Woodward Psg Gov2

Published on August 2020 | Categories: Documents | Downloads: 6 | Comments: 0 | Views: 100
of 84
Download PDF   Embed   Report

Comments

Content

 

 

Installation Installatio n and Operatio Operatio n Manual Manual

PSG Gov PSG Governo ernorr wit h Ca with Cast st Iron Case Case

Manu Ma nual al 370 37017 17 (Revi (Revisi sion on A)

 

 

WARNING—DANGER OF DEATH OR PERSONAL INJURY INJ URY  WARNING—FOLLOW INSTRUCTIONS Re Read ad this entire manua manuall and all other publications pertaining to the work to be performed before installing, operating, or servicing this equipment. P Practice ractice all plant and safety instructio ns and precautions. F Failure ailure to follow inst ructions c an cause pe personal rsonal injury and/or property damage.

WARNING—OUT-OF-DATE PUBLICATION This publication may have be been en revised or updated since this copy w as produced. To verify that you have the latest revision, be sure to check the Woodward website: www.woodward.com/pubs/current.pdf The revision revision l eve evell is shown at the bottom of the front co ver afte afterr the pub lication number. The latest late st version of most publications i s availa available ble at: www.woodward.com/publications If your pub lication is not there, plea please se contact your customer service representa representative tive to get the latest copy.

WARNING—OVERSPEED D PROTECTION WARNING—OVERSPEE The engine, engine, turbine, or other type of prime mover should be equipped with an overspeed overspeed shutdow n device to protect against runaway or damage to the prime move moverr with possible personal injury, loss of life, or pr operty damage damage.. The overspeed overspeed shutdown device must be totally independent of the pri me mover control system. An overtemperature overtemperature or overpressure shut down device may also be needed needed for safety, as appropri ate.

WARNING—PROPER USE  An y u nau th or ized iz ed m od if ic ati on s t o o r us e of th is eq equi ui pm ent ou ts id e its i ts sp ecif ec if ied mechanical, electrical, or other operating limits may cause personal injury and/or property damage, including damage to the equipment. Any such unauthorized modifications: (i) constitute "mis use" and/or "negligence" within the meaning of the product warranty thereby excluding warranty coverage for any resulting damage, and (ii) invalidate product certifications or listings.

CAUTION—POSSIBL BLE E DAMAGE DAMA GE TO EQUIPMENT OR PROPERTY PROPERTY CAUTION—POSSI CAUTION—BATTERY CHARGING To prevent damage to a contr ol s ystem that uses an alternator or battery-charging battery-charging device, make sure the charging d evice is turned off before disco nnecting the battery from the sys tem.

CAUTION—ELECTROSTATIC DISCHARGE Electronic c ontrols contain static-sensitive pa Electronic parts. rts. Observe the following precautions to prevent damage to these parts. Discharge body static before handling the control (with power to the control turned off, contact a grounded surface and maintain contact while handling the con trol).  Avo id all pl ast ic , vin yl , and Styr of oam (exc ept ant is tat ic ver versi si on s) ar ou nd pr in ted ci rc ui t boards. •





Do not touch the components or conductor s on a printed circuit board with your h ands or wit h conductive devices.

IMPORTANT DEFINITIONS •





 A WARNING WARNING indicates  indicates a potentially hazardous hazardous situation w hich, if not avoided, could r esult in death or serious injury .  A CAUTION CAUTION indicates  indicates a potentially hazardous hazardous situation w hich, if not avoided, could r esult in damage dama ge to equipment or pr operty.  A NOTE provides NOTE provides other helpful information that does not fall under the warning or caution categories.

Woodward Governor Company reserves the right t o update any portion of th is publ ication at any time. IInformation nformation provided by Woodw ard Governor Company is believed to be correct and reliable. However, no responsi bilit y is assumed by Woodward Governor Company unless otherwi se expressly undertaken.

© Woodward 1992  All Rig hts Reserved

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Contents CHAPTER 1. GENERAL INFORMATION.............. ............................ ............................ ............................ ................. ... 1 

Introduction.............................................................................................................1   Special Features.....................................................................................................2  References .................. ........................... ................... ................... .................. ................... ................... .................. ................... ................... ................2 .......2 

CHAPTER 2. INSTALLATION.............. ............................ ........................... ........................... ............................ ................... ..... 3  Introduction.............................................................................................................3 Receiving................................................................................................................3    Storage .................. ............................ ................... .................. ................... ................... .................. ................... ................... .................. ................... .............3 ...3  External Return Spring .................. ........................... ................... ................... ................... ................... ................... ................... ................3 .......3  Oil Supply ................... ............................ .................. .................. ................... ................... .................. .................. ................... ................... ..................3 .........3  Governor Installation ......... ................... ................... ................... ................... .................. ................... ................... ................... ...................5 .........5  Speed Adjustment ................... ............................ .................. ................... ................... .................. ................... ................... .................. ..............8 .....8  Speed Droop ................... ............................. ................... .................. ................... ................... .................. ................... ................... .................. ............9 ...9  External Shutdown Solenoid ......... ................... ................... .................. ................... ................... .................. ................... ...............10 .....10  Initial Operation and Adjustment .................. ........................... ................... ................... ................... ................... ..................11 .........11 

CHAPTER 3. PRINCIPLES OF OPERATION ............. .......................... ........................... ......................... ........... 15 

   

Introduction...........................................................................................................15 Operation..............................................................................................................15

CHAPTER 4. TROUBLESHOOTING AND M AINTENANCE ............ .......................... ..................... ....... 20  Introduction...........................................................................................................20   General Troubleshooting......... Troubleshooting ................... ................... .................. ................... ................... .................. ................... ................... ...........20 ..20  Speed Droop Adjustment .................. ........................... ................... ................... ................... ................... ................... ................... ..........25 .25  Setting External Droop .................. ........................... ................... ................... ................... ................... ................... ................... ..............26 .....26  Negative Droop.....................................................................................................26  Needle Valve Adjustment ................... ............................ .................. ................... ................... ................... ................... ...................26 ..........26  Linearity and Output Shaft Rotation .................. ........................... ................... ................... ................... ................... .............27 ....27  Jiggle ......... ................... ................... ................... ................... .................. ................... ................... .................. ................... ................... .................. .............27 ....27  Removing a PSG Governor from the Engine ................... ............................ ................... ................... .................27 ........27  Tools for Disassembly Disasse mbly and Assembly .......... ................... ................... ................... ................... ................... ..................28 .........28  Governor Disassembly .................. ........................... ................... ................... ................... ................... ................... ................... ..............29 .....29  Parts Check and Cleaning............. Cleaning...................... ................... ................... .................. ................... ................... .................. ...............33 ......33  Parts Repair and Replacement ................... ............................ ................... ................... .................. ................... ................... ..........34 .34   Assembly ................... ............................ ................... ................... .................. ................... ................... .................. ................... ................... ................35 .......35  Testing..................................................................................................................44   Test Equipment .................. ........................... ................... ................... ................... ................... ................... ................... ................... ................44 ......44

 

CHAPTER 5. REPLACEMENT P ARTS .............. ............................ ............................ ............................ ................. ... 45  CHAPTER 6. AUXILIARY EQUIPMENT ............. ........................... ............................ ............................ ................. ... 48 

Introduction...........................................................................................................48   Spring-driven, Oil-damped Ballhead ................... ............................ .................. ................... ................... .................. ............48 ...48  Torsion Spring .................. ........................... ................... ................... .................. ................... ................... .................. ................... ...................49 .........49  Pneumatic Speed Setting Setting......... ................... ................... .................. ................... ................... .................. ................... ................... ..........50 .50  Speed Adjusting Motors ................... ............................. ................... ................... ................... ................... ................... .................. ...........56 ..56  Externally Adjusted Speed Droop .................. ........................... ................... ................... ................... ................... ................57 .......57  Internal Return Springs ......... ................... ................... .................. ................... ................... ................... ................... ................... .............60 ...60  Temperature Compensated Needle Valve Valve......... ................... ................... .................. ................... ................... ............60 ...60 

Woodward

i

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Contents CHAPTER 7. SERVICE OPTIONS ............. ........................... ............................ ........................... .........................72 ............72 

Product Service Options......................... Options................................... ................... .................. ................... ................... .................. ...............72 ......72  Returning Equipment for Repair......... Repair ................... ................... ................... ................... ................... ................... ..................7 .........73 3  Replacement Parts .................. ........................... ................... ................... .................. ................... ................... .................. ................... ............74 ..74  How to Contact Woodward...................................................................................74  Engineering Services..................... Services.............................. .................. ................... ................... ................... ................... ................... ...............75 .....75  Technical Assistance......... Assistance .................. .................. ................... ................... .................. ................... ................... .................. ..................76 .........76 

