o n t h e s a m e s i d e
a s p r i m a r y v e n t u r i .
(2) H o l d i n g a s s e m b l y t o g e t h e r , i n v e r t a s s e m b l y a n d i n s t a l l a t t a c h i n g s c r e w s . T i g h t e n s e c u r e l y .
Fig. 14—P ositioning ositioning Bal ance
( 3 ) I n s t a l l b a l a n c e t u b e i n t o m a i n b o d y a n d i n s t a l l n e w " 0 " r i n g s a n d w a s h e r s a t e a c h e n d . B e s u r e " 0 " r i n g s a r e s e a t e d i n r e c e s s e s , f o l l o w e d b y w a s h e r s .
(4)
I n s t a l l a n e w s e c o n d a r y m e t e r i n g b o d y t o m a i n
Tube
I f n e w g a s k e t s a r e n o t u s e d , , a f u e l l e a k w i l l d e v e l o p . ( B e s u r e a n d i n s t a l l d i s t r i b u t o r g r o u n d s w i t c h l e a d
a n d l e a d c l a m p o n l o n g s c r e w a d j a c e n t t o f u e l
inlet.)
b o d y g a s k e t ((F F i g . 4) f o l l o w e d b y m e t e r i n g b o d y p l a t e , p l a t e g a s k e t a n d b o d y . I n s t a l l c l u t c h h e a d s c r e w s a s a n d
( 9 ) S l i d e a n e w " 0 " r i n g o n e a c h e n d o f f u e l t u b e , t h e n i n s t a l l f u e l t u b e i n t o o p e n i n g i n p r i m a r y f u e l
t i g h t e n s e c u r e l y . (B e s u r e t h e m a i n m e t e r i n g r e s t r i c
b o w l . P r e s s i n o n t u b e e n d u n t i l s e a t e d . (1 100 ) C a r e f u l l y s l i d e s e c o n d a r y f u e l b o w l o v e r b a l
t i o n p o r t s a r e at t h e b o t t o m ) . o n l y 1 i n c h ex
a n c e t u b e a n d f u e l t u b e a n d s e a t a g a i n s t g a s k e t . I n
t e n d s b e y o n d t h e s e c o n d a r y m e t e r i n g b o d y ( F i g . 14).
s t a l l s e c o n d a r y f u e l b o w l a t t a c h i n g s c r e w s a f t e r i n
( U s e a 6 i n c h r u l e r f o r t h i s m e a s u r e m e n t . )
s t a l l i n g n e w g a s k e t s . T i g h t e n s e c u r e l y .
( 5 ) P o s i t i o n b a l a n c e t u b e s o t h a t
(6)
P l a c e a n e w g a s k e t o v e r p r i m a r y m e t e r i n g
a l i g n i n g p i n . ( R e a r ) C a r e f u l l y
slid e me terin g
body
(1 1 1)) I n s t a l l a c c e l e r a t i n g p u m p d i s c h a r g e n e e d l e i n
body
t h e d i s c h a r g e p a s s a g e i n t h e c e n t e r o f p r i m a r y v e n
S l i d e a n e w g a s k e t o v e r m e t e r i n g b o d y
align
men t stu ds and car eful ly position against body. (8 ) C a r e f u l l y i n s t a l l p r i m a r y f u e l b o w l o v e r b a l a n c e tube and down again st me terin g body. Slide new gas k e t s o v e r t h e l o n g f u e l b o w l m o u n t i n g s c r e w s , t h e n i n s t a l l i n p o s i t i o n t h r o u g h f u e l b o w l . T i g h t e n s e c u r e l y .
turi. T o t e s t n e e d l e f o r s e a l i n g , p o u r c l e a n g a s o l i n e i n t o
p r i m a r y f u e l b o w l t h r o u g h v e n t v a l v e o p e n i n g . P u s h d o w n o n a c c e l e r a t o r p u m p a r m t o e x p e l a i r f r o m t h e p u m p p a s s a g e s . U s i n g a s m a l l c l e a n b r a s s r o d , the dis ch arge ch ec k needle
hold
fir m mll y o n i t s s e a t . A g a i n
p r e s s d o w n o n p u m p a r m . N o f u e l s h o u l d b e e m i t t e d
f r o m t h e d i s c h a r g e p a s s a g e . F u e l l e a k a g e a t t h e d i s c h a r g e n e e d l e
i n d i c a t e s t h e p r e s e n c e o f d i r t or a
d a m a g e d c h e c k n e ed l e . C l e a n a ag g a i n a n d i n s t a l l a n e w n e e d l e . R e t e s t f o r l e a k a g e .
If
fuel
c o n t i n u e s t o l e a k
past
discharge
ch eck
n e e d l e , a t t e m p t t o r e s e a t a s f o l l o w s : W i t h t h e d i s c h a r g e c h e c k n e e d l e i n s t a l l e d , i n s e r t a
p i e c e o f d r i l l r o d d o w n o n t h e n e e d l e . L i g h t l y t a p t h e
d r i l l r o d w i t h a h a m m e r t o f o r m a n e w s e a t . R e m o v e a n d d i s c a r d o l d n e e d l e a n d i n s t a l l a n e w o n e . R e t e s t a s d e s c r i b e d p r e v i o u s l y . I f t h e s e r v i c e fi x d o e s n o t
c o r r e c t t h e c o n d i t i o n , a n e w c a r b u r e t o r w i l l h a v e t o
be installed. ( 12 12 ) I n s t a l l p u m p d i s c h a r g e n o z z l e g a s k e t , n o z z l e a n d m o u n t i n g s c r e w a n d g a s k e t . T i g h t e n s c r e w s e c u r e l y . T e s t n o z z l e o p e r a t i o n . P r e s s p u m p l e v e r d o w n . T h e t w o s t r e a m s f r o m t h e n o z z l e s h o u l d b e i d e n t i c a l
a n d s h o u l d s t r i k e t h e t w o v e n t u r i i n t h e s a m e s p o t . (13)
S l i d e t h e b o w l v e n t v a l v e s h a f t d o w n
betw een
Fig. 13—Ma in Body Identification
(Bottom
f u e l ttu u b e a n d c a r b u r e t o r b o d y . H o l d i n p o s i t i o n , t h e n
View )
A
H O L L E Y 4160—FUEL S Y S T E M
install clam p, after
engag ing
14-51
s t u b en d of s p r i n g i n
clam p. Instal l retaini ng sc rew and tighten sec ure ly. ( 1 4) 4) L o o s e n c h o k e v a l v e a t t a c h i n g s c r e w s s l i g h t l y . ( 1 5 ) T a p l i g h t l y on c h o k e v a l v e to c e n t e r v a l v e i n a i r h o r n . H o l d i n g c h o k e v a l v e w i t h t h e f i n g e r s , t i g h t e n a t t a c h i n g s c r e w s s e c u r e l y . S t a k e b y s q u e e z i n g w i t h pliers. (1 16 6 ) E n g a g e f a s t i d l e c a m w i t h f a s t i d l e c a m l e v e r , then slid e ass emb ly onto stub shaft positioning
fast
i d l e c a m b e h i n d f a s t i d l e c a m l e v e r . A t t h e s a m e t i m e e n g a g e f a s t i d l e c a m l e v e r w i t h c h o k e r o d . I n s t a l l " E "
VACUUM HOLE
c l i p to s e c u r e .
F i g . 1 5 — S e c o n d a r y T h r o t ttll e
C h o k e V a c u u m
(Exploded
Diaphrag gm m
I n s p e c t t h e d i a p h r a g m
v a c u u m fitting to be s u r e
t h a t t h e p a s s a g e i s n o t p l u g g e d w i t h f o r e i g n
mat erial.
L e a k c h e c k t h e d i a p h r a g m to d e t e r m i n e i f i t h a s i n
ternal
l e a k s . To do t h i s , f iirr st s t d e p r e s s t h e d i a p h r a g m
s t e m , , t h e n p l a c e a f i n g e r
o v e r t h e fitting to s e a l t h e
o p e n i n g . R e l e a s e t h e s t e m . If t h e s t e m m o v e s
mo re
(10) s e c o n d s , t he l e a k a g e i s t h a n 1/16 i n c h i n ten (10) e x c e s s i v e a n d t h e a s s e m b l y m u s t b e r e p l a c e d .
I n s t a l l t h e d i a p h r a g m
a s s e m b l y o n t h e c a r b u r e t o r
a s f o l l o w s :
( 2 ) P l a c e t h e d i a p h r a g m on the m o u n t i n g
surfac e.
I n s t a l l a n d t i g h t e n t h e a t t a c h i n g s c r e w s s e c u r e l y . ( 3 ) I n s p e c t t h e r u b b e r h o s e f o r c r a c k s b e f o r e p l a c i n g i t o n t h e c o r r e c t c a r b u r e t o r fitting. D o n o t c o n n e c t t h e v a c u u m h o s e t o t h e d i a p h r a g m fitting u n t i l
after
t h e v a c u u m k i c k ad j u s t m e n t h a s b e e n m a d e . I n s t a l l ho t i d l e
c om pens ator
valve
g a s k e t i n
p o s i t i o n i n r e c e s s i n m a i n b o d y , f o l l o w e d b y v a l v e . (Be s u r e v a l v e i s p o s i t i o n e d w i t h l e g s t o w a r d
m ain inst all
b o d y . ) ( F i g . 5). P l a c e c o v e r a t t a c h i n g
s c r e w s .
o u t s i d e o f
o v e r o p e n i n g and
Tighten
s e c u r e l y . (If so
equipped.) (5)
then
c arefully
lower
Diaphragm
View)
co ver. Install
a t t ac h i n g s c r e w s
and tighten secu rely. ( 6 ) C h e c k d i a p h r a g m b y p r e s s i n g in o n s t e m a n d pla ci ng
fin g ge er
ov er port.
Diap hr ag m
s h o u l d s t a y i n
retrac ted position. (7) in
I n s t a l l a n e w g a s k e t i n v a c u u m p a s s a g e r e c e s s
diaph ragm
hous ing, then
ins tall sec ond ary
t i m e e n g a g e
s t e m w i t h s e c o n d a r y s t o p l e v e r . pu mp
l e v e r on s t u b
s h a f t a n d s e c u r e
w i t h " E " c l i p . S l i d e s p r i n g a n d l o c k n u t b e t w e e n
pu m p lever and pu mp op erating v a l v e an d i n s t a l l a d j u s t i n g
fuel
l e v e r . O p e n throttle
s c r e w . T i g h t e n 2 or 3
t h r e a d s to h o l d . T h e c o r r e c t s e t t i n g of t h e a d j u s t i n g s c r e w w i l l b e c o v e r e d u n d e r a d j u s t m e n t s .
CARBURETOR ADJU JUSTMENTS I t i s v e r y i m p o r t a n t that t h e f o l l o w i n g b e m a d e o n a r e c o n d i t i o n e d
adjustm ents
carbu retor:
Qualify ing the Cho ke Con trol L ev er Cho ke Unlo ader Ad jus tm ent (wide open kick) F a s t IId dle Cam Position Ad jus tm ent
S l i d e a n e w d i s t r i b u t o r g r o u n d s w i t c h i n s u l a t e d
V a c u u m K i c k A d j u s t m e n t ((O O n o r o f f v e h i c l e ) F a s t IId dle Speed Ad ju st m ent (On the vehic le)
w i t h r a i s e d p o r t i o n o f b o s s . F o r c e i n t o p o s i t i o n a g a i n s t
Chec kin g the B ow l Vent Va lve Clearance.
stop.
C h e c k i n g g t h e P u m p L e v e r C l e a r a n c e
(6 ) P l a c e i n s u l a t i n g w a s h e r o v e r t a n g s o n l e a d w i r e then
ins tall
c urb
idle
speed
s c r e w with
s p r i n g t h r o u g h t e r m i n a l a n d w a s h e r . (7 ) T u r n
Install
s c r e w s a n d t i g h t e n s e c u r e l y .
b u s h i n g i n t o s t o p o n m a i n b o d y , w i t h t h e n o t c h a l i g n e d
term inal,
dia
p h r a g m o n m a i n b o d y of c a r b u r e t o r a n d at t h e s a m e
(8 ) I n s t a l l
( 1 ) E n g a g e c h o k e l i n k i n s l o t i n c h o k e l e v e r .
(4)
NP767
s c r e w i n t o b o s s , at th e s a m e t i m e ,
S e c o n d a r y T h r o t t l e A d j u s t m e n t keep
insu lating was her aligned.
Assembling
Secondary Secondary
Dia phragm
C h e ck ck i n g (C.A.S.)
( 2 ) P o s i t i o n d i a p h r a g m s o t h a t t h e v a c u u m h o l e i n h o u s i n g i s a l i g n e d w i t h v a c u u m h o l e i n d i a p h r a g m . ( 3 ) I n s t a l l d i a p h r a g m r e t u r n s p r i n g w i t h c o i l e d e n d s n a p p e d o v e r b u t t o n i n c o v e r . diaph ragm
I d l e M i x t u r e A d j u s t m e n t C h e c k i n g W e t F u e l L e v e l
( 1 ) S l i d e d i a p h r a g m i n t o h o u s i n g ( F i g . 15).
(4 ) S u p p o r t
Idle Speed Ad ju stm ent (Cur b idle) A d j u s t i n g t h e F l o a t
s t e m i n o r d e r t o k e e p
p h r a g m flat a s s p r i n g a n d c o v e r a r e i n s t a l l e d .
B owl
Vent
T o c h e c k t he b o w l pro ceed as follow s:
Valve
v e n t v a l v e c l e a r a n c e ( F i g . 16),
(1 ) W i t h t h r o t t l e v a l v e s at c u r b i d l e , i t s h o u l d b e p o s s i b l e to i n s e r t a 1/16 i n c h
dia
Clearance
drill
b o w l v e n t v a l v e a n d t o p of p r i m a r y the idle speed proper ly s et.
s han k
between
f u e l b o w l , w i t h
(2 ) If an a d j u s t m e n t i s n e c e s s a r y , b e n d r od
( 5 ) A l i g n v a c u u m p o r t i n c o v e r w i t h p o r t i n h o u s i n g
1 4 -5 2
F U E L S Y S T E M — H O L L E Y 4160
c h a n g e a r c of c o n t a c t w i t h h t h r o t t l e l e v e r , u s i n g T o o l T 1 0 9 - 2 1 3 u n t i l c o r r e c t c l e a r a n c e h a s b e e n o b t a i n e d .
Checking Che cking
Bowl
Vent
Valve
Clearance
PUMP
•'ALVES
"HRC
OVERRIDE ERRI DE
(E.C.S.)
T o c h e c k t h e b o w l v e n t v a l v e c l e a r a n c e a d j u s t m e n t , p r o c e e d as f o l l o w s : (1 ) W i t h t h e t h r o t t l e v a l v e s at c u r b i d l e , i t s h o u l d be poss ible e t r 72 (.005 t o t o i n s e r t a n u m b e r 72 d r i l l s h a n k (.005 t . 02 0 2 5 i n c h ) b e t w e e n b o w l v e n t v a l v e p l u n g e r s t e m a n d o p e r a t i n g r o d , ( F i g . 16).
GAUGE :
(2 ) If an a d j u s t m e n t i s n e c e s s a r y , b e n d r od
to
c h a n g e ar c of c o n t a c t w i t h t h r o t t l e l e v e r , u s i n g T o o l T 1 0 9 - 2 1 3 , u n t i l c o r r e c t c l e a r a n c e h as b e e n
Checking To
Accelerator
Pu mp
Lever
ch eck acc elerator pum p
lever
obt ained. P OVERRI OVERRIDE DE
4
Clearance
.•STING SCREW
c l e a r a n c e ( Fi g.
1 7 ) , p r o c e e d as f o l l o w s : h t h r o t t l e v a l v e s w i d e o p e n , a n d t h e p u m p (1 ) W i t h
l e v e r h e l d d o w n , i t s h o u l d b e p o s s i b l e t e t o i n s e r t a .0 15 an d l e v e r . i n c h g a u g e b e t w e e n a d j u s t i n g n u t an
(2 ) I f an a d j u s t m e n t i s n e c e s s a r y , a d j u s t p u m p o v e r
Fig. 17—Checking Accelerator Quali fyi ng
Choke
Pu mp Lever
Control
NP769B
Clearance
Lever
A d j u s t m e n t o f t h e c h o k e c o n t r o l l e v e r r i s n e c e s s a r y to prov ide
cor rec t relations hip between c hok e valv e,
r i d e s c r e w u n t i l c o r r e c t c l e a r a n c e h as b e e n o b t a i n e d . ( 3 ) T h e r e m u s t be no f r e e m o v e m e n t of p u m p
. It t h e r m o s t a t i c c o i l s p r i n g a n d t h e f a s t i d l e c a m . It s h o u l d b e c h e c k e d a n d a d j u s t e d (i f n e c e s s a r y ) after
l e v e r a g e w h e n t h r o t t l e i s at at c u r b i d l e .
carbu retor
a s s e m b l y o r as p r e p a r a t i o n of t h e c h o k e
s y s t e m l i n k a g e b e f o r e m a k i n g t h e V a c u u m K i c k , C a m ADJUST VENT
DRILL O-
•/AI.VE R OD HERE
GA J G ' £
P o s i t i o n o r U n l o a d e r A d j u s t m e n t . T h e s e t h r e e a d j u s t m e n t s m u s t an d s h o u l d b e m a d e after q u a l i f i c a t i o n o f the cho ke co ntro l lever.
> T
4
7
(1)
O p e n t h e t h r o t t l e t o m i d - p o s i t i o n .
(2 ) C l o s e t h e c h o k e v a l v e b y s l i g h t
p r e s s u r e o n
ch oke co ntro l lever. (3 ) T h e t op of c h o k e e r o d h o l e i n c o n t r o l
lever
s h o u l d b e 1-11/16 ± 1 / 6 4 4 i n c h a b o v e c h o k e a s s e m b l y BOWL
( c a r b u r e t o r r o n e n g i n e ) ) o r 1-23/32 ± 1 / 6 4 4 i n c h a b o v e
VENT
c a r b u r e t o r b a s e ( C a r b u r e t o r o n b e n c h ) ( F i g . 18).
VALVE
7 % -
CARBURETOR
SEAT SEAT ON AIR
p
IDENTIFICATION I
HORN
NUMBER
C.A.S. CARBURETOR
BOWL V E N T V A L V E PL UNGER STEM
( 4 ) A d j u s t i f n e c e s s a r y b y b e n d i n g c h o k e s h a f tt r r o d at point indi cated .
THROTTLE VALVES IN IN
CA U TI ON: Improper Improper bend bending ing will cause b binding inding of
CLOSED
POSfT fTiO iON
NP768C
BOWL V E N T V A L V E OPERATI NG ROD
r o d . Test f or fr ee movement between open open an d closed TO ADJUST, ADJUST, A T THIS
M M 6
T OP EDGE OFCHOKE
BEND BEND
OLE CONTROL ROD HOL
POINT POI NT
I NCH < 1/6 4 IN
ABOVE CHOKE ASSEMBLY (CARBURETOR ON E NG I NE )
E.CS. C ARB URETOR
THROTTLE V A L V E S AT CLOSED CURB IDLE
PY873
>f
~
~
1-23/32
- i -
1/64 INCH
(CARBURETOR (CARBURETOR ONBENCH NR452A
to
Fig. 16—Checking 16—Checking B owl Vent Valv e (C.A.5. an and d E.C.S.)
Clearance
Fig. 18—Qual if ying
Choke Control
Lever
• H O L L E Y 4 1 6 0 — F U E L S Y S T E M 14-53 c h o k e p o s i t i o n s an d r e b e n d if n e c e s s a r y to e l i m i n a t e any interferences. Choke
Unloader
Adjustment
(w ide
open
FAST IDLE CA M
kick)
IGHEST 2 N D HIG
T h e c h o k e u n l o a d e r i s a m e c h a n i c a l d e v i c e t o p a r
P SPEED STE
t i a l l y o p e n t h e c h o k e at w i d e o p e n t h r o t t l e. It i s u s e d
t o e l i m i n a t e c h o k e e n r i c h m e n t d u r i n g c r a n k i n g of a n e n g i n e . E n g i n e s w h i c h h a v e b e e n f l o o od de ed d or s t a l l e d b y e x c e s s i v e c h o k e e n r i c h m e n t c a n b e c l e a r e d b y u s e (1)
if
li ^<
FAST IDLE IDLE SPEED 7
Q u a l i f y t h e c h o k e c o n t r o l l e v e r , i f n e c e s s a r y .
T SC REWDR IVER USTMENT
1
.
'/via
ADJU ADJUS STI NG T ANG
o f t h e u n l o a d e r . A d j u s t t h e s y s t e m a s f o l l o w s .
^
»
A
( S e e Q u a l i f y i n g C h o k e C o n t r o l L e v e r P a r a g r a p h ) .
(2 ) H o l d t h e t h r o t t l e v a l v e s i n t h e w i d e o p e n p o s i t i o n . In I n s e r t t h e s p e c i f i e d d r i l l b e t w e e n t h e u p p e r e d g e o f t h e c h o k e v a l v e a n d t h e i n n e r w a l l of t h e a i r h o r n ( s e e s p e c i f i c a t i o n s ) .
(3 ) W i t h h a f in g e r l i g h t l y p r e s s i n g a g a i n s t t h e c h o k e c o n t r o l l e v e r , a s l i g h t d r a g s h o u l d b e f e l t a s t h e d r i l l i s b e i n g
w i t h d r a w n . If an a d j u s t m e n t i s n e c e s s a r y ,
b e n d t h e i n d i c a t e d
t a n g u n t i l c o r r e c t
o p e n i n g has
b e e n o b t a i n e d ( F i g . 19).
Fast
FAS T IDLE SPEED LEVER
Idle Spee Speed d
F a s t i d l e
Adjustment
engine
(On
Vehicle)
s p e e d i s u s e d to o v e r c o m e
cold
e n g i n e f r i c t i o n , s t a l l s after c o l d s t a r t s a n d s t a l l s be c a u s e of c a r b u r e t o r i c i n g . Set t h i s a d j u s t m e n t after
t h e v e h i c l e o d o m e t e r i n d i c a t e s o v e r 500 m i l e s t o i n s u r e a n o r m a l e n g i n e f r i c t i o n l e v e l . P r e p a r e t h e e n
g i n e b y d r i v i n g at l e a s t 5 m i l e s . C o n n e c t a t a c h o m e t e r a n d s e t t h e c u r b i d l e s p e e d a n d m i x t u r e , t h e n p r o c e e d a s f o l l o w s :
(1 ) W i t h t h e e n g i n e o ff ff a n d t h e t r a n s m i s s i o n i n t h e P A R K o r N E U T R A L
p os i ti o n ,
o p e n t h e t h r o t t l e
NP772B
Fig. 20—Fa st Idle Spee Speed d A djus djustment tment
(2 ) C l o s e c h o k e v a l v e u n t i l f a s t i d l e s c r e w t a n g c a n
Vehicle)
s p e e d . B e n d t h e f a s t i d l e t a n g b y u s e of a s c r e w d r i v e r p l a c e d i n t h e t a n g s l o t t o s e c u r e t h e s p e c i f i e d s p e e d . *
C A U T I O N : B e n d o n l y in a d i r e c t i o n p e r p e n d i c u l a r t o t h e c o n t a ct c t s u r f a c e of t h e c a m . M o v e m e n t i n a n y o t h e r d ir i r e cctt iioo n c ha h a ng n g eess t h e C A M P O S I T I O N A D J U S T M E N T described earlier. (4)
S t o p p i n g t h e e n g i n e b e t w e e n a d j u s t m e n t s i s n o t
i o n t h e f a s t i d l e t a n g on n e c e s s a r y . H o w e v e r , r e p o s i t io t h e c a m after e a c h s p e e d a d j u s t m e n t to p r o v i d e c o r r e c t t h r o t t l e c l o s i n g t o r q u e .