Illustr ations and Ta Tables bles Figure 1-1. Basic PSG Governor.......... Governor................... ................... ................... ................... ................... ................... ...................1 .........1  Figure 2-1. Separate Sump Installation......................... Installation................................... ................... ................... ................... ............4 ...4  Figure 2-2. Oil S System ystem for Horizontal Installation ......... ................... ................... ................... ................... .............6 ....6  Figure 2-3. Engine Oil System for Quick Starts ........ .................. ................... .................. ................... .................6 .......6  Figure Terminal Shaft Travel................... ................... ........................... ................... ................... .................... ...........7 .7  Figure 2-4. 2-5. Recommended Non-linear Linkage.......... Linkage ................... .................. ................... ................... ................... .............8 ....8 Figure 2-6. 2 -6. Governor Speed vs Pump Flow ......... .................. .................. ................... ................... ................... ...........10 .10  Figure 2-7. PSG Outline Drawing (Do not use for construction) ................... ..........................12 .......12  Figure 2-8. PSG Outline Drawing (Do not use for construction) ................... ..........................13 .......13  Figure 2-9. PSG Outline Drawing................. Drawing........................... ................... .................. ................... ................... .................. .........14 14  Figure 3-1. Schematic Diagram of PSG with Adjustable Droop Droop......... ................... ..................16 ........16  Figure 3-2. Schematic of PSG with External Return Spring......... Spring .................. ................... ...............17 .....17  Figure 4-1. Speed Droop Adjustment................ Adjustment......................... ................... ................... ................... ................... .............25 ....25  Figure 4-2. Assembly Tools.......................... Tools................................... ................... ................... .................. ................... ................... .........28 28  Figure 4-3. Align Cover with Drill Blanks ................... ............................. ................... ................... ................... ..............29 .....29  Figure 4-4. Removal of Terminal Levers.......... Levers ................... ................... ................... ................... ................... ..............31 .....31  Figure 4-5. Removal of Speeder Spring................ Spring......................... ................... .................... ................... ..................31 .........31  Figure 4-6. Pilot Valve Disassembly..................... Disassembly............................... ................... .................. ................... ................... ..........31 .31  Figure 4-7. Removal of Ballhead.......... Ballhead ................... ................... ................... ................... ................... .................. .................32 ........32  Figure 4-8. Base Separated from the Case ................... ............................ .................. ................... ................... ..........32 .32  Figure 4-9. Pilot Valve Assembly ................... ............................ .................. ................... ................... .................. .................32 ........32  Figure 4-10. Plugs Installed for Counterclockwise Rotation .......... ................... ................... .............36 ...36  Figure 4-11. Pilot Valve Bushing Assembly Ass embly .................. ........................... ................... ................... ................... ...........36 .36  Figure 4-12. Assembly of Compensating Bushing .......... .................... ................... ................... ..................36 ........36  Figure 4-13. Seating the Retaining Ring .......... ................... .................. .................. ................... ................... ...............37 ......37  Figure 4-14. Base to Case Assembly........................... Assembly.................................... ................... ................... ................... ............37 ..37  Figure 4-15. Assembly of Buffer System......................... System.................................. ................... ................... .................. .........37 37  Figure 4-16. Installation of Power Piston P iston and Piston Stop Screw .......... .................... ..............38 ....38  Figure 4-17. Installation of Ballhead .................. ........................... ................... ................... .................. .................. ..............38 .....38  Figure 4-18. Thrust Bearing and Speeder Spring Parts Parts.......... .................... ................... ................... ..........39 39  Figure 4-19. Centering the Pilot Valve Plunger .................. ........................... ................... ................... ...............39 ......39  Figure 4-20. Using Tool to Set Zero Droop .................. ............................ ................... ................... .................... ...........42 .42  Figure 4-21. Assemble External Droop .................. ............................ ................... ................... ................... .................42 ........42  Figure 4-22. Speed and Droop Adjusting Shafts and Terminal Lever  Assembled ................... ............................ .................. ................... ................... .................. ................... ................... ............42 ...42  Figure 4-23. Bending the Wire Clip ......... ................... ................... ................... ................... ................... ................... .............43 ....43  Figure 4-24. Install Seals on All Shafts ................... ............................ ................... ................... .................. .................43 ........43  ii

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Illu llustr str atio tions ns and Ta Tables bles Figure 4-25. Relief Valve and Cover Installation.......................... Installation.................................... ................... ..............43 .....43  Figure 5-1. Exploded View of Basic PSG Governor........................ Governor.................................. .................... ...........46 .46  Figure 5-2. Basic PSG with Internal Droop Droop and External Return Spring .......... .............47 ...47  Figure 6-1. Exploded View of Oil-damped Ballhead ................... ............................ ................... ................49 ......49  Figure 6-2. Schematic of Pneumatic Speed Setting and PSG Governor ............51 ............51  Figure 6-3. Exploded View of PSG Sealed Pneumatic Speed Setting Setting ................53 ................53  Figure 6-4. Unsealed Pneumatic Speed Setting ................... ............................ ................... ................... ............55 ...55 Figure 6-5. PM Motor Wiring Diagram ................... ............................. ................... ................... ................... .................56 ........56  Figure 6-6. Wiring Diagram for Bodine Motor ................... ............................. ................... ................... ................56 ......56  Figure 6-7. Schematic Diagram of PSG ......... .................. .................. ................... ................... .................. .................58 ........58  Figure 6-8. Adjustable Speed Droop Parts ................... ............................ ................... ................... .................. ...........59 ..59  Figure 6-9. PSG....................................................................................................62  Figure 6-10. PSG with Vertical Return Spring......... Spring .................. ................... ................... .................. .................64 ........64  Figure 6-11. PSG with Vertical Return Spring and Electric Motor ..................... .......................66 ..66  Figure 6-12. PSG with Fuel Rod ........ .................. ................... ................... ................... ................... ................... ..................67 .........67  Figure 6-13. Vertical Return Spring Cover and Associated Parts Parts......... ................... ...............69 .....69  Figure 6-14. Pittman PM Speed Adjusting Adj usting Motor ................... ............................. ................... ................... ...........71 .71  Table 2-1. Oil Chart ................... ............................ ................... ................... .................. ................... ................... ................... ................... ...........4 ..4 

Woodward

iii

 

PSG PS G Governor wit h Cast Iron Case

iv

Manual 37017 37017

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Chapt er 1. Chapter Genera Ge nerall Inform Informa atio tion n Introduction The basic PSG (Pressure Compensated Simple Governor) is a hydraulic speed governor with buffer type compensation. It is normally isochronous, that is, if the engine is not overloaded it maintains the same speed regardless of load, except momentarily at the time load change occurs.

Figure 1-1. Basic PSG Governor

The governor uses engine lubricating oil or an oil supply from a separate sump furnished by the engine manufacturer. If the latter is used, lift should not exceed 300 mm (12 inches) and a foot valve should be furnished.

NOTE The torque, work capacity, and maximum wo rk values of th e PSG PSG governor are based on 172 kPa (25 psi) supply oil pressure to the governor. These values can vary vary depending on t he supply oil pressure. The standard PSG cover provides for an interior vertical return-spring. The cover includes a bracket for the Pittman PM (Permanent Magnet) speed-setting motor. PSG governors without a motor have a low-speed stop screw installed in the cover. See Figure 1-1 for external e xternal features of the PSG.

Woodward

1

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Special Features The normal PSG has a cast iron case and base and an aluminum cover. For many years, PSGs were built with aluminum cases. Aluminum case PSGs are still available for special purposes. Aluminum case PSGs are described in manual 37013. PSGs are built in many special configurations to meet the unique needs of various engine manufacturers. Most of these special features are described in Chapter shaft 6 of this publication. The PSG hydraulic thea terminal in only one direction. If anuses internal returnpressure spring is to notdrive used, spring must be installed before the engine is started.

References 04018 25071 25075 50517

2

Speed Adjusting Motor Cover Assembly Manual  Manual  Oils for Hydraulic Controls  Controls  Commercial Preservation Packaging for Storage of MechanicalHydraulic Controls  Controls  Recommended Engine Oil Supply System for Small Governors and  Actuators    Actuators

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Chapt er 2. Chapter Installation Introduction This chapter describes receiving, storage, and installation requirements for the PSG governor. Use care while handling and installing the PSG governor. Be particularly careful to avoid striking the drive shaft, terminal shaft, or a speed setting device. Abuse can damage seals, internal parts, and factory adjustments. Do not set the governor on its drive shaft.