Fast Idle Cam Position T h e f a s t i d l e
slightly.
(On
engine
Adjustment speed adju stm ent
s h o u l d b e
m a d e on the v e h i c l e as d e s c r i b e d i n t h e F a s t Idle
b e p o s i t i o n e d o n t h e s e c o n d h i g h e s t - s p e e d s t e p of t h e
on t h e v e h i c l e ) p a r a g r a p h . H o w S p e e d A d j u s t m e n t ( on
f a s t i d l e c a m ( F i g . 20). ( 3 ) S t a r t t he e n g i n e an d d e t e r m i n e t h e s t a b i l i z e d
e v e r , t h e F a s t I d l e C a m P o s i t i o n A d j u s t m e n t c a n b e m a d e o n t h e b e n c h . T h i s a d j u s t m e n t i s i m p o r t a n ntt to a s s u r e that t h e s p e e d s of e a c h s t e p of t h e c a m o c c u r
fr~-GA fr ~-GAUGE CHOKE
OR
DRI DRILL LL
VALVE
a t t h e p r o p e r t i m e d u r i n g e n g i n e w a r m - u p . (1)
Q u a l i f y t he c h o k e c o n t r o l
l e v e r , i f n e c e s s a r y .
( S e e Q u a l i f y i n g t h e C h o k e C o n t r o l L e v e r P a r a g r a p h ) .
(2 ) W i t h f a s t i d l e s p e e d a d j u s t i n g t a n g
WALL OFAIR OFAI R-
s e c o n d h i g h e s t
HORN
c h o k e v a l v e
speed
ste ep p o n f a s t
con tacting
i d l e c a m , m o v e
t o w a r d t he c l o s e d p o s i t i o n w i t h h l i g h t
p r e s s u r e o n c h o k e c o n t r o l l e v e r .
( 3) 3) I n s e r t s p e c i f i e d d r i l l b e t w e e n t h e c h o k e v a l v e SEND AT THS POINT CHOKE- CHOKE
a n d w a l l o f t h e a i r h o r n ( s e e s p e c i f i c a t i o n s ) . A n a d j u s t m e n t w i l l b e n e c e s s a r y i f a s l ig i g h t d r a g i s
^
n o t o b t a i n e d a s t h e d r i l l i s b e i n g r e m o v e d .
CONTROL LEVER
(4 ) T o a d j u s t , b e n d t h e i n d i c a t e d t a n g ( F i g . 2 1 ) u n t i l t h e c o r r e c t c h o k e v a l v e o p e n i n g h a s b e e n o b t a i n e d .
\ -
Va cuum Kick ( O N or OFF
THROTTLE VAL VALVES VES WIDE WID E OPEN
POSI SITI TION ON
NR453A
Adjustment Vehicle)
T h e c h o k e d i a p h r a g m a d j u s t m e n t c o n t r o l s t h e f u e l
d e l i v e r y w h i l e t h e e n g i n e i s r u n n i n g . It p o s i t i o n s t h e
Fig. I 9 - C h o f c e Unloader Adjustment Open Kick)
(W ide
* S e e s p e c i f i c a t i o n s .
1 4 -5 4
F U E L S Y S T E M — H O L L E Y 4160 DRILL OR ^GAUGE
FAST - I DLE
CAM
DRILL OR GAUGE
CHOKE VALVE
2ND HIGHEST
SPEED STEP
AIR HORN
FAST IDLE SFFFD ADJUSTING TANG
JFAST IDLE SPEED ADJUSTING TANG
CAM POSHON ADJUSTING TANG
7
^FAST IDLE CAM
VAC UUM DIAPHRAGM
STEM RETRAC TED)
BEND AT POIN T THIS POINT
LIGHTLY
PRESS
UP ON CHOKE
2ND
C HOK E C ONT R OL LEVER (LIGHT CLOSING PRESSURE)
F i g . . 2 1 — F a s t I d l e C o m Position
HIGHEST
SPEED STEP
v e h i c l e o r v e h i c l e t o
be adjusted. (1 ) I f t h e a d j u s t m e n t i s t o b e m a d e w i t h t h e e n g i n e r u n n i n g , p o s i t i o n t h e f a s t i d l e t a n g ( F i g . 2 1 ) ( C a m
p o s i t i o n a d j u s t m e n t ) t o a l l o w c h o k e c l o s u r e t o k i c k s o u r c e i s t o b e u s e d ,
o p e n t h r o t t l e v a l v e s , ( e n g i n e n o t r u n n i n g ) a n d m o v e c h o k e e t o c l o s e d p o s i t i o n . R e l e a s e t h r o t t l e f i r s t ,
then
r e l e a s e c h o k e .
( 2 ) W h e n u s i n g a n a u x i l i a r y v a c u u m s o u r c e , d i s c o n
A d j u st st m e n t
R e i n s t a l l t h e v a c u u m h o s e o n t h e c o r r e c t c a r
b u r e t o r
k i c k a d j u s t m e n t . V a c u u m c a n b e s u p p l i e d b y a d i s
p o s i t i o n . . I f a u x i l i a r y v a c u u m
F i g . 2 2 — V ac u u m K i c k (5)
Adjustment
m u s t b e e n e r g i z e d t o m e a s u r e t h e v a c u u m
t r i b u t o r t e s t m a c h i n e , a n o t h e r
NP773B
NR454A
c h o k e v a l v e w i t h i n t h e a i r h o r n b y u s e o f l i n k a g e b e t w e e n t h e c h o k e s h a f t a n d t h e d i a p h r a g m . T h e d i a
phragm
CONTROL LEVER
fitting.
(6 ) M a k e t h e f o l l o w i n g c h e c k . W Wii t h n o v a c u u m ap p l i e d t o t h e d i a p h r a g m , t h e C H O K E V A L V E S H O U L D M O V E F R E E L Y b e t w e e n t h e o p e n a n d c l o s e d p o s i t i o n s . . I f m o v e m e n t i s n o t f r e e , e x a m i n e t h e l i n k a g e
f o r m i s a l i g n m e n t o r i n t e r f e r e n c e s c a u s e d b y t h e b e n d i n g o p e r a t i o n . R e p e a t t h e a d j u s t m e n t i f n e c e s s a r y t o provid e pro per link operation.
Secondary Seco ndary
Throttle
Adjustment
T h i s a d j u s t m e n t n o l o n g e r r e q u i r e d a s v a l v e s a r e
p r e - a d j u s t e d a n d n e e d n o f u r t h e r
Idle Spee Speed d
Adjustment
(Curb
adjustment.
Idle)
R e f e r r t o G e n e r a l I n f o r m a t i o n a t f r o n t o f G r o u p .
n e c t t h e v a c u u m h o s e f r o m t h e c a r b u r e t o r a n d c o n n e c t i t t o t h e h o s e f r o m t h e v a c u u m s u p p l y w i t h a s m a l l l e n g t h o f t u b e t o a c t a s a fitting. R e m o v a l o f
the
h o s e f r o m t h e d i a p h r a g m m a y r e q u i r e
forces
w h i c h d a m a g e t h e s y s t e m . A p p l y a v a c u u m o f 1 0 o r
m o r e i n c h e s o f h o s e . (3)
I n s e r t t h e s p e c i f i e d d r i l l (see s p e c i f i c a t i o n s ) b e
Checking
W et Fuel Level (O (On n
p r e s s u r e t o b e c e r t a i n 5 p o u n d r e a d i n g i s o b t a i n e d .
T o c h e c k w e t f u e l l e v e l , r e m o v e l o w e r b o l t f u r t h e s t f r o m f u e l s u p p l y ( P r i m a r y a n d S e c o n d a r y ) a n d i n s t a l l C-4051 w e t f u e l l e v e l g a u g e ( F i g . 23). A s s c r e w i s b e-
t w e e n t h e c h o k e v a l v e a n d t h e w a l l o f t h e a i r h o r n . ( F i g . 22). A p p l y
s u f f ic ic i e n t
closing
p r e s s u r e on th e
l e v e r t o w h i c h t h e c h o k e r o d a t t a c h e s t o p r o v i d e a
mi nim um
Vehicle)
B e f o r e c h e c k i n g w et f u e l l e v e l , c h e c k t h e f u e l p u m p
SECONDARY Fi.'H BOWL W ET LEVEL
PRIM AT AT-'Y -'Y F BOW
GAUGE
c h o k e v a l v e o p e n i n g w i t h o u t d i s t o r t i o n o f
t h e d i a p h r a g m l i n k . Note that t h e c y l i n d r i c a l s t e m o f t h e d i a p h r a g m w i l l e x t e n d a s a n i n t e r n a l
s p r i n g i s
c o m p r e s s e d . T h i s s p r i n g m u s t b e f u l l y c o m p r e s s e d f o r
1 r
p r o p e r m e a s u r e m e n t o f t h e v a c u u m k i c k a d j u s t m e n t . (4 ) A n a d j u s t m e n t w i l l b e n e c e s s a r y i f a s l i g h t d r a g i s n o t o b t a i n e d as t h e d r i l l i s b e i n g r e m o v e d . S h o r t e n o r l e n g t h e n t h e d i a p h r a g m l i n k t o o b t a i n t h e c o r r e c t
•AKE
c h o k e o p e n i n g . L e n g t h c h a n g e s s h o u l d b e m a d e b y
c a r e f u l l y o p e n i n g o r c l o s i n g t h e b e n d p r o v i d e d i n t h e d i a p h r a g m l i n k . C A U T I O N : D O N OT A P P L Y T W I S T
READING
O N GRADUATED
NP788B
SCALE
I N G O R B E N D I N G F O R C E T O D I A P H R A G M .
F i g . 23—Checking Wet fuel Level (on Vehicle)
A
F U E L P U M P — F U E L L S Y S T E M
1455
ing rem ove d, fuel wi ll be lost. Start o r cra nk engine
b e n d t a n g o n float u n t i l c o r r e c t s p e c i f i c a t i o n s a r e o b
a n d a l l o w f u e l b o w l s t o f iill l.l. T h e r e a d i n g o n l e v e l g a u g e
tained.
s h o u l d b e 9 / 1 6
for Pri m ary
and
13/16
i n c h f o r S e c
o n d a r y , w i t h 5 p o u n d s f u e l p u m p p r e s s u r e . *
*Fuel level will vary 1/32 inch tor every pound of fuel pump pres sure sure under or ov er s pec ific ations .
I f a n a d j u s t m e n t i s n e c e s s a r y r e m o v e f u e l b o w l a n d
FUEL PUMP 1NDEI Page 57 57 55
67 7A) A s s e m b l i n g F u e l P u m p ( R D - 2 6 D i s a s s e m b l i n g Fu el Pu m p (RD-267A) G e n e r a l I n f o r m a t i o n
GEN ERA L
Page 55 67 56
S e r v i c e D i a g n o s i s S p e c i f i c a t i o n s T e s t i n g F u e l P u m p ( o n c a r )
IN F ORM A TION or
t h e c a m s h a f t a n d t h e f u e l p u m p r o c k e r ar m . ) T h i s a c
A i r t e x R D - 2 6 7 A ( O p t i o n a l ) ( F i g s . 1 o r 2 ) , i s u s e d o n a l l
t i o n lil i f t s t h e p u l l r o d a n d d i a p h r a g m u p w a r d s a g a i n s t
F u e l p u m p Model M S - 4 5 8 9 S A C h r y s l e r a n d I m p e r i a l
and
MS-4845S
eng ines. Th e MS-4589SA
the fuel pum p m ain sp ring , thus creating a vac uu m
and
MS-4845S fu el pum p are of the pr es se d stee l type an d
in the valve hous ing and opens the inlet valve
c a n n o t b e d i s a s s e m b l e d f o r s e r v i c e . I f
a pu mp
mal
fuel is dr aw n into the valve hous ing ch amb er. On the
f u n c t i o n o c c u r s , r e m o v e t h e o l d p u m p
and
install a
n e w o n e . A i r t e x M o d e l R D - 2 6 7 A ( O p t i o n a l ) i s s e r v i c e
r e t u r n s t r o k e th e m a i n s p r i n g f o r c e s t h e d i a p h r a g m t o t h e d o w n p o s i t i o n , w h i c h c l o s e s t h e i n l e t v a l v e
able.
and
The
fuel
pum ps
are driv en
by
an
eccentric
thro ug h
cam
t h a t i s c a s t o n t h e c a m s h a f t i n t h e 3 8 3 a n d 4 4 0 c u b i c
The
on
the
pum p
roc ker
arm .
((O On
the
383
f u e l filter s h o u l d b e
housi ng ch am ber f u e l filter a n d
the
chan ged
e v e r y 24,000
a l l t i m e s . D o n o t attempt to clean.
and
DIAGNOSIS Correction
F U E L P U M P L E A K S FUEL
(a) Worn , ruptu red or torn di aph rag m. (b ) L o o s e d i a p h r a g m m o u n t i n g p l a t e s . ( c ) L o o s e i n l e t o r o u t l e t l i n e f i t t i n g s .
F U E L P U M P L E A K S OIL
(a) C r a c k e d o r
deterio rated
pull
rod
(a) Install new pu m p. (b ) I n s t a l l n e w p u m p . (c) Tighten line fittings. oil
seal. ( b ) L o o s e r o c k e r a r m p i v o t p i n . ( c ) L o o s e p u m p m o u n t i n g b o l t s .
(d) F a u l t y p u m p t o b l o c k g a s k e t . s i n t a n k o r f i l l e r c a p r e s t r i c t e d . ( a ) V e n t s ( T h i s w i l l a l s o c a u s e c o l l a p s e d f u e l tank.) (b ) L e a k s i n f u e l l i n e o r f i t t i n g s . ( c ) D i r t o r r e s t r i c t i o n i n f u e l t a n k .
(a) Insta ll new
pump,
( b ) IIn nst all new p um p. ( c ) T i g h t e n m o u n t i n g b o l t s s e c u r e l y . (d) Inst all new ga sk et. ( a) a) I n s t a l l n e w c a p , o r u n p l u g v e n t s a n d i n s p e c t t a n k f o r l e a k s .
(h) Low pr ess ur e. ( i) i) I n c o r r e c t f u e l p u m p , ( j) j ) R e s t r i c t e d f u e l filter.
(b) Tighten line fittings. ( c ) I n s t a l l n e w f u e l f i l t e r a n d c l e a n o u t tank. (d) Install new pu m p. (e) Th aw li nes and drain tan k. (f) Insta ll new fuel pum p. (g) Install heat sh ield wher e li nes or pum p are near exhaust. (h) Ins tall new fue l pu m p. ( ii)) I n s t a l l c o r r e c t f u e l p u m p , ( jj)) I n s t a l l n e w filter.
( a ) L o o s e m o u n t i n g b o l t s .
( a) a) T i g h t e n m o u n t i n g b o l t s .
(d) Worn , ruptu red, or torn di aph rag m. ( e ) F r o z e n g a s lines. (f ) I m p r o p e r l y s e a t i n g v a l v e s . (g) Vapor lock.
NOISE
valve
valve, to the
P os s i bl e C a u s e
Condition
F U E L P U M P
the
betw een
SERVICE
I N S U F F I C I E N T F U E L DELIVERY
outlet
in
lo w o f f u e l a t m i l e s , t o i n s u r e h a v i n g a n u n r e s t r i c t e d f lo
A s t h e c a m s h a f t r o ta t e s , t h e e c c e n t r i c c a m p r e s s e s
440 cub ic in c h engine, a pu sh ro d operates
the
fuel
carburetor.
i n c h e n g i n e s .
dow n
expels the
and
(b) Ins tall new fue l pum p. ( c ) I n s t a l l n e w s p r i n g .
(b) S c or ed or wor n rock er arm . (c) Weak or broken rock er arm spri ng .
14 14-5 -56 6
A
FU E L S Y S T E M — F U E L PUMP
SERW1CE PROCEDURES TESTING FUEL PUMP (On Car) I f
Volume
t h e f u e l p u m p f a i l s s to to s u p p l y f u e l p r o p e r l y y to to t h e
c a r b u r e t o r , , the the f o l l o w i n g t e s t s s h o u l d be be m a d e e be be f o r e re r e m o v i n g t h e f u e l p u m p f r o m t h e v e h i c l e .
Test
T h e f u e l p u m p s h o u l d s u p p l y 1 q u a r t of f u e l l i n 1 m i n u t e or o r l e s s a t 5 0 0 r . p . m . fnfef V al v e
Test
T o t e s t t h e i n l e t v a l v e , c o n n e c t a v a c u u m g a u g e on
Pressure Test I f
l e a k a g e I e Is s n o t a p p a r e n t , t e s t p u m p f or or p r e s s u r e , as follows; ( 1 ) I n s e r t a T fitting i n f u e l l i n e a t c a r b u r e t o r , (F i g . 3). . 3). e of of h o s e e b e t w e e n T (2) (2 ) C o n n e c t a 6 I n c h p i e c e fitting a n d g a u g e C - 3 4 1 1 . (T h e h o s e s h o u l d n o t e x c e e d 6 i n c h e s . A l o n g e r h o s e m a y c o l l e c t f ue ue l a n d a d d i t i o n a l w e i g h t of f u e l w o u l d be a d d e d t o p r e s s u r e of p u m p a n d r e s u l t i n a n i n a c c u r a t e r e a d i n g . ) ( 3 ) V e n t p u m p p f or a few few s e c o n d s ( t h i s r e l i e v e s air t r a p p e d i n f u e l c h a m b e r ) . I f t h i s Is n ot d o n e , p u m p w i l l n ot o p e r a t e y a n d l ow p r e s s u r e e a t f u l l c a p a c i t y r e a d i n g w i l l r e s u l t . a t a c h o m e t e r , t h e n s t a r t e n g i n e a n d r u n (4) (4 ) C o n n e c t a a t 5 0 0 r . p . m . T . T he he r e a d i n g s h o u lld d be f r o m 3 - 1 / 2 t o 5 p .s . s . i . a n d r e m a i n c o n s t a n t t or r e t u r n to z e r o v e r y , v e r y s l o w l y w h e n e n g i n e is is s t o p p e d . A n i n s t a n t d r o p p t t o z e r o i n d i c a t e s a l e a k y o u t l e t v a l v e . I . I f p r e s s u r e e is is too l ow a ng, o orr i m p r o p e r a s s e m b l y of w e a k d i a p h r a g m m a i n s p r iin t h e d i a p h r a g m ma y be the c a u s e . . I f p r e s s u r e Is too h i g h , , m a i n s p r i n g IIss t o o s t r o n g .
t h e i n l e t fitting w h i l e t h e l i n e i s d i s c o n n e c t e d .
o v e r w i t h s t a r t i n g m o t o r . (2) T h e r e s h o u l d be a n o t i c e a b llee v a c u u m p r e s e n t , not altern ated by blowback. (3) I f b l o w b a c k k is is p r e s e n t , i n l e t v a l v e is is n o t s e a t i n g p r o p e r l y a n d a d a n e w p u m p s h o u lld d be ins talle d. (1 ) S t a r t e n g i n e o r t
I f
fuel
u r n
p u m p d o e s n ot ot p p e r f o r m t o a b o v e t e s t r e
quirem ent s,
fuel
s h o u l d be be r e m o v e d
pum p
from
vehicle.
•
"
7
V a c u u m Test The vacuum test should d be m a d e w i t h t h e f u e l l i n e d i s c o n n e c t e d f r o m t h e c a r b u r e t o r . ( T h i s w i l l a l l o w t h e p u m p p to o p e r a t e a t f u l l c a p a c i t y , w h i c h h i t m u s t t do t o p r i m e a d r y c a r b bu u r e t o r. r. T h e m i n i m u m r e a d i n g s h o u l d b e at l e a s t 10 i n c h e s of v a c u u m at 5 at 500 0 r . p . m . w i t h t h e 10 i f u e l l i n e d i s c on on n e c t e d
NR2A
em b l y (R D - 2 6 7 A ) O p t i o n al 383 Fig. 2 - F u e l Pu m p A s s em a nd 440 C Cu. u. In. Engine
a t t h e c a r b u r e t o r ..))
R.P.M
TACHOMETER (ENGINE SPEED)
NH415B
KR345A
m b l y (383, and 440 Cu. In. Fig. 1—Fuel Pu m p A s s eem
Fig. 3—Pressure Testing Fuel
Engine)
Pump
A
FUEL
TANK—FUEL
S Y S T E M 14-57
r o d ) i n h o u s i n g f o r d e t e r i o r a t i o n . I f u n f i t f o r f u r t h e r
DIIS SASSEMBLIIN N G FU EL PUMP (RD-267A)
a n n e w r o c k e r a r m h o u s i n g . C h e c k the s e r v i c e , i n s t a l l a
B e f o r e d i s a s s e m b l y , m a r k k h o u s i n g s i n s u c h m a n n e r
r o c k e r a r m f o r s c o r i n g o r g a l l i n g on th e c a m s h a f t
l l i n e t h a t t he m a r k " I n l e t " w i l l be f a c i n g i n l e tt f u e l
p u s h r o d b e a r i n g s u r f a c e .
w h e n r e a s s e m b l e d . T h i s i s i m p o r t a n t (1) G r i n d o r file off p e e n e d e n d of p i v o t p i n , t h e n ,
ASSEMBLIN ING FUEL PUMP ( 1 ) A s s e m b l e r o c k e r a r m b y s l i d i n g t h e p u l l ar m
d r i v e ou t p i v o t p i n . R e m o v e w a s h e r . ( 2 ) R e m o v e r o c k e r a r m f o l l o w e r s p r i n g .
i n t o e c c e n t r i c c a m a n d i n s t a l l s l e e v e . (B e s u r e t he
(3)
h o o k o n t h e a r m i s f a c i n g u p ) .
R e m o v e s c r e w s h o l d i n g r o c k e r a r m h o u s i n g t o
(2)
v a l v e b o d y . S e p a r a t e b o d y an d h o u s i n g . (4 (4)) P r e s s in o n d i a p h r a g m a n d d i s e n g a g e
arm
from
diaphragm
roc ker
p u l l r o d . R e m o v e r o c k e r ar m
G r e a s e s p a c e r w a s h e r s a n d s l i d e o v e r e a c h s i d e
of sleev e sho ulder . ( 3 ) I n s t a l l d i a p h r a g m an d s p r i n g r o c k e r a r m h o u s ing.
a n d s p a c e r w a s h e r s . ( 5 ) S l i d e d i a p h r a g m an d s p r i n g o u t o f r o c k e r a r m
(4 (4)) S l i d e r o c k e r a r m i n p o s i t i o n an d e n g a g e
o f a r m w i t h s l o t i n p u l l r o d . ( C o m p r e s s d i a p h r a g m
housing.