Receiving  After factory testing and calibration, the PSG governor is drained of oil, which leaves a light film of oil on internal parts to prevent rust. The governor is then painted and external parts are coated with a spray lubricant/rust inhibitor. No internal cleaning or flushing is necessary before installation and operation. The little oil left in the governor is clean, multiviscosity engine oil which will not contaminate an engine oil system.

Storage The PSG governor may be stored for short periods of time (less than a year) as received from the factory. For long-term storage (more than a year), storage in an environment with large temperature changes, humid or corrosive atmosphere, or if the governor is installed on the engine for storage, fill the governor with oil and follow preservation packaging instructions in Woodward manual 25075, Commercial Preservation Packaging for Storage of Mechanical-Hydraulic Controls.. Controls

External Return Return Sprin g The PSG uses internal oil pressure to move the output in the more-fuel direction only. A spring is used to move the output in the fuel-off direction. If an internal return spring is not supplied, an external spring must be installed. The return spring must provide a torque of 2.8 to 5.6 N m (25 to 50 lb-in) on the terminal shaft in the fuel off direction for a governor with 1207 or 1896 kPa (175 or 275 psi) operating pressure respectively. 

Oil Supp Supply ly  Almost all PSG governors use engine oil in the governor. Some governors use oil from a separate sump.

Woodward

3

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Supply Pressure Pressure  A minimum of 172 kPa (25 psi) and a maximum of 517 kPa (75 psi) oil must be supplied from the engine lubricating system. If a separate sump is used the supply must have less than 300 mm (12 inches) of suction lift from the sump. Torque and work capacity will vary according to the amount of supply pressure or suction lift.

NOTE Consult Woodw ard if su pply p ressures must excee exceed d 517 kP kPa a (7 (75 5 psi).

Figure 2-1. Separate Sump Installation

Table 2-1. Oil Chart 4

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Peak demand from the governor will be 7.6 L/min (2 US gal/min) during transients. The Governor will flow 1.3 L/min (0.35 US gal/min) during steady state. Governor oil is both a lubricating oil and a hydraulic oil. It must have a viscosity index that allows it to perform over the operating temperature range and it must have the proper blending of additives that cause it to remain stable and predictable over this range. Use the information given in Table 2-1 as a guide in the selection of a suitable lubricating-hydraulic oil. For applications where the governor shares the oil supply with the engine, use the oil recommended by the engine manufacturer for engine lubricating oil. Should this oil not be included in the table, contact Woodward.

Drive Shaft Shaft Rotation Rotation Rotation of the governor drive shaft must be the same as that of the engine drive, when looking down on the mounting pad. Correct direction of rotation for the PSG governor is shown by a raised arrow at the bottom of the governor case on the side opposite the oil-supply inlet, when looking at the arrow from the top of the governor. Plugs are inserted in the case and base to determine clockwise or counterclockwise direction. Check valves can be used in the governor case to allow either direction of rotation. See Chapter 4 for additional information about pump rotation direction.

Governor Installation Governor to Drive Pad Pad Place a gasket between the base of the governor and the engine mounting pad. The gasket must not block any holes in the governor base. Install the governor on the engine, taking particular care to mount it squarely on the engine. Be sure that the drive connection is properly aligned. Do not force the governor onto the drive connection. It must drop into place of its own weight. Improperly aligned governors will not give stable control. Many governor mounting pads will have studs installed to fasten down the governor. Some installations will require 5/16-inch screws to hold the governor in place. Follow the engine manufacturer's instructions, if available.

Oil Connections Install a 10 mm (3/8 inch) diameter oil line from the governor to either the engine lubricating oil pump pressure line, or a separate sump, unless the engine mounting pad is drilled for an oil supply. Use a 40 µm (nominal) filter with a minimum capacity of 7.6 L/min (2 US gal/min). The best installation will include supply features that prevent drain back or siphon back from the pump level of the governor. This will always keep the pump primed with oil in preparation for the next start. See instantaneous Figures 2-2 and 2-3 for illustration an at installation to provide nearly governor response, of even cranking designed speed. See also the “Quick Start” instructions on the next page. Woodward

5

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 2-2. Oil System for Horizontal Installation

Figure 2-3. Engine Oil System for Quick Starts (Vertical Installation)

Vertic Ve rtic al Governor Installation  Allow free drainage of oil from the governor pilot valve by providing adequate drain holes from the drive coupling (6 mm [1/4 inch] diameter or equivalent in multiple holes). Be sure the engine mounting pad gasket does not block off the three drain holes in the governor base. See Figures 2-7, 2-8, and 2-9.

Horizontal Governor Governor Installation If the governor is mounted horizontally, the needle valve adjustment must be on the side and at the lowest level. Horizontal mounting also requires that a drain line be installed fromineither a 6 mm inch) tap 7/16 inch and straight thread port the cover. The(1/4 drain linepipe must beorasexisting large as possible unimpeded to the sump. 6

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Quick Start Use a supply system similar to Figure 2-3 for applications requiring quick starts. Note that the end of the overboard drain line must be kept above the engine sump oil level to allow the system to act as a vent before the engine oil pump is adding to the oil supply. Oil level in the oil tank must always be as high as, or higher than, the pump level to prevent the pump from losing its prime and delaying the start of governor operation until the pump regains a flow of oil.

Linkage from Governor to Engine Connect the fuel-control linkage for 2/3 2 /3 travel from no-load to maximum fuel. Divide the unused portion of the travel between minimum and maximum. Make sure that the linkage will shut off the fuel at minimum position. The linkage must be free from friction and looseness. Most PSG governors have internal return springs. The return spring must be able to move the fuel valve or rack to a closed position. The PSG governor does not supply hydraulic pressure control in the minimum fuel direction.

Linear Lin kage Use linear linkage for most diesel applications. Adjust the linkage to provide control of engine fuel fromengine Minimum Prime Mover Stop tofuel Maximum Prime Mover Stop within the limits l imits of the governor output-shaft travel. We recommend using two-thirds or more of the 36 degrees of output-shaft travel between prime mover no-load and full-load positions (see Figure 2-4).  Attach the fuel-rack linkage to the governor output shaft. Be sure there is no lost motion or binding in the linkage.

NOTE Be sure to allow sufficient o vertrave vertravell at each end of terminal-shaft travel so the governor can shut dow n the engine and and also give maximum fuel when required.

Figure 2-4. Recommended Terminal Shaft Travel

Woodward

7

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 2-5. Non-linear Linkage

Non-linear Linkage  Applications involving a butterfly valve, such as a gas engine, require a non-linear linkage. Figure 2-5 illustrates the relationship between governor output shaft and butterfly valve obtained with simple linkage of maximum non-linearity. When installing this linkage, make sure the two following conditions are attained when the linkage is in the no-load position: 1.

The lever which is att attached ached tto o the governor output and the connecting link are in line with the governor output shaft and the point of attachment of the connecting link to the butterfly lever.

2.

The butterfly lever is at 90

with the connecting link.

Refer to the engine manufacturer's instructions for the correct linkage selection and installation.

Speed Adjustment There are several types of speed adjustments available for the PSG.

Lever Some governors have a lever attached to the external end of the speed-adjusting shaft. This lever is used in conjunction with the high- and low-speed stop screws. Using a linkage arrangement with the lever provides a remote speed adjustment for the governor. The screw in the cover is used to set the minimum-speed stop while the screw in the case controls the maximum-speed stop of the governor. The speed-setting shaft does not usually extend from governors designed for pneumatic or motor speed setting.

8

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Pneumatic Pne umatic Head Head or Motor The governor can be equipped with either a pneumatic speed-adjustment head or an electric motor for remote speed adjustment (see Chapter 6 for details about these two types of speed setting). Both of these speed setting systems use a high-speed stop screw.

Constant Speed Some PSGs are equipped with a speed-setting screw in the cover. This is the same screw used as the minimum-speed stop with speed-setting devices.

Speed Spe ed Droop PSG droop is internally or externally adjustable between zero and seven percent. Speed droop, a reduction in speed setting as fuel increases, is expressed as a percentage of the difference between the lower full-load speed and the high speed at no load. Speed droop permits load division between two or more engines driving generators in parallel or connected to a single shaft. If the engine is operated alone or on a dc system with proper generator compounding, the governor may be set for zero droop (isochronous operation).

NOTE

Negative droop (governor speed setting increases as load increases) must Negative not be set int o the PSG governor. The governor will not pr ovide acceptable contro l with negative droop.

NOTE If the governor ou tput s haft does not use the full 2/3 of ava available ilable travel travel from NO LOAD LOAD to FULL LOAD, droop will be reduced prop ortionately. For ac generating units tied in with other units, set the droop sufficiently high to prevent interchange of load between units. If one unit in the plant or system has enough capacity, set its governor on zero droop and it will regulate the frequency of the entire system. This unit then takes all load changes within the limits of its capacity and control the frequency if its capacity is not exceeded.  All units may be run in droop, but the no load to full load speed change (droop setting) must be equal for all paralleled units. Speed will change as load is increased or decreased. Adjust speed setting to share load: increasing or decreasing speed setting on a particular unit will increase or decrease the load on that unit. Internally adjusted droop is normally set at the factory on a test stand according to the engine manufacturer's specifications. Do not move the droop position unless you are familiar with PSG governor setup procedures. See Application Note 01302, Speed Droop & Power Generation, Generation, for more information on setting droop for power generation.

Woodward

9

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

External Shutdown Solenoid Use an external solenoid for shutdown through the governor.

WARNING—OVERSPEED PROTECTION  The engine should be equipped with an overspeed shutdow n that is completely independent of the PSG PSG governor. Overspeed Overspeed can and w ill cause damage to the engine or the engine-driven device with poss ible personal injury of l oss of l ife. IItt is likely that the governor, governor d rive, or linkage could b e the cause of the overspeed and a shutdown connected to th e governor wo uld not help con trol the runaway engine speed. speed. The shutdown solenoid shown in Figure 2-3 allows draining the control oil from beneath the power cylinder in the governor. This will allow the return spring to move the governor output to minimum fuel. Figure 2-3 shows the connection options for a solenoid shutdown. Connect the solenoid with tubing runs as short as possible. Mount the solenoid below the governor, oriented so it does not fill with air. Air trapped by the tubing causes governor instability. Figure 2-1 shows a separate sump arrangement and Figure 2-3 shows a typical installation using engine oil. The solenoid and all connected tubing must pass enough flow to ensure that the governor moves to minimum position and remains there. The solenoid dumps oil directly from the power cylinder, and must mu st handle the full pump output. Different flow capabilities are required, depending on rated governor speed. Figure 2-6 shows PSG pump output versus governor speed and is provided to help size the shutdown solenoid and shutdown connections.

Figure 2-6. Governor Speed vs Pump Flow

 All pump output must be discharged with a maximum pressure drop of 138 kPa (20 psi) for 517 kPa (75 psi) governors and 345 kPa (50 psi) for 1207 kPa (175 psi) governors.

10

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Initial Operation and Adjustment Governor adjustments for speed, droop, and compensation needle valve are set at the factory. Minor adjustments are required after installation due to engine variances. PSG screw set speed is set at the factory to specified full-load rated speed. Internally adjusted droop setting is factory set as specified for the particular application. Droop should always be set as near isochronous as possible to provide the fastest possible governor response to speed/load changes. The needle valve is preset to 1/2 turn open. This normally requires adjustment to suit the particular installation. Make certain the speed is set to minimum (idle). Start the engine under manual control according to the engine manufacturer's recommendations, and allow it to warm up. Transfer the engine to governor control, but be prepared to resume manual control until satisfied that the governing system is fully operative.  Adjust the governor for no-load rated speed. Open Open the compensation needle valve (1/2 to 2 turns) until the engine begins to hunt or surge. Allow the engine to hunt for about a minute to purge trapped air from the internal passages in the governor. Gradually close the needle valve until hunting just stops. Closing the needle valve further than necessary results in a slow return to speed following a change in load. Do not attempt to operate the governor unless the needle valve is at least 1/8 turn open. The governor cannot provide optimum response with the needle valve too far closed. Test the governing action by manually disturbing engine speed. The engine should return promptly to original steady-state speed with only a small overshoot.

WARNING—START-UP  Be prepared prepared to m ake a an n emergency shutdo wn w hen starting th e engine, turbine, or other type of pri me mover, to prot ect aga against inst ru naway or overspeed with poss ible personal injury, loss of life, or property damage. damage.

Woodward

11

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 2-7. PSG Outline Drawing (Do not use for construction) 12

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 2-8. PSG Outline Drawing (Do not use for construction) Woodward

13

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 2-9. PSG Outline Drawing (PSG with Bodine Type Motor, Horizontal Return Spring, External Droop) (Do not use for construction) 14

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Chapt er 3. Chapter Prin rincip ciples les of O Opera peratio tion n Introduction This chapter describes the operation of the PSG governor, including a description of the hydraulic system and the way it operates. Figure 3-1 and 3-2 show the relationship of the various parts.

Operation Mechanical Me chanical Hydraulic Hydraulic System Figure 3-1 shows the oil supply coming from the engine lubricating system. It bypasses the relief valve into the governor oil pump where its pressure is increased to either 517, 1207, or 1896 kPa (75, 175, or 275 psi) above inlet pressure. Four check valves permit rotation of the governor in either direction. Some models have two of the passages plugged for rotation in one direction only. Relief-valve discharge is back to supply, so unused oil is recirculated within the governor. Pressured oil is supplied though oil passages to the pilot-valve system. The pilotvalve system is a three-way spool valve. It applies pressured oil to the power cylinder when an under-speed signal is received or releases trapped oil from the power cylinder when a over speed signal is received. Oil flow into the power cylinder forces the power piston upward against the force of the return spring. Pressured oil displaces the buffer piston and forces oil into the upper annulus. Because all moving parts of the PSG are immersed in oil during normal operation the governor has extremely long wear without changes of speed setting or control ability.

Ballhead System Flyweights are attached to the pilot valve's rotating bushing by pivot pins. The pilot-valve bushing is driven by an external drive from the engine. A thrust bearing, located under the speeder spring, rides on the toes of the flyweights. This allows the flyweights and pilot-valve bushing to rotate without extreme friction. The non-rotating pilot-valve plunger inside the rotating bushing is able to respond to minor changes in positioning pressure because of the rotational/non-rotational relationship between the two parts. This reduction of “sticktion” between the parts allows more precise control than would be otherwise possible.

Woodward

15

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 3-1. Schematic Diagram of PSG with Adjustable Droop

16

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 3-2. Schematic of PSG with External Return Spring

Woodward

17

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

 As the pilot-valve bushing rotates, the centrifugal centrifugal force increases and the flyweights pivot outward. This centrifugal force is opposed by the downward force of the speeder spring. Speeder spring compression, and therefore the speed at which the governor must run, is adjusted by the position of the speed adjusting system (e.g., lever, electric motor, or pneumatic). On-speed occurs when the centrifugal force of the flyweights balances the downward force of the speeder spring, with the flyweights exactly vertical, and the pilot-valve-plunger control land covering the control port of the rotating bushing.

Compensation Compensa tion System The compensating system consists of a buffer piston between two buffer springs, a needle valve, and a compensating land on the pilot-valve plunger. It provides temporary speed droop and must be properly attuned to the particular engine and load to provide stable operation. The buffer piston, located between two identical springs in the power piston, and needle valve in the hydraulic circuits between the pilot valve plunger and power cylinder, make up the buffer compensation system. This system stabilizes the governing action by minimizing over or undershoot following a change in governor speed setting or a change in load on the engine. It establishes a temporary negative feedback signal (temporary droop) in the form of a pressure differential which is applied across the compensation land of the pilot valve plunger. The flow of oil into or out of the buffer system displaces the buffer piston in the direction of flow. This movement increases the loading on one spring while decreasing the other and creates a slight difference in the pressures on either side of the piston. These pressures are transmitted to opposite sides of the plunger's compensation land to produce a net force, upward or downward, which assists in centering the plunger whenever a fuel correction is made. The length of time that the pressure differential is present is determined by the amount of oil allowed between the upper and lower compensation piston areas through the needle valve. Compensation bypass is provided to circumvent the compensation system during major transients. The bypass passage provides direct flow of pressure oil to both sides of the compensation land any time the buffer piston is moved too far from the centered position. Thus there is no compensation until the buffer piston returns to a more nearly centered position. The buffer piston and springs are carried in the power piston, but this location has no bearing on the action of the power piston, or on the action of the compensation system.