( 6 ) R e m o v e s l e e v e f r o m t w o p i e c e r o c k e r a r m , t h e n s e p a r a t e r o c k e r a r m p u l l l e v e r f r o m e c c e n t r i c a r m .
a n d s p r i n g t o e n g a g e a r m w i t h p u l l ro d. ) ( 5 ) U s i n g s u i t a b l e d r i f t , a l i g n r o c k e r a r m an an d w a s h e r s t h e n
C l e an i n g
F u e l Pu m p
i n s t a l l p i v o t p i n . I n s t a l l
retaining
w ash er,
t h e n p e e n p i v o t p i n t o r e t a i n .
Par t s
( e x c e p t d i a p h r a g m ) i n a C l e a n al l f u e l p u m p p a r t s (e s u i t a b l e s o l v e n t , t h e n b l o w d r y w i t h c o m p r e s s e d a i r . C h e c k t h e c o n d i t i o n of of t h e v a l v e s e a t s a n d p a r t s f o r
g u m d e p o s i t s . I f g u m d e p o s i t s a r e f o u n d , r e m o v e w i t h denatured
hook
a l c o h o l . I f t he v a l v e s ar e b a d l y w o r n o r
d a m a g e d , i n s t a l l a c o m p l e t e n ew v a l v e b o d y a s s e m b l y . The valves ar e not serviced individually. E x a m i n e t h e d i a p h r a g m f o r c r a c k s , t o r n s c r e w h o l e s o r r u p t u r e s . C h e c k t he r u b b e r oi l s e a l ( d i a p h r a g m
p ull
FUEL
( 6 ) P l a c e v a l v e b o d y o n d i a p h r a g m . A l i g n , t h e n i n stall
s c r e w s .
attaching (7) W i t h p u m p
Dra w dow n evenly. h e l d i n v i s e , c o m p r e s s r o c k e r a r m
t o i t s f u l l t r a v e l . H o l d i n t h i s p o s i t i o n , t h e n s c r e w s s e c u r e l y . ( T h i s w i l l p r e v e n t t e a r i n g
tighten
diaphrag m
w h e n p u m p i s o p e r a t e d at f u l l s t r o k e . ) (8 ) I n s t a l l p u m p a r m f o l l o w e r s p r i n g b e t w e e n r o c k e r a r m a n d h o u s i n g . (Be s u r e s p r i n g i s s e a t e d . )
( 9 ) T e s t p u m p as d e s c r i b e d p r e v i o u s l y .
TANK
(C.A.S.) CLEANER AIR SYSTEM (C.A.S.) GENERAL INFORMATION T h e f u e l t a n k on al l m o d e l s e x c e p t S t a t i o n W a g o n at t h e r e a r o f t h e b o d y , u n d e r t h e M o d e l s i s l o c a t e d at
tru nk
com partm ent
f lo lo o orr , ( F i g . 1). I n S t a t i o n W a g o n
m o d e l s , t he f u e l
t a n k i s m o u n t e d i n t h e l e f t r e a r
q u a r t e r p a n e l b e y o n d t h e w h e e l h o u s e , ( F i g . 2). vehicle i s to be stored If the vehicle be stored
or an any y appreciable
GROMMET
NK554 C
Fig. I - F u e l T an k M o u n t i n g (1 19. 5 i n c h W/B Vehicles)
1 4 -5 8
FU EL SY ST EM —F UE L TANK CAP
ASSEMB LY
T A N K A S S E M B L Y -
NR15
STRAP
y (121.5 Inch W/B Fig. 2 - f u e f T a n k A s s e m b l y
l e n g t h of t i m e , t h e g a s o l i n e s h o u l d b e d r a i n e d d f r o m t h e e n t i r e s y s t e m , i n o r d e r to p r e v e n t g u m f o r m a t i o n . I f the v e h i c l e h a s b e e n u n d e r c o a t e d , b e s u r e th e f u e l t a n k vent t u b e ( u n d e r kickup in f l o o r p a n ) i s open. I f t h i s i s not done, a c o l l a p s e d f u e l t a n k w i l l r e s u l t .
T h e f u e l t a n k k on a l l m o d e l s e x c e p t S t a t i o n W a g o n h a s a 2 4 g a l l o n (2 0 I m p e r i a l ) c a p a c i t y . T he S t a t i o n W a g o n c a p a c i t y is 22 ( 18 18 - 1 / /4 4 I m p e r i a l ) g a l l o n s . The filler tube on the c o n v e n t i o n a l m o d e l s is a c c e s s i b l e
Vehicles}
t h r o u g h t h e c e n t e r of t h e d e c k o p e n i n g l o w e r p a n e l , w h i l e the S t a t i o n W a g o n fills fills at the l e f t r e a r u p p e r
q u a r t e r r p a n e l b e t w e e n the q u a r t e r p o s t a n d the fin. T h e f u e l t a n k k is is f it it te te d w i t h a g a u g e u n i t , i n c l u d i n g the suction p pii p e , ( F i g . 3 ) . T he he filter filter on t h e e n d of t h e s u c t i o n p i p e is r e p l a c e a b l e u n i t a n d p r e v e n t s the g a t t a n k u n i t , be e n t r y of w a t e r a n d d i r t . W h e n i n s t a l l i n g a s u r e t h e filter filter is p u s h e d on t h e e n d of t h e t u b e u n t i l
seated.
S E R V I C E P R O C E D U R E S REMOVING THE F U E L T A N K (E x e m p t S t at i o n W ag o n ) C A U T I O N : B e s u r e th e i g n i t i o n s w i t c h is t u r n e d off b e f o r e d i s c o n n e c t i n g o orr c o n n e c t in in g t h e g a u g e w i r e .
( 5 ) R e m o v e t a n k g a u g e u n i t , u s i n g s p a n n e r w r e n c h T o o l C - 3 5 8 2 ( F i g . 3 ). C h e c k r u b b e r g r o m m e t a r o u n d filler t u b e . I f c r a c k e d or d e t e r i o r a t e d , i n s t a l l l a ne w g r o m m e t a t r e a s s e m b l y .
Removal
installation
(1 ) D r a i n t a n k i n t o a s a f e t y c a n , t h e n d i s c o n n e c t f u e l l i n e a n d w i r e l e a d t o g a u g e u n i t . (2 ) D i s c o n n e c t v e n t t u b e at h o s e c o n n e c t i o n at
B e f o r e i n s t a l l i n g the t a n k g a u g e u n i t , c h e c k the g the c o n d i t i o n of t h e filter filter on the en d of s u c t i o n t u b e . I f t h e filter i s p l u g g e d , i n s t a l l a l a n e w filter.
of t t a n k . l e a d i n g e d g e of ( 3 ) R e m o v e s c r e w t h a t a t t a c h e s f i llll eerr t u b e b r a c k e t to rea r crossmem ber. ( 4 ) R e m o v e n u t s t h a t h o l d e n d s of f u e l t a n k h o l d d o w n s t r a p s to f r a m e . L o w e r f r o n t en d of of t a n k fa k fa r
(1 ) P o s i t i o n f u e l t a n k g a u g e u n i t i n t a n k , u s i n g a n e w g a s k e t . T i g h t e n s e c u r e l y , u s i n g T o o l C - 3 5 8 2 . (If t a n k i n s u l a t o r w was as t t o r n n or d a m a g e d d u r i n g r e m o v a l o f t a n k , , be s u r e a n d i n s t a l l l a new i n s u l a t o r at re assembly.)
e n o u g h to d i s e n g a g i l llee r t u b e f r o m r e a r p a n e l a n d gee f il s l i d e o u t f r o m u n d e r v e h i cl cl e .
k far (2 ) S l i d e f u e l t a n k u n d e r v e h i c l e . R a i s e t a n k e n o u g h to e n g a g e filler spout w i t h o p e n i n g i n r e a r
FUEL TANK FUEL SYSTEM 14-59 C UP FUEL
GAUGE GROUNDING
FUEL SUPPLY TUBE
TUBE FUEL FUEL LINE WIRING FUE FUEL L
TUBE FUEL FUEL
G A U G E J A N K
UNIT
G A U G E TA NK t
/ / //, TUBE FUEL FUEL LINE
i > J l III i>
C UP FUEL
G AUGE GROUNDING
STUD FU FUEL EL TUBE FUE FUEL L
l.OCATINC
G A U G E
TANGS
G A U G E
UNIT
NR11
Strap
( 8 ) R e m o v e l e f t r e a r b r a k e d r u m .
F L OA T
NY 1280
( 9 ) R e m o v e l e f t r e a r s p r i n g h a n g e r a t t a c h i n g b o l t s to frame.
Fig. 3 —F u el el G au g e (T an k U n i t ) l o c a t o r e m b o s s m e n t s on f lo o r p a n . p a n e l , a n d lo (3 ) P u s h t a n k
toward
r e a r t o f u l l y
s p o u t i n o p e n i n g . ( 4 ) H o l d f u e l t a n k i n t h i s
engag e
f iill le le r
p o s i t i o n , a n d p l a c e
h o l d d o w n s t r a p s i n p o s i t i o n , f e e d i n g a t t a c h i n g s t u d s h o l e s i n e n d o ff s t r a p s . I n s t a l l n u t s b u t d o
not tighten. (5)
STUD FUEL FUEL
Fig. 4—Fuel Ta nk Ground
SUC T I ON T UBE
through
G AUGE
TA NK UNIT
G u i d e b u t t o n h e a d o f s t u d s in i n t o s l o t s i n f r a m e
a n d d o w n i n t o p o s i t i o n . T i g h t e n h o l d d o w n s t r a p at t a c h i n g n u t s s e c u r e l y . (40 i n . - l b s . ) (6 ) IIn ns tall
f ilil le le r
t u b e m o u n t i n g s c r e w a n d t i g h t e n
securely.
(7 ) C o n n e c t v e n t
t u b e s a n d h o s e c o n n e c t i o n s at
l e a d i n g e d g e of t a n k .
(8 ) C o n n e c t l e a d w i r e t o t a n k
gauge
unit,
recon
n e c t f u e l l i n e a n d g r o u n d s t r a p .
(1 100 ) L o w e r h o i s t a n d a l l o w r e a r a x l e t o f a l l
aw ay
f r o m v e h i c l e f a r e n o u g h s o a s n o t t o s t r e t c h
br ake
hose.
( 11 1 1 ) R e m o v e f u e l t a n k s u p p o r t s t r a p n u t s f r o m e y e bolts.
( 12 12 ) S l i d e f u e l t a n k d o w n . W o r k f u e l
f o r w a r d a n d t i l t l e a d i n g e d g e
t a n k o u t f r o m u n d e r r e a r
quart er
panel.
( 1 3 ) L o o s e n t a n k g a u g e u n i t , u s i n g s p a n n e r w r e n c h To ol C-3582 2.. S l i d e u n i t u p a n d o u t o off t a n k .
Installation ( 1) 1) P o s i t i o n f u e l t a n k g a u g e u n i t i n t a n k , u s i n g a n e w g a s k e t . T i g h t e n s e c u r e l y , u s i n g T o o l C - 3 5 8 2. 2. (2 ) W o r k f u e l
t a n k u p i n t o
p a n e l . M o v e r e a r w a r d u n t i l
f iill lle er
p o s i t i o n i n q u a r t e r t u b e i s c e n t e r e d i n
o p e n i n g o f q u a r t e r p a n e l . P l a c e s t r a p s i n p o s i t i o n a n d i n s t a l l n u t s . T i g h t e n to 40 i n c h - p o u n d s . B o t t o m
(9 ) R e f i l l t a n k a n d c h e c k f o r l e a k s .
s h o u l d b e t i g h t e n e d
strap
f iirr st st .
( 3) 3) I n s t a l l f u e l l i n e an d c o n n e c t g r o u n d s t r a p ( F i g .