Fuel Increase Example The governor increases fuel to the engine with an increase in governor speed setting, or a decrease in engine speed due to an increase in load. Either the increase in the downward force of the speeder spring, or the decrease in centrifugal force of the flyweights, allows the pilot-valve plunger to move downward. Pressured oil is applied through the control port to the buffer system and into the power cylinder area. This causes the power piston to rise against the terminal lever and rotate the output shaft to increased fuel.

18

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

 At the same time, flow of oil to the compensation area moves the buffer piston from center in the upward direction. The pressure difference on each side of the buffer piston acts on the compensating land, and tends to center the pilot valve. Oil leaks by the needle valve, and dissipates the pressure difference. With increased fuel, the engine will gain speed, the flyweights will return to the upright position, cutting off movement of the power piston at the new fuel setting required by the change in load or speed.

Droop Feedback The rotation of the output shaft in the increase direction will also cause movement of the floating lever if the pivot point on the speed-droop bracket is off the center line of the output shaft.  Assuming positive droop is set into the governor, the pivot point will be to the left left of the center line and increase fuel will raise the end of the floating lever. This will reduce compression on the speeder spring and in effect lower the speed setting of the governor. Note that should the pivot point on the speed-droop bracket be to the right of the center line, it will cause the floating lever to increase the compression of the speeder spring on increased fuel, in effect increasing the speed setting. This condition is called negative droop. The governor will not provide satisfactory control with negative droop.

Fuel Decrease Example The governor decreases fuel to the engine with a decrease in governor speed setting or an increase in engine speed due to a decrease in load on the engine. Due to the decrease in speed setting or decrease in load, the centrifugal force of the flyweights overcomes the speeder-spring force and lifts the pilot-valve plunger. Upward movement of the pilot-valve plunger opens the control port to drain and the power piston is forced in the reduced fuel direction by the return spring.  At the same time, flow flow of oil from the compensation area housed in the power piston moves the buffer piston in the downward direction. The pressure difference on each side of the buffer piston acts on the compensating land, and tends to center the pilot-valve plunger. Oil leaks by the needle valve, and dissipates this pressure difference. As the engine returns to steady-state speed, the centrifugal force of the flyweights is again balanced with the downward force of the speeder spring. Positive speed droop, as described above, will cause an increase in relative speed setting with a decrease in load.

Woodward

19

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Chapt er 4. Chapter Trouble Troubl esho shooti oting ng and Ma Maintenance intenance Introduction This chapter covers various steps for maintenance of the PSG governor. The portion on troubleshooting provides information if trouble occurs. General troubleshooting advice and instructions for setting the needle valve and droop are provided in advance of the troubleshooting chart. If the minor adjustments do not help, removal of the governor from the engi engine ne for either a complete overhaul or return to an authorized repair facility for repair and testing may be required. Adequate instructions are provided for disassembly, reassembly, and testing of your governor. However, the test specifications for the particular governor must be requested from Woodward.

General Troubleshooting Governor faults are usually revealed in engine speed variation, but it does not necessarily follow that such speed variations indicate governor faults. Poor governing may be due to faulty operation of the engine or of auxiliary equipment.

Dirty Engine Oil The PSG governor is normally supplied with engine oil. A failed or dirty filter in the supply line or unusual oil contamination can cause governor problems. If the governor has been contaminated with dirty engine oil, it may be removed from the engine and flushed with a petroleum solvent. The use of non-petroleum-base solvents is not recommended as it may damage oil seals or gaskets. Fuel oil or kerosene are the best solvents for cleaning the inside of a PSG governor.

CAUTION—SOLVENTS   Al  Alw w ays dr ain th e go ver no r of of s sol ol ven vents ts bef or e retur ret ur ni ng it to th e engin eng in e to avoid the possible contamination of the engine oil supply. Oil contamination, oil viscosity, and oil supply are major causes of PSG governor problems.  An y chan  Any c han ge iin n t he vis v is co si ty of th e oi l sup s up pl ied to th e PSG gov ern or w il l require a change in th e needle va valve lve setting o f the go vernor.

Linkage The second most common cause of governor related problems is caused by the linkage from the governor to the engine. Always carefully inspect this linkage for wear or other changes when governor problems are suspected. If an external return spring is used, investigate this installation for changes or poor installation.

20

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Governor Drive Excessive backlash or a tight meshing of the gears driving the governor may cause speed variations or erratic control by the governor.

Check Che ck Lis t Before determining that a governor is the cause of speed variations or aberrations, conduct the following checks of engine/governor operation: 1.

Check the load to be sure that the speed changes observed are not the result of load changes beyond the capacity of the engine.

2.

Check engine operation operation to be sur sure e that all cylinders are firing properly properly and that the injectors are in good operating condition.

3.

Check the linkage between between the the governor and the the engine to make certain there is no binding or lost motion.

4.

Check for fuel pressure changes.

5.

Check the speed-setting mechanism for proper operation. Pneumatic-supply problems can effect the pneumatic head. Erratic motor operation or slippage in the clutch between the motor and the governor can affect motor speed setting.

6.

Check the engine drive to the governor.

7.

Check the oil supply to the governor.

Glossary of Terms HUNT—A rhythmic variation of speed which can be eliminated by blocking governor output manually but which will recur when returned to governor control. SURGE—A rhythmic variation of speed, always of large magnitude, which can be eliminated by blocking governor action manually and which will not recur when returned to governor control unless speed adjustment is changed or the load changes. JIGGLE—A high frequency vibration of the governor fuel rod end (or terminal shaft) and fuel linkage. Do not confuse this with normal controlling action of the governor. Jiggle can be extremely damaging to linkage and to the governor, even though it may not adversely effect governor speed control. DO NOT run a governor which has visible jiggle.

Woodward

21

 

PSG PS G Governor wit h Cast Iron Case Troubl e Engine hunts or surges

Probable Cause Compensation needle valve opened too far. Dirty or foaming oil. Loading or power piston sticking.

Improper relationship between governor output shaft travel and engine power output. Excessive backlash or binding in linkage. Excessive backlash or binding in fuel control. Insufficient utilization of governor output shaft travel. Negative droop set into governor. Governor case flooded with oil. Case drain line or drain through pilot-valve bushing plugged or restricted. Buffer spring(s) fatigued or broken. Springs too light. Governor parts worn (excessive internal leakage or not correctly adjusted).

Improper relationship between governor output shaft travel and engine power output.

Jiggle at governor output shaft

Power piston sticking in cylinder. Rough engine drive.

Failure of spring-driven flyweight head, if used.

Governor not mounted squarely on drive pad. Fuel control does not open sufficiently or quickly during starting

Low governor oil pressure.

Manual 37017 37017 Correctio n  Adjust needle valve as described in Chapter 2. Remove and drain governor and flush with fuel oil or kerosene. Check oil supply system for air entrapment or proper type of oil. Clean or replace filter. Change oil. Disassemble governor, if necessary, and clean. Governor shaft travel to power output should be about linear. Readjust or rework linkage to obtain a linear relationship between engine horsepower and output-shaft position. Repair linkage. Repair fuel control. Readjust or rework linkage to use more governor output shaft travel. Set correct percentage of positive droop. Clean drain passages and rework the drive to the governor to provide unrestricted drain. No back pressure is tolerated. Also, the drain passages in the case cavity must be free of back pressure. Replace spring(s). Install heavier springs (contact Woodward). Repair governor by replacing worn parts. Check flyweight pins and bearings for wear. Check flyweight toes for wear or flat spots. Check flyweight thrust bearing and centering bearing. Governor shaft travel to power output should be about linear. Readjust or rework linkage to obtain a linear relationship between engine horsepower and output shaft position. Repair if possible by cleaning and polishing. Check drive gear alignment. Check gear train for eccentricity or excessive backlash. Check gear mounting on shafts for looseness. Tighten camshaft drive chain, if used. Check vibration dampener, if used. Check for cyclic load variation. Remove flyweight-head assembly and check operation or torsion spring. Disassemble and clean parts. Replace torsion springs if fatigued or broken. Check for accumulated dirt. Loosen governor on pad and realign. Tighten attaching bolts or nuts evenly to proper torque value. Check governor oil supply system for restriction or foaming oil. Eliminate restriction. Clean or replace filter. Check for proper oil viscosity. Change oil. Check governor oil pressure relief valve for sticking plunger, fatigued or broken spring. Free plunger. Replace worn or damaged parts. Inspect pump check valves for operation. Clean or replace leaking check valves. Check governor pump gears and gear pockets for excessive wear. Replace worn parts.

22

Woodward

 

Manual 37017 37017 Troubl e Engine is slow to return to speed following a change in load or is slow in responding to a change in speed setting

Engine is slow to return to speed following a change in load or is slow in responding to a change in speed setting

Engine is slow to respond to increase in load Governor goes to and remains at full travel regardless of speed setting or load No output from governor

PSG PS G Governor wit h Cast Iron Case Probable Cause Compensation needle valve closed too far. Engine is overloaded. Compensation buffer piston sticking.

Governor case flooded with oil. Case drain line or drain through pilot-valve bushing plugged or restricted Low governor oil pressure.

Incorrect buffer springs in governor. Fuel supply restricted, or engine may be overloaded.

Reduce load. Remove governor and clean it thoroughly. Reinstall governor and clean or replace filter in oil supply system. Clean drain line or drain passages in pilot-valve bushing. Rework the drive to the governor to provide unrestricted drain. Check governor oil supply system for restriction or foaming oil. Eliminate restriction. Clean or replace filter. Check for proper oil viscosity. Change oil. Check governor oil pressure relief valve for sticking plunger, fatigued or broken spring. Free plunger. Replace worn or damaged parts. Inspect pump check valves for operation. Clean or replace leaking check valves. Check governor pump gears and gear pockets for excessive wear. Replace worn parts. Install correct buffer spring (consult Woodward). Clean fuel filters and fuel supply lines. Reduce the load.

Pneumatic speed-setting pressure trapped in air chamber due to clogged orifice or air inlet, or speed setting too high.

Clean orifice.

Power piston sticking because of dirty oil.

Remove and drain governor and flush with fuel oil or kerosene. Clean and replace filter in oil supply system. Change oil. Disassemble governor, if necessary, and clean. Check oil supply system. Check governor oil supply system for restriction or foaming oil. Eliminate restriction. Clean or replace filter. Check for proper oil viscosity. Change oil. Check governor oil-pressure relief valve for sticking plunger, fatigued or broken spring. Free

No governor oil pressure.

No response to changes in control air pressure setting (pneumatic speed setting)

Correctio n  Adjust needle valve as described in Chapter 2 2..

Failure of drive to governor. Damage to internal governor parts. Linkage binding or misadjusted. Dirty oil. Loading or power piston or linkage sticking.

Diaphragm ruptured. Control air pressure relief valve sticking in open position. Spring

plunger, replace worn or damaged parts. Inspect pump check valves for operation. Clean or replace leaking check valves. Check governor pump gears and gear pockets for excessive wear. Replace worn parts. Engine cranking speed too low. Repair drive to the governor. Disassemble governor, replace damaged parts. Repair or readjust linkage. Remove and drain governor and flush with fuel oil or kerosene. Clean or replace filter in oil supply system. Change oil. Disassemble and clean speed-setting mechanism, if necessary. Replace diaphragm. Clean relief valve. Repair or replace relief valve.

fatigued or broken.

Woodward

23

 

PSG PS G Governor wit h Cast Iron Case Troubl e Excessive overspeed with inadvertent control air over-pressure (pneumatic speed setting) Minimum or maximum control air do notpressures result in the desired idle or rated speeds (pneumatic speed setting) Engine will not carry full rated load

Probable Cause Control air pressure relief valve set too high. Orifice in control air pressure inlet too large or missing.

Governor speed settings not properly adjusted.

Fuel control does not fully open. Low governor oil pressure.

Fuel racks do not open far enough.

Improper load division between

Gas pressure too low. Slipping clutch (if used) between engine and driven load. Voltage regulator (if used) not functioning properly. Incorrect speed droop setting on one or more of the droop units.

paralleled units (one unit on zero droop—all others on droop)

Improper load division between paralleled units (all units on droop)

Different speed settings among the droop units. Incorrect speed droop setting on one or more units.

Different speed settings between units.

24

Manual 37017 37017 Correctio n Readjust or replace relief valve. Replace orifice.

 Adjust governor speed settings settings as described in Test section.

Check and adjust linkage. Check for binding in fuel control. Check governor oil-supply system for restriction or foaming oil. Eliminate restriction. Clean or replace filter. Check for proper oil viscosity. Change oil. Check governor oil-pressure relief valve for sticking plunger, fatigued or broken spring. Free plunger. Replace worn or damaged parts. Inspect pump check valves for operation. Clean or replace leaking check valves. Check governor pump gears and gear pockets for excessive wear. Replace worn parts. Engine cranking speed too low. Check fuel pump stops and adjust as necessary. Check governor fuel-rack relationship. Check linkage between governor and fuel pumps and adjust if necessary. Oil in governor may be too light, change to next heavier grade. Adjust pressure regulator in gas supply line. See clutch instruction manual. Readjust or repair voltage regulator. Increase droop on affected units until load remains steady on each droop unit. System load variation is absorbed by the lead unit with zero droop. Droop units assist in correcting speed deviations on large load changes but return to their original load after the load change is absorbed by the lead unit. Readjust speed setting on improperly set unit.  Adjust droop on each unit until desired division of load is obtained. Increasing droop results in the unit taking a smaller share of load changes; decreasing droop, a larger share. Readjust so that all speed settings are the same.

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 4-1. Speed Droop Adjustment

Speed Spe ed D Droo roop p Adju stment Figure 4-1 shows the internal droop governor with the top cover removed to expose the speed-droop mechanism and adjustments. The speed-droop bracket is clamped to the terminal lever by the socket-head screw. The speed-droop bracket, when loosened, is adjustable radially to the terminal shaft. When the bracket is moved, a pin on the bracket is moved radially from the terminal shaft's centerline to a radius of 1/2 inch. This pin controls the position of the speed-droop lever (floating, position feedback lever). When the pin is set at the centerline of the terminal shaft, the governor is set at zero droop. As the pin is moved away from the shaft's centerline, centerli ne, terminal-shaft rotation moves the pin and, therefore, the end of the speed-droop lever which pivots on the speed-droop pin. The resultant speed setting is a function of terminal-shaft position with speed setting decreasing as fuel flow increases. Since there is no calibration for the droop adjustment, the zero-droop position may be set only by trial and error on the engine, or by use of a dial indicator over the speed-droop lever during manual rotation of the terminal shaft. Zero droop will show no movement of the speed-droop (feedback) lever when the output shaft is rotated from minimum to maximum position. If speed droop is required, it it must be set by operation on the engine, readjusting the slide to obtain the desired speed droop between full load and no load.

NOTE The governor should not be operated with the cover removed. The The lowspeed stop is lo cated in the cover, a and nd on m ost uni ts the cover retains the return spr ing. The governor will not pr ovide dependable e engine-spee ngine-speed d contro l with th e cover removed. removed. G Governors overnors wit h internal droop adjustment must have the amount of dro op set with the cover removed and the engine engine stopped.

Woodward

25

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Settin Se tting g External Droop Some PSG governors are equipped with externally adjustable droop. These governors employ a lever inside the governor that moves a feedback pin through a slot in the terminal lever. Droop on these governors can be changed while the engine is running.

Negative Ne gative Droo Droop p Care must be taken while setting droop, either the internal or external settings, that the moveable droop fulcrum pin not be moved beyond the centerline of the governor terminal shaft. This condition will cause unstable governor operation. When setting zero droop, it is better to error in the direction of slight positive droop. If using a dial indicator while setting droop, the feedback lever must not increase the tension on the speeder spring while the terminal shaft is rotated toward maximum.

Needle Ne edle Va Valve lve A djus tment The needle valve adjusts the response rate of the governor. Properly set, the response rate will cause the governor to take a new fuel position with a minimum of overshoot and a minimum of settling time after a load change.  Adjust the needle valve when the engine is at operating operating temperature and the oil in the governor is at its normal operating temperature and likewise at the normal viscosity. Adjust with the needle valve as far open as possible while still providing stable response to load changes. To test the setting, manually disturb the linkage and observe the return to stable operation. Two or three fuel movements immediately after the speed deviation caused by the linkage disturbance is usually the desired response setting. Having the needle valve too far closed will make the governor sluggish and likewise will make the engine slow to respond to load changes. This can appear as engine power problems. Engine speed will not be stable with the needle valve too far open.