FUEL T A N K (Stati Station Wagon) (Fig. 2)
4 ) , a n d f u e l g a u g e w i r e .
Removal
w i t h f r a m e .
C A U T I O N : B e s u r e t h e I g n i t i o n S w i t c h is t u r n e d O F F b e f o r e d i s c o n n e c t i n g o r c o n n e c t i n g t h e g a u g e w i r e .
i n s t a l l a t t a c h i n g b o l t s . T i g h t e n to 30 f o o t p o u n d s .
(4 ) R a i s e h o i s t f a r e n o u g h t o e n g a g e s p r i n g h a n g e r
( 1) 1) R e m o v e
f i l lle e r c a p a n d s y p h o n f u e l i n t o
safety
can.
(2 ) R a i s e v e h i c l e o n h o i s t a n d r e m o v e f e n d e r s k i r t (if so equipped). R e m o v e s c r e w s that a t t a c h s t o n e s h i e l d t o w h e e l
h o u s e . S l i d e s h i e l d d o w n a n d a w a y f r o m v e h i c l e .
( 5 ) D i s c o n n e c t f u e l l i n e , g r o u n d s t r a p a n d g a u g e wire. (6) P l a c e s t a n d s u n d e r
f r a m e at r e a r t o s u p p o r t
v e h i c l e a s h o i s t i s l o w e r e d .
(7) R e m o v e r e a r
shoc k abso rbers low er
n u t s , t h e n s l i d e o ff l o w e r p i v o t .
( 6 ) S l i d e s h o c k a b s o r b e r s o v e r p i v o t s a n d s e c u r e w i t h n u t s . T i g h t e n to 50 f o o t - p o u n d s .
( 7) 7) I n s t a l l b r a k e d r u m o n a x l e ( 8) 8) S l i d e s t o n e s h i e l d u p i n t o
f lla a ng n g e. e. p o s i t i o n . I n s t a l l at
t a c h i n g s c r e w s a n d t i g h t e n s e c u r e l y .
( 3 ) R e m o v e l e f t r e a r t i r e a n d w h e e l . (4)
( 5 ) P o s i t i o n l e f t r e a r s p r i n g h a n g e r at f r a m e a n d
attachi ng
( 9 ) I n s t a l l w h e e l a n d t i r e a n d t i g h t e n w h e e l n u t t o 6 5 f o o t - p o u n d s , i n s e q u e n c e . ( 1 0 ) R a i s e h o i s t a n d r e m o v e c a r s t a n d s . ( 11 1 1 ) I n s t a l l f e n d e r s k i r t (if so e q u i p p e d ) a n d l o w e r v e h i c l e t o floor. ( 12 1 2 ) R e f i l l f u e l t a n k a n d c h e c k f o r l e a k s . ( 1 3 ) F o r t e s t i n g
f uel
g a u g e (tank u n i t )
E l e c t r i c a l G r o u p 8 " G a u g e s " .
r e f e r to
1 4 -6 0
FU EL SY ST EM —F U EL
TANK-
F U E L
GENERAL
T A N K S ( E .C.S.) E V A P O R A T I O N CONTROL SYSTEM
INFORMATION
C e r t a i n C h r y s l e r C o r p o r a t i o n V e h i c l e s a r e e q u i p p e d
T h e l o s s o f a n y f u e l o r v a p o r o u t o f t h e f i l l e r n e c k
with an Evaporatio n Control Sy stem (ECS ) to reduc e
i s p r e v e n t e d b y t h e u s e o f a f iill lle er c ap wh ic h w ill r e
t h e l o s s o f f u e l
atmo
l e a s e o n l y u n d e r s i g n i f i c a n t p r e s s u r e ( 1 / 2 t o 1 p s i ) o r
s p h e r e b y e v a p o r a t i o n . T h i s i s a c l o s e d s y s t e m w h i c h
v a c u u m (1/4 to 1/2 psi). Th is cap is identif ied b y the
c o n t r o l s f u e l
w o r d s p r e s s u r e - v a c u u m a n d m u s t b e r e p l a c e d b y a
from
expans ion
e m i s s i o n s f r o m
the
v a p o r s p a s s t h r o u g h
way
of
the
the
fuel
and
feeds fuel
car bu reto r
or
v ent lines to
cr ank ca se inlet
v a p o r s a r e t w o
sys tem to the
to fou r
air
evaporation
fuel
tank.
T he
the cr ank cas e by
c l e a n e r . S i n c e f u e l
tim es he avi er th an
air,
s i m i l a r u n i t i f r e p l a c e m e n t i s n e c e s s a r y , i n o r d e r f o r
t h e s y s t e m t o r e m a i n e f f e c t i v e ( F i g . 1 )).. B e c a u s e t h e f u e l t a n k i s flat o n t o p , f o u r v e n t s a r e
the y
u s e d , o n e
in eac h co rn er
a v a p o r - l i q u i d s e p a r a t o r b y r u b b e r hose s.
of the
tank
and
are c o n
s e t t l e t o t h e b o t t o m o f t h e c r a n k c a s e . W i t h t h e e n g i n e
n e c t e d t o
r u n n i n g tth he fue l vapo rs are pur ged
from
T h e v a p o r - l i q u i d s e p a r a t o r i s a p i e c e o f t w o i n c h s t e e l
c a s e a n d t o g e t h e r
cran kc ase vapo r
tubin g mo unted
at an angle ins ide the trun k of
a r e d r a w n v i a t h e c r a n k c a s e v e n t i l a t i o n s y s t e m , w h i c h
v e h i c l e ( q u a r t e r
panel), wh ic h intern ally
i s a n e x i s t i n g p a r t o f t h e C l e a n e r A i r
Sys tem (CA S)
vent lines fro m the tank and a vent line wh ic h leads
into the base of the carb ure tor to be bu rn t by eng ine
to the cr ank ca se inlet air clean er. The se lines are of
combustion. of f u e l i n a f u l l f u e l T h e p o s s i b l e e x p a n s i o n of
differen t h eigh ts so the tank wi ll alw ays be v ent ed r e g a r d l e s s o f v e h i c l e a t t i t u d e a n d f u e l v a p o r w i l l b e
wit h
the
norm al
the crank
tank,
hold s
the four
t r a n s f e r r e d t o t h e c r a n k c a s e . O n e v e n t l i n e f r o m
the
g a l l o n o v e r -f -f i l l l i m i t e r t a n k i n s i d e t h e m a i n f u e l t a n k
tank i s sho rt to pro vid e a dr ain bac k to the tan k
for
w h i c h f iill l s m u c h s l o w e r t h a n t h e m a i n t a n k . W h e n
any liquid fuel whi ch may get into the separator dur
due to a ris e in tem per atu re, is allo wed fo r by a
1 .4 .4 the
m ain tank is filled, it rem ain s essentially emp ty to al
ing
man euv ers or inc line park ing . Th e vent
to
the
low for t her ma l exp ansio n (Fig. 1 1)) .
c r a n k c a s e i s a t t h e h i g h e s t p o i n t i n t h e s e p a r a t o r a n d CRANKCASE AIR CLEANER VAPOR-LIQUID SEPARATOR
VENT-LIQUID RETURN LINE PCV
PRESSURE VACUUM RELIEF CAP
VALVE
THERMAL EXPANSION VOLUME TANK
PY940
Fig. 1—Eva poration
Cont Controi roi
System System
F U E L T A N K — F U E L S Y S T EM
14-61
h a s a s m a l l o r i f i c e t o m i n i m i z e l i q u i d f u e l t r a n s f e r t o
d e r e n g i n e s t h i s i s a c c o m p l i s h e d v i a a h o s e c o n n e c
t h e c r a n k c a s e ( F i g . 1).
t i o n f r o m t h e c a r b u r e t o r b o w l t o t h e c r a n k c a s e iin nlet
T h e E C S s y s t e m a llss o i n c l u d e s c l o s e d v e n t i l a t i o n of
a i r c l e a n e r .
f u e l v a p o r f r o m t h e c a r b u r e t o r b o w l . O n ei ei g h t c y l i n
SERVICE
DI A GN OSI S
T h e E C S s y s t e m s h o u l d n o t r e q u i r e an y m a i n t e
(3 ) A l l E C S l i n e s p l u g g e d b e t w e e n f u e l t a n k and
n a n c e i n n o r m a l s e r v i c e . A n y l o s s of f u e l o r v a p o r f r o m t h e f u e l
the
vapor separator.
f i llll er e r c ap w o u l d i n d i c a t e one or m o r e of
( 4 ) P l u g g e d E C S l i n e s b e t w e e n t h e v a p o r s e p a r a t o r
following:
a n d t h e c r a n k c a s e ai r i n l e t filter.
(1 ) A n u n s a t i s f a c t o r y s e a l b e t w e e n c a p a n d filler
(5 ) P l u g g e d f u e l t a n k e x p a n s i o n c h a m b e r i n l e t h o l e
neck.
i n m a i n t a n k . A r e m o v a b l e p l u g i s p r o v i d e d i n th e top
(2 ) A m a l f u n c t i o n of E C S c a p r e l e a s e v a l v e .
s u r f a c e o f E C S f u e l
t a n k s , f o r a c c e s s t o e x p a n s i o n
A q u i c k c h e c k o f t h e E C S f u e l c a p m a y b e m a d e b y
c h a m b e r i n e v e n t of p l u g g i n g o f i t s f i l l / d r a i n
h o l e . If
p l a c i n g a g a i n s t t h e m o u t h an d b l o w i n g i n t o t h e h o l e
p u r g i n g o f t h e f u e l t a n k i s r e q u i r e d , t h e e x p a n s i o n
i n t h e r e l e a s e v a l v e h o u s i n g . A n i m m e d i a t e l e a k w i t h
c h a m b e r m u s t b e p u r g e d s e p a r a t e l y t h r o u g h th e top
light
a c c e s s p l u g h o l e .
b l o w i n g o r l a c k of r e l e a s e w i t h h a r d
blowing
i n d i c a t e s a d e f e c t i v e o r i n c o r r e c t u n i t .
SERVICE T h e f u e l t a n k o n a ll m o d e l s e x c e p t S t a t i o n
PROCEDURES
Wag on
If the vehicle is to be s t o r e d for any appreciable
M o d e l s i s l o c a t e d a t t h e r e a r o f t h e b o d y , u n d e r the
length of time, the gasoline should be drained from
tru nk
W ago n
t h e e n t i r e s y s t e m , in o r d e r to p r e v e n t g u m f o rm rm a t i o n .
t a n k i s m o u n t e d i n t h e l e f t r e a r
I f the vehicle has been u n d e r e o a t e d , be sure the fuel
com partm ent
m o d e l s , t h e f u e l
f lo lo o orr , (Fi g. 1). In S t a t i o n
q u a r t e r p a n e l b e y o n d t h e w h e e l h o u s e , ( F i g . 2). FRAME
u n d e r k i c k u p i n f l o o r pan) is open. I f t a n k v e n t tube ((u
BRACKET
WHEELHOUSE Z
— S C R E W (4)
GASKET F IILL L ER ER T U B E -
CLAM P CROSS
VAPOR TUBES
MEMBER SIDE RAIL INSULATOR
F
$ PAN L
(
O
R
^X^SHIELD HOSE
CLAMP
SIDE
EXTENSION PY878
l Tank As semb sembly ly F i g . I — F u e l
(E. C.S.) Evaporation
Control
System—Sedans
14-62
FU EL
SY ST EM —FU EL
TAN NK KWHEELHOUSE
GROMMETS
VAPOR TUBE T O F R O N T OF V E H I C L E PY879
Fig. 2 — Fuel Ta nk Asemh l y
(E.C.S.) Eva por a tion
, a collapsed fuel t a n k will r e s u l t . this i s not d o n e , a this T h e f u e l t a n k o n a l l m o d e l s e x c e p t S t a t i o n W a g o n h a s a 23 g a l l o n (20 I m p e r i a l )
c a p a c i t y . T h e S t a
t i o n W a g o n c a p a c i t y i s 2 2 ( 1 8 - 1 / 4 I m p e r i a l ) g a l l o n s .