  WARNING—HOT OIL Do not back the needle valve clea clearr out of the threads as hot oil wil l squirt from the hole, potentially burning the operator. The governor will not operate correctly with the needle valve closed tightly. In general, the needle valve must be out 1/8 turn or more for correct governor operation. Having the needle valve closed more than necessary will prevent the most efficient and responsive performance of the engine. Most engines operate with the needle valve open one full turn or more. Governors are shipped from the factory with the needle valve open 1 and 1/4 turns. When properly set, the governor will be slow in response to load changes while the engine is cold, because the oil in the governor will be thicker, and slower to move through the needle valve opening. Always adjust the needle valve when the engine is at operating o perating temperature.

26

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Once set, the needle valve will not have to be adjusted unless there is a change in engine oil viscosity, linkage from the governor to the engine, or engine performance. Response changes that require a change in the needle-valve setting are probably caused by changes in the engine or in the linkage from the governor to the engine. Always inspect the linkage for wear or looseness before deciding that a needle-valve change is required.

Linearity and Output Shaft Rotation Unstable engine operation can be caused by faulty linkage arrangement between the governor and the fuel control. The terminal shaft should travel 24 degrees between no load and full load. Travel of less than 18 degrees should be corrected rather than running the governor with the needle valve more fully closed than necessary. For maximum stability governor output must be nearly linear with engine power gain. (A percent of the total governor travel will produce the same percentage change in the power output of the engine.) Adjusting the linkage to increase the amount of governor travel between no load and full load will normally permit increasing the opening of the needle valve and likewise improving the responsiveness of the governor and engine to load changes.

Jiggle The PSG is an extremely fast governor and will normally exhibit an active terminal shaft. This terminal shaft activity, or “jiggle”, is not connected with the response rates controlled by the needle valve. Excessive jiggle can damage linkage, engine parts, fuel valves, or the governor. Jiggle is often the governor's response to drive torsionals transmitted from the governor drive to the governor ballhead. These drive torsionals should be reduced, if possible. Some torsionals are caused by the misalignment of the governor on the governor pad and can be corrected by realigning the installation. In extreme cases it may be necessary to rebuild the governor drive. Oil-damped and spring-driven ballheads are available to filter out some types of drive torsionals. Worn or damaged governor parts can also contribute to a jiggle problem. Nicks on the pilot-valve-plunger control land are occasionally the cause. Minor jiggle, which does not cause undue wear to linkage, fuel valves, or engine parts, will not damage the governor and in most cases can be ignored. Jiggle which will cause damage must be controlled.

Removi Re movi ng a PSG PSG G Governo overnorr fr from om t he Engine For major repairs, or a complete governor change, remove the governor from the engine as follows: 1.

Disconnect the fuel linkage from the governor governor terminal shaft. Mark the position of the lever on terminal shaft before removing the lever.

2.

Disconnect the speed-adjusting linkage from the governor speed-control lever. Mark the position of the lever on the speed-adjusting shaft before removing the lever. For electric or pneumatic speed-setting options, disconnect the electrical connection or the pneumatic tubing from the governor.

Woodward

27

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

3.

Disconnect the oil inlet connections.

4.

Remove the four stud nuts holding the governor assembly tto o tthe he gover governor nor drive housing and lift the governor off the studs and away from the engine. (Some installations use bolts to attach the governor to the governor drive housing.) Remove the gasket between the governor and governor housing.

NOTE Use care in handling and setting down t he governor. Avoid striking t he end of the drive shaft a sharp blow as this c ould damage the governor governor oil p ump driving gear.

Tools for Disassembly and Assembly The tools shown in Figure 4-2 and listed in the following table are available from Woodward to facilitate the assembly or disassembly of the governor.

Figure 4-2. Assembly Tools

Tool De Descriptio scriptio n No. 1 Waldes Truarc Pliers No. 2 Waldes Truarc Pliers Welch Plug Assembly Tool Bending Tool Pilot Valve Plunger Wrench Seal Installation Tool Seal Installation Tool Idler Stud Installer Check Valve Assembly Tool Check Valve Assembly Tool 17/64 Drill, No. 5 Extractor 1/4 Drill, No. 4 Extractor Hard Arkansas Stone Seating Tool Droop Alignment Tool

28

No.

8995-084

Application remove and install snap ring remove and install snap ring install seal cup for spring pin on floating lever center pilot valve plunger place seal on terminal shaft seat seal in housing seat idler stud install check valves in case install check valves in base remove base check valves remove case check valves polish nicks and burrs seat retaining ring

8995-085

set zero droop (isochronous operation)

8995-077 8995-078 370109 8995-079 8995-080 8995-081 8995-082 8995-082 None None

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Governor Disassembly Refer to Figure 5-1 (exploded view) and the following steps for governor disassembly and assembly. Some PSGs have slightly different arrangements. These instructions apply to most PSGs. The exploded view is helpful when assembling or disassembling a governor. Before removing speed-adjusting screws, needle valve, and droop bracket, record their positions for future use in assembly.

NOTE

Do not disassemble the governor any more than necessary for the particular repairs or s ervice required. 1.

Clamp governor lightly in vice, using soft jaws below case-to-base joint.

2.

Remove the cover and sub cap (if (if used) used).. Many PSG gover governors nors use an internal return-spring system. In these cases the return spring can add complication to the removal of the cover or sub cap. If an internal vertical return spring is used, remove the two middle screws and insert No. 15 (0.180) drill blanks in the holes. Then hold the cover in place while removing the other three cover screws. Release the spring slowly. Use a similar system during assembly.

WARNING—SPRING DANGER  WARNING—SPRING Springs can cause personal inju ry and even dea death th if i ncorrectly released. Use extreme caution and follow the instructi ons wh en removing a cover from a PSG governor w ith a vertical return sp ring. 3.

Mark the position of the speed droop bracket if it is to be removed or loosened from the terminal lever, to permit assembly a ssembly with the bracket in about the same position. On units with externally adjustable droop remove the droop-link assembly.

Figure 4-3. Align Cover with Drill Blanks Woodward

29

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

4.

Unbend and remove remove the the spring-wire spring-wire pin that holds the fork of the speederspring assembly to the floating lever. Remove the floating lever. (Discard the used spring pin, do not attempt to re-bend it when the governor is assembled.)

5.

Remove the two two socket-head screws that hold the terminal shafts to the terminal lever. Remove the terminal shafts from the terminal lever l ever and remove the terminal lever from the assembly.

6.

If necessary remove the terminal-shaft bearings and oil seals from the body of the case. (The bearings are pressed into the case.) (It is best to replace the seals any time the terminal shafts are removed.)

7.

(Removal of the speed-adjusting shaft and speed adjusting lever and droop adjusting shaft and lever is not normally required.) If necessary, drive out the roll pin that attaches the speed-adjusting lever to the speed adjusting shaft. Remove the speed adjusting shaft from the case. An o-ring is used to seal the shaft against oil leakage. Be prepared to replace the o-ring if the shaft is removed. Units with externally adjustable droop will have split speed-adjusting shafts. A roll pin attaches the droop adjusting lever to the droop shaft in externally-adjustable droop governors. Remove this pin before removing the droop adjusting shaft.

8.

Remove the power-piston-stop screw (Figure 4-16, #3).

9.

Lift out the power-piston assembly (see Figures 4-15 & 4-16).

10. Using snap-ring pliers, remove the snap ring from the power-piston assembly and remove the spring seat, the lower spring, buffer piston, and the upper spring. The upper and lower springs are interchangeable within the governor but are not necessarily interchangeable between governors. 11. Wedge the pilot-valve wrench (Woodward part number 370109) between the coils of the speeder-spring assembly and spring seat. Hold the spring fork and bend spring towards the open end of the bottom coil. At the same time, turn the spring to disengage the coil from the seat lip (see Figure 4-5). Remove the spring fork and spring from the case. 12. Hold the spring seat with the short end of tool 370109 and use a 5/16" socket wrench to remove the pilot-valve-plunger lock nut. 13. Place a small screwdriver in the slot in the top of the pilot-valve plunger and screw the plunger down and out of the spring seat. 14. Lift out the spring-seat and thrust-bearing assembly. The thrust bearing consists of an upper and lower race and a bearing assembly. The races are interchangeable and reversible. There is not an “up” or “down” to the bearing assembly. 15. Remove the snap ring with snap-ring pliers and lift out the ballhead parts.