Contr ol System—Sta tion
W a gons
( 4 ) R e m o v e n u t s t h a t h o l d e n d s o f f u e l t a n k
hold
d o w n s t r a p s t o f r a m e . L o w e r f r o n t e n d o f t a n k f a r e n o u g h t o d i s e n g a g e f iill lle er tube from
r e a r p a n e l a n d
s l i d e o u t f r o m u n d e r v e h i c l e .
t u b e o n t h e c o n v e n t i o n a l m o d e l s i s a c
( 5 ) R e m o v e t a n k g a u g e u n i t , u s i n g s p a n n e r w r e n c h
c e s s i b l e t h r o u g h t h e c e n t e r o f t h e d e c k o p e n i n g l o w e r
T o o l C - 3 5 8 2 ( F i g . 3). C h e c k r u b b e r g r o m m e t a r o u n d
p a n e l , w h i l e t h e S t a t i o n W a g o n
filler
T h e f i l l e r
f ilil l s a t t h e l e f t r e a r
u p p e r q u a r t e r p a n e l b e t w e e n t h e q u a r t e r p o s t a n d t h e
t u b e . I f c r a c k e d o r d e t e r i o r a t e d , i n s t a l l a n ew
g r o m m e t at r e a s s e m b l y .
fin. T h e f u e l t a n k i s fitted w i t h a g a u g e u n i t , i n c l u d i n g
t h e s u c t i o n p i p e , ( F i g . 3). Th e filter on t he end of t he s u c t i o n p i p e i s r e p l a c e a b l e u n i t a n d p r e v e n t s t h e e n t r y
Insta l l a tion B e f o r e i n s t a l l i n g t h e t a n k
g a u g e u n i t , c h e c k t h e
o f w a t e r a n d d i r t . W h e n i n s t a l l i n g a t a n k u n i t , b e s u r e
c o n d i t i o n o f t h e filter o n t h e e n d o f s u c t i o n t u b e . I f
t h e f i l t e r i s p u s h e d o n t h e e n d o f t h e t u b e u n t i l s e a t e d .
t h e f ilil t er er i s p l u g g e d , i n s t a l l a n e w
f i lltt e r .
( 1 ) P o s i t i o n f u e l t a n k g a u g e u n i t i n t a n k , u s i n g a
REMOVING TH E F U E L TAN K (Excep ptt Station Wagon) C A U T I O N : Be s u r e t he ignition s w i t c h i s tur ned ned off before d i s c o n n e c t i n g o cr o n n e c t i n g t h e g a u g e w i r e .
n e w g a s k e t . T i g h t e n s e c u r e l y , u s i n g T o o l C - 3 58 5 8 2 . (If
t a n k i n s u l a t o r w a s t o r n o r d a m a g e d d u r i n g r e m o v a l o f t a n k , b e s u r e a n d i n s t a l l a new i n s u l a t o r at r e a s s e m b l y . ) In I n s t a l l v e n t h o s e s o n t a n k , (i f r e m o v e d . ) ( 2 ) S l i d e f u e l t a n k u n d e r v e h i c l e . R a i s e t a n k f a r
Removal
e n o u g h t o e n g a g e
(1 1)) D r a i n t a n k i n t o a s a f e t y c a n , t h e n d i s c o n n e c t f u e l l i n e a n d w i r e l e a d t o g a u g e u n i t .
p a n e l , a n d l o c a t o r e m b o s s m e n t s o n f l o o r p a n . ( 3 ) P u s h t a n k t o w a r d r e a r t o f u l l y e n g a g e
(2 ) R e m o v e k e y s t o n e c l a m p s f r o m
v e n t h o s e s at
v a p o r s e p a r a t o r , t h e n s l i d e v e n t t u b e s o u t o f f r a m e s i d e r a i l . ( F i g . 1).
f iill lle er
sp ou t wi th
o p e n i n g i n r e a r f iill lle er
s p o u t i n o p e n i n g .
(4 4)) H o l d f u e l t a n k i n t h i s p o s i t i o n , a n d p l a c e h o l d d o w n s t r a p s i n p o s i t i o n ,
feeding
a t t a c h i n g s t u d s
(3 3)) R e m o v e s c r e w t h a t a t t a c h e s f iill lle er t u b e b r a c k e t
t h r o u g h h o l e s i n e n d o f s t r a p s . I n s t a l l n u t s b u t d o n o t tighten.
to rear cro ssm ember.
A
FU EL
TA NK —FU E L
SY ST EM
14-63
n u t s , t h e n s l i d e of f l o w e r p i v o t .
F U E L S U P P L Y TUBE
to
(8)
R e m o v e l e f t r e a r b r a k e d r u m .
(9)
R e m o v e l e f t r e a r s p r i n g h a n g e r a t t a acc h i n g b o l t s
frame. ( 10 1 0 ) L o w e r h o i s t a n d a l l o w r e a r a x l e t o f a l l
awa y
f r o m v e h i c l e f a r e n o u g h so as as not to s t r e t c h
brak e
hose. (1 11 1 ) R e m o v e f u e l t a n k s u p p o r t s t r a p n u t s f r o m eye-
bolts.
LOCATING TANGS
FILTER
( 12 12 ) S l i d e f u e l t a n k f o r w a r d a n d t i l t l e a d i n g d o w n . W o r k f u e l t a n k o u t f r o m u n d e r r e a r
SUC T I ON T UBE
( 1 3 ) L o o s e n t a n k g a u g e u n i t , u s i n g s p a n n e r w r e n c h
FLOAT
T o o l C - 3 5 8 2 . S l i d e u n i t u p a n d o u t o f t a n k .
F i g . 3 — f u e l G au g e (T an k
Unit)
I n s t a l l n e w k e y s t o n e c l a m p s o v e r v e n t h o s e s ,
t h e n s l i d e v e n t t u b e s t h r o u g h f r a m e s i d e r a i l and in s t a l l o n v a p o r s e p a r a t o r f itit titi ng n g s. s. U s i n g k e y s t o n e c l a m p p l i e r s , t i g h t e n h o s e c l a m p s s e c u r e l y . ( F i g . 1).
(6)
G u i d e b u t t o n h e a d of s t u d s i n s l o t s i n f r a m e
a n d d o w n i n t o p o s i t i o n . T i g h t e n h o l d d o w n s t r a p at t a c h i n g n u t s s e c u r e l y . (40 i n - l b s . ) ( 7) 7) I n s t a l l
f i llll er er
t u b e m o u n t i n g s c r e w a n d t i g h t e n
securely.
( 8 ) C o n n e c t l e a d w i r e t o t a n k g a u g e u n i t , r e c o n n e c t f u e l l i n e a n d g r o u n d s t r a p ( F i g . 4).
TANK
•
Installation ( 1) 1) P o s i t i o n f u e l t a n k g a u g e u n i t i n t a n k , u s i n g a n e w g a s k e t . T i g h t e n s e c u r e l y , u s i n g T o o l C - 3 58 58 2 . (2 ) W o r k f u e l
t a n k u p i n t o
p a n e l . M o v e r e a r w a r d
unti l
p o s i t i o n i n q u a r t e r
f iill lle er
t u b e i s c e n t e r e d i n
in
i n
and
opening quarter panel. Plac e straps position i n s t a l l n u t s . T i g h t e n to 40 i n c h - p o u n d s . B o t t o m s t r a p s h o u l d b e t i g h t e n e d
f iirr st st .
( 3) 3) I n s t a l l f u e l l i n e a n d c o n n e c t g r o u n d s t r a p ( F i g . 4 ) , an d f u e l g a u g e w i r e . I n s t a l l n e w c l a m p s o n v e n t t u b e s , t h e n
inst all
t u b e s o n t a n k
f iitt titi n ng gs.
T ig ht en
c l a m p s s e c u r e l y .
( 9) 9) R e f i l l t a n k a n d c h e c k f o r l e a k s .
FUEL
quarter
panel.
NY 1 2 8 0
(5)
edge
(4 ) R a i s e h o i s t f a r e n o u g h t o e n g a g e s p r i n g h a n g e r w i t h f r a m e .
(Station Wag agon on)) (Fig. 2)
(5)
P o s i t i o n l e f t r e a r s p r i n g h a n g e r at f r a m e and
i n s t a l l a t t a c h i n g b o l t s . T i g h t e n to 30 f o o t p o u n d s .
R e m o v al C A U T I O N : Be s u r e t h e I g n i t i o n Switch is t u r n e d O F F
b e f o r e d i s c o n n e c t i n g o r c o n n e c t i n g the gauge wire. ( 1) 1) R e m o v e
f i llll er er c a p a n d s y p h o n f u e l i n t o
safety
can.
(2 ) R a i s e v e h i c l e o n h o i s t a n d r e m o v e f e n d e r s k i r t (i f s o e q u i p p e d ) . R e m o v e l e f t r e a r t i r e an d w h e e l .
(4)
R e m o v e s c r e w s t h a t a t t a c h s t o n e s h i e l d t o w h e e l
h o u s e . S l i d e s h i e l d d o w n a n d a w a y f r o m v e h i c l e .
s t r a p an d g a u g e
wir e. Disc on nec t vent tubes . (6 ) P l a c e s t a n d s u n d e r
f r a m e at r e a r t o s u p p o r t
v e h i c l e as h o i s t i s l o w e r e d .
(7) R e m o v e r e a r CLIP—FUEL GAUGE GROUNDING
sh oc k absor bers low er
p i v o t s a n d s e c u r e
w i t h n u t s . T i g h t e n to 50 f o o t p o u n d s .
( 7 ) I n s t a l l b r a k e d r u m o n a x l e
f l an an g e .
( 8 ) S l i d e s t o n e s h i e l d u p i n t o p o s i t i o n . I n s t a l l at t a c h i n g s c r e w s a n d t i g h t e n s e c u r e l y . ( 9) 9) I n s t a l l w h e e l an d t i r e a n d t i g h t e n w h e e l n u t t o 6 5 f o o t p o u n d s i n s e q u e n c e .
(3)
(5) D i s c o n n e c t f u e l l i n e , g r o u n d
(6 ) S l i d e s h o c k a b s o r b e r s o v e r
( 1 0 ) R a i s e h o i s t an d r e m o v e c a r s t a n d s . ( 11 11 ) I n s t a l l f e n d e r s k i r t (if so e q u i p p e d ) an d l o w e r v e h i c l e t o floor.
( 12 1 2 ) R e f i l l f u e l t a n k a n d c h e c k f o r l e a k s . ( 1 3 ) F o r t e s t i n g
fue l
g a u g e (tank u n i t )
r e f e r t o
E l e c t r i c a l G r o u p 8 " G a u g e s " .
attach ing
THROTTLE
LINKAGE
ADJUSTMENT
TUBE-FUEL LINE WIRING-FUEL GAUGE JA NK TUBE-FUEL GA UGE
U N IITT
TANKT jNIT-
Automatic
Transmission
F o r a d j u s t m e n t of t h r o t t l e l i n k a g e , r e f e r t o T r a n s m i s s i o n S e c t i o n of t h i s M a n u a l .
TUBE-FUEL LINE
M an u al T r an s m i s s i o n (Fig. 1) (C h r y s l e r w i t h 383 or 440 Cu. In.
7/ /// V STUD-FUEL
CUP-FUEL GAUGE GROUNDING GAUGE STUD-FUEL^GAUGE
T U B E - F U E L G A U G E T A N K UN UN I T
UNIT NR11
(1)
Eng.)
A p p l y a t h i n film o f m u l t i - p u r p o s e
g r e a s e o n
b a l l e n d a n d p o c k e t (14) at r e a r e n d o f t h r o t t l e c a b l e .
( 2 ) D i s c o n n e c t c h o k e (8) at c a r b u r e t o r o r b l o c k
F i g . 4 - f u e l T a n k G r o ouu n d
S tr tr a p
c h o k e v a l v e i n f u l l o p e n
position .
O p e n throttle
14-64
A
S PECIF ICA TION S
NU347
« g . I — TThrottle hrottle Linka ge Adjustment {383 and 440 Engines) s l i g h t l y t o r e l e a s e f a s t i d l e c a m , t h e n r e t u r n c a r b u
(4 ) B a c k of f f e r r u l e (5) 1/4 " . T h i s p r o v i d e s 1 / 4 "
r e t o r t o c u r b i d l e . (3 ) L o o s e n c a b l e c l a m p n u t (4) (4),, a d j u s t p o s i t i o n o f c a b l e h o u s i n g f e r r u l e (5 (5)) i n t he c l a m p s o t h a t a l l s l a c k i s r e m o v e d f r o m
c l a m p i n d i r e c t i o n away f r o m c a r b u r e t o r l e v e r .
c a b l e w i t h c a r b u r e t o r at c u r b i d l e .
T o r e m o v e s l a c k f r o m c a b l e , m o v e f e r r u l e (5) (5) i n th e
c a b l e s l a c k at i d l e . T i g h t e n
cable
c l a m p n u t ((4) 4) to
45 inch-pounds. ( 5 ) C o n n e c t c h o k e (8) (8) r o d or r e m o v e
bloc kin g
ture.
S P E C I F I C A T I O N S
H O L L E Y M O D E L 4 1 6 0 4 -B - B A R R E L D O W N D R A FFTT C A R B U R E T O R C A S.
E.C.S.
E n g i n e D i s p l a c e m e n t ( c u . i n. ) T r a n s m i s s i o n T y p e
R-4366A 440 Automatic
R-4360A 440 Automatic
Throttle Bore P ri m ar y . . . . . . . . Secondary
1-9/16" 1-9/16"
1-9/16"
1-1/4"
1-1/4"
1-5/16"
1-5/16"
64 63 62
64 63 62
Model
M a i n V e n t u r i
Primary Secondary M a i n M e t e r i n g J e t
Standard 1 S i z e L e a n 5 , 0 0000 - 1 0 ,0 ,0 0 0 ft.) 2 S i z e L e a n ((5
1-9/16"
f iixx
Adjustments C u r b I d l e S p e e d
650
650
S P E C I F I C A T I O N S
A 1600 5/64" #25 Drill #46 Drill #53 Drill
1600 #72 #25 #46 #53
15/64" 17/64"
15/64" 17/64"
9/16" 13/16"
9/16" 13/16"
.015 M i n . 65
.015 M i n . 65
Well
Well
Coil Spring 2-Notches Rich
Coil Spring 2-Notches Rich
F a s t Idle S p e e d (No. 2 S t e p ) B o w l V e n t V a l v e . — U n l o a d e r A d j u s t m e n t (wide o p e n t h r o t t l e ) Vacu um K ick Adjustment F a s t Idle C a m P o s i t i o n F l o a t S e t t i n g (Dry ) Primary S ec e c o n d a r y . . . . . . . . — F l o a t S e t t i n g (Wet) Primary Secondary
Ac celerator Pum p O v e r r i d e A d j u s t m e n t (wide o p e n t h r o t t l e ) . — P o w e r V al a l v e ( s t a m p e d ) Choke Type Control Setting
SPECIAL
Elevating L e g s Stand Pow er Valv e Rem ov er-Ins talle r M a i n M e t e r in g J e t R e m o v e r - I n s t a l l e r We t F u e l G a u g e Clut ch Head Screw driver
B A L L A N D B A L L V
I N C H B B D C A R B U R E T O R C.A.S.
CA S. Type — E n g i n e D i s p l a c e m e n t (c u . in.) . . . . — Manual T r a n s . Automatic Trans. B o r e — Venturi Main Metering J e t Standard O n e S t e p L e a n . Two Step s Lean S t e p - U p Wire ( St St a n d a rd ) ......... D i a m e t e r (2 S t a g e ) ADJUSTMENTS Ac celerator Pump Setting F l o a t S e t t i n g (at C e n t e r of F l o a t s ) . Vacuu m K ick Adjustment F a s t Idle C a m P o s i t i o n A d j u s t m e n t B o w l V e n t V a l v e (at c u r b i d l e ) — C h o k e U n l o a d e r — Idle S p e e d R P M ( C u r b i d l e ) F a s t Idle S p e e d RPM CHOK E
Setting
Drill Drill Drill Drill
TOOLS
T109-287 C-3886 C - 37 37 4 7 C - 3 7 4 8 C-4051 C L - 1 3
Type Control
14-65
383 BBD-4725S
—
C.A.S.
_
E.C.S.
E.C.S.
Ball an d Ball Dual Downdraft 383 383 383 BBD-4727S **BBD-4726S ***BBD-4894S
,
383
•
BBD-4728S
1-9/16" 1-9 /16"
1-9/16" 1-9 /16"
1-9/ 1-9/16" 16"
1-9/16" 1-9 /16"
1-9 1-9/16" /16"
1-5/16" 1-5/ 16"
1-5/16" 1-5 /16"
1-5/16" 1-5 /16"
1-5/16" 1-5/ 16"
1-5/16" 1-5 /16"
120-329S 120-313S 120-303S 75-1652 .035 x .027" .027"
120-306S 120-304S 120-329S 75-1730 .042" x .039 .039"
120-306S 120-304S 120-329S 75-1730 .042" x .039 .039"
120-329S 120-313S 120-303S 75-1652 .035" x .027" .027"
120-306S 120-304S 120-329S 75-1730 .042" x .039 .039"
• A f t e r A p p r o x . 500 M i l e s (If N e c e s s a r y ) * * W i f h o u t A i r C o n d i t i o n i n g * * * W i t h A i r C o n d i t i o n i n g
14-66
SPECIFICATIONS
H O L L E Y 2 2 1 0 S E R IIEE S 2 -B -B A R R E L L D O W N D R A F T
CARBURETOR CA S.
Dual Downdraft 383
Type E n g i n e D i s p l a c e m e n t ( c u . i n ..)) M a nu nu a l T r a n s m i s s i o n Automatic Transmission Bore Venturi Main M e t e r i n g J e t Standard One Step Lean .. Two Steps L ean ADJUSTMENTS Accelerator Pump Setting Float Setting Vacuum K ick Adjustment dle Cam Position Ad justm ent .. F a s t IId B o w l V e n t V a l v e ( a t C u r b iid dle) . . . . . . C h o k e e U n l o a d e r Idl e Mixture S c r e w s ( T u r n s O p e n ) . . Idle Speed RPM (Curb Idle) F a s t I d l e S p e e d R P M CHOKE Type Control
R-4371A 1-9/16" 1-9 /16"
1-13/32" #63 #62 #61
#65 #64 #63
9/16" (1/4" Travel) # 7 d r i l l (.200) #28 drill #35 drill 5/64" 11/64" 1-1/2 650 1700* Well Thermostatic C o i l S p r i n g 2 Notches Rich
Setting * After Approx. 500 Miles (If Necessary)
CARTER AVS SERIES CARBURETORS Type
Model
T r a n s m i s s i o n T y p e E n g i n e D i s p l a c e m e n t ( C u . I n .) .) T H R O T T L E B O R E
Primary S e c o n d a r y MAIN V E N T U R I Primary MAIN J E T Prim ary S e c o n d a r y y L O W S P E E D J E T Pri m ary Stage) S T E P - U P R O D ( 2 --S St an d ar d ADJUSTMENTS to p o f p l u n g e r t o A c c e l e r a t o r P u m p ( to a i r horn ) F a s t I d l e C a m P o s i t i o n ( d r i l l s i z e ) . . . Choke Unload er V a c u u m K i c k ( d r i llll s i z e ) B V een t Sp V aee lve t t i n.)g F ao swt l Idl d S (r.p.m (r.ep.m Idl e Sp ee d (r.p. (r.p.m m .) S e c o n d a r y y T h r o t t l e L e v e r A d j S e c o n d a r y y T h r o t t l e L o c k o u t A d j Float Setting
C .A . A . SS..
CAS.
Carter 4 B arrel Downdraft **AV S-4736S ***A VS-4 732S
E .C . C .S .S .
C AS.
AVS-4734S
AVS-4737S
Autom atic 38 83 3
Automatic 3 83 83
Autom atic 3 83 83 ^
Manual 4 40 40
1-7/16" 1-11/16" 1-11/16"
1-7/16" 1-11/16" 1-11/16"
1-7/16 1-7/16"" 1-11/16" 1-11/16"
1-11/16" 1-11/1 6" 1-11/16" 1-11/16"
1-3/16" 1-3 /16"
1-3 1-3/16" /16"
1-3 1-3/16" /16"
1-3 1-3/16" /16"
089" 098 "
.08 89 9" .098 .098""
.08 89 9" .09 .098 8"
.08 89 9" .095"
#68 -.031" -.031"
#68 -. -.031" 031"
16-546 16-546
1616-546 546
#68 -. -.031" 031" _ 1616-546 546
#65.035" „ 1616-617 617
7/16" #50 1/4 4"" #44
7 1 16 "
7 1 16 "
71 16"
31700* /64" 700 1 9 /6 /6 4 " 020" 5/16"
31700* /64" 700 1 9 //6 64" .0 2 0" 0" 5/16"
3/4" 1700* 700 1 9 //6 64" . 0 2 00"" 5/16"
3/64" 2000* 900 23/64" . 0 2 00"" 7/32"
#50 1/4 4"" #44
,
.
#50 1/4 4"" #44
m
#50 1 /4 /4 " #20
Float Drop Air Valve Spring Tension— (from Vertic al-Turns)
1/2"
1/2"
1/2"
1/2"
2
2
2
2
SPECIFICATIONS CHOKE Type Control
Setting * A f t e r A p p r o x . 5 00 00 M i l e s ( I f N e c e s s a r y )
Well C o i l S p r i n g
Well C o i l S p r i n g
2 N o t c h e s R i c h ^ Without A ir Conditioning
2 N o t c h e s R i c h ***With A i r C o n d i t i o n i n g
1 4 -67
CARTER AVS SERIES CARBURETOR CAS.
CAS.
Type
**AVS-4738S
Model
Transmission Type E n g i n e D i s p l a c e m e n t ( C u . I n ..)) THROTTLE BORE Primary Secondary MAIN V E N T U R I P rrii m a rryy . . . i . MAIN J E T Primary Secondary L OW S P E E D J E T P ri r i m ar ar y . — . — S T E P - U P ROD (2-Stage) Standard ADJUSTMENTS A c c e l e r a t o r r P u m p ( t o p o f p l u n g e r ai r h o r n ) (d r i l l s i z e ) F a s t I d l e C a m P o s i t i o n (d Choke Unloader V a c u u m K i c k ((d d r i llll s i z e ) B o w l l V e n t V a l v e S e t t i n g F a s t Idl e Speed (r.p.m .) Idl e Sp eed (r. (r.p.m p.m .) S e c o n d a r y y T h r o t t l e L e v e r A d j .
to .. . —
—
S e c o n d a r y T h r o t t le le L o c k o u t A d j Float Setting Float Drop Ai r V a llvv e S p r i n g T e n s i o n — ( f r o m Vertical-Turns) CHOKE Type Control — Setting * After Approx. 500 Miles (If Necessary)
E . C . S. S.
C a r t e r r 4 B a r r e l Do wn d r a f t ***AVS-4741S AVS-4739S