NOTE Be careful careful w hen separating separating t he base from the case as loose parts can be dropped and damaged. damaged. Be prepared to replace the oil s ea eall between the base and case before separating separating the tw o unit s. 16. Remove the three screws from tthe he base and carefully tap and pry the the base until the dowel pins holding the base to the case are free. Separate the base and case. 30

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 4-4. Removal of Terminal Levers

Figure 4-5. Removal of Speeder Spring

Figure 4-6. Pilot Valve Disassembly

Woodward

31

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 4-7. Removal of Ballhead

Figure 4-8. Base Separated from the Case

Figure 4-9. Pilot Valve Assembly 32

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

17. Remove the pilot-valve bushing from the case and the idler gear from the base. 18. Remove the internal snap ring from the upper end of the the pilot-valve bushing. 19. Separate the compensating bushing and pilot-valve plunger from from the pilotvalve bushing.

CAUTION—CARE OF PILOT VALVE PLUNGER  Do not d amage a any ny edges on the pilot-valve plunger. Store the plunger carefully to avoid avoid any contact with other parts which c ould nick th e sensitive sensitive control lands. 20. Remove the relief-valve assembly from the supply port on the governor case. Note the order of removal of the relief-valve parts as assembly must place the parts in the relief-valve bore in the correct order (see Figure 4-25). 21. Remove the needle valve and the needle-valve plug. The needle valve should be replaced to provide the most convenient access when the governor is on the engine.

NOTE If plugs are used in the base a and nd case record th e locations before removal to be sur e they are replaced in th e same posit ion s (see F Figu igu re 4-1 4-10). 0). The location of the plug s determines the direction of ro tation of the governor. If check valves are used, the governor can operate in both clockw ise and counterclo ckwis e rotation. The check valve valves s are pressed into th e base and and case and will be destroyed if removed. 22. Remove the plugs from the base and case if used.

Parts Pa rts Che Check ck and Clea Cleanin ning g Cleaning  All metal parts of the governor may may be cleaned in normal cleaning lines. Take particular care that the pilot-valve plunger, the pilot-valve bushing, and the thrust bearing and bearing plates are not damaged during the cleaning operation. Dry the washed parts with a soft, lint-free l int-free cloth or blow dry with shop air. Take particular care that all oil passages in the governor case are clear.

Parts Check 1.

Check all parts for wear, corrosion, cracks, nicks, and burrs.

2.

Check threads for stripping or cross-threading.

3.

Check for mismatching of serrations or other tooth damage.

4.

Check idler gear and stud stud ffor or wear in mating parts. Particularly check check idler stud for wear. (New specifications call for the stud diameter to be 0.3035 to 0.3038. The inside diameter of the idler gear specifies 0.3045 to 0.3050). Check pump gear teeth for wear.

Woodward

33

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

5.

Check the gear pockets for excessive wear. Factory tolerance c calls alls for the gear pockets to be 0.263" to 0.2635" deep.

6.

Check power-cylinder bore and pilot-valve-bushing bores for roundness and wear. Replace the case if wear is excessive.

7.

Carefully inspect the power power piston for wear. wear. Inspect the buffer buffer piston and the buffer-piston bore in the power cylinder cylinde r for wear. The buffer piston must slide freely in the power cylinder. Check that the grooves around the buffer piston are clean. Grit and dirt in the system may freeze the buffer piston.

8.

Check that the pilot-valve plunger has square edges on tthe he control control lands.  Any nicks or burrs on the control lands will prevent optimum governor operation.

9.

Check that the pilot-valve plunger moves freely in the pilot-valve bushing. Take particular care not to damage the control lands on the plunger while checking for free motion.

10. Check the thrust-bearing races for wear. The races are reversible and interchangeable. Replace the bearing if it is necessary to replace the races. 11. Check toes of flyweights for flat flat spots. Replace flyweights if the flat spots exceed 0.89 mm (0.035"). Smaller flat spots may be stoned out with a hard  Arkansas stone. 12. Check all pivot-pin holes and pivot pins for wear.

Parts Repair and Replacement 1.

Chase any damaged threads.

2.

Polish corroded areas with a hard Arkansas stone.

3.

Remove flat spots spots from the flyweight flyweight toes with tthe he hard stone. If possible, replace the flyweights with new ones.

4.

Replace all o-rings.

5.

Replace the seals on the terminal shaft and speed-setting shaft(s).

6.

Replace any Welsh plugs removed during disassembly (not used on all governors).

7.

If check valves were removed, they must be replaced.

8.

The spring-wire spring-wire pin that connects the the floating floating lever to the speed adjusting lever must be replaced.

34

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

 As s em emb b ly Perform assembly in a dust-free environment. Refer to the exploded view in Chapter 5 which most closely represents your governor before starting assembly. Lubricate all o-rings with petroleum jelly before installation. Protect the new orings from damage with installation tools whenever possible. O-rings are easily damaged when installed over serrations or threads.

Basic Assembly 1.

Replace all plugs removed from the governor governor case and base. Use new orings around all plugs. Use Loctite 242 sealant or equivalent to seal the plugs. Put sealant on plug threads, not in the hole.

NOTE Leave out the 1/8" 1/8" pipe plug in line with t he pilot-valve bushin g on th e governor b ase until after the pilot valve plunger is assembled and adjusted. 2.

Seat new check valves in base and case. Use tool 8995-083 for for seating valves in base and tool 8995-082 for seating valves in case. The tools seat the valves to the correct depth.

CAUTION—CARE OF CHECK VALVES  The check valves can be easily easily damaged damaged if t he correct tool is not used for installation. If plugs were used, install new o-rings on the plugs and install exactly as removed. Governor rotation is not reversible when plugs are used. Rotational direction is determined by viewing the drive pad on the engine and observing the direction of rotation of the drive coupling. Figure 4-10 shows plugs with o-rings installed for clockwise rotation. 3.

Place idler stud (if previously removed) removed) in position and press into base with tool 5995-081.

4.

Assemble the pilot-valve plunger parts as shown in Figures 4-11 and 4-12. 4-12. Use Truarcring pliers fit inside retaining ring into pilot-valveSee plunger. SeatWaldes the retaining intotothe groove withtop toolof8995-048. Figure 4-13.

5.

Assemble base to case with parts parts as shown in Figure 4-14. Insert pilot valve bushing in the case and idler gear in the base. Place oil seal ring, flat side down, in groove provided in the base. Secure base to case with three screws. Check that the pilot-valve bushing rotates freely. It may be necessary to loosen the base, free the gears and then tighten the base again.

NOTE Damaged Da maged alignment pins must be replaced.

Woodward

35

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 4-10. Plugs Installed for Counterclockwise Rotation (install plugs in left-hand holes for clockwise rotation)

Figure 4-11. Pilot Valve Bushing Assembly

Figure 4-12. Assembly of Compensating Bushing

36

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 4-13. Seating the Retaining Ring

Figure 4-14. Base to Case Assembly

Figure 4-15. Assembly of Buffer System

Woodward

37

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 4-16. Installation of Power Piston and Piston Stop Screw

Figure 4-17. Installation of Ballhead

38

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 4-18. Thrust Bearing and Speeder Spring Parts

Figure 4-19. Centering the Pilot Valve Plunger

6.

Assemble buffer buffer system parts into the power piston. Note Note the position of the holes in the buffer piston. They must be in this position for proper operation. The buffer springs are interchangeable top to bottom, but not necessarily interchangeable between governors. Different governor applications require buffer springs with different scales. Use Truarc pliers to install the retaining ring.

7.

Place the piston into the case. Install the piston stop screw, if used. (Piston stop screws are not necessary in governors with vertical return springs in the cover.) If a piston stop screw is used, secure it to the case with a thread seal and elastic stop nut.

8.

Assemble flyweights to the ballhead with with pins and secure by fitting the ring around the ballhead assembly. The retaining ring has a reduced inner diameter to prevent shifting during governor operation. Use care not to overstress the ring during installation.

Woodward

39

 

PSG PS G Governor wit h Cast Iron Case 9.

Manual 37017 37017

Assemble lower race, thrust bearing, upper race, spring seat, nut and speeder spring. The upper and lower races are interchangeable and reversible. Both sides of the lower race must be “good”. Only the side toward the bearing must be “good” on the upper race.

10. Use a screwdriver and guide the spring seat and nut onto the pilot-valve plunger. Hold the spring seat and nut, and turn the plunger counterclockwise, threading seat and nut on until the nut is just below the top of the plunger. 11. Release the nut and continue threading the spring seat down until it bottoms.

Centering the Pilot Valve 1.

Turn the pilot valve bushing until until the port is visible through the base.

2.

Push on the flyweight toes to lower the pilot-valve plunger as ffar ar as possible. Check distance A (Figure 4-19). Pivot flyweights out as far as possible and check distance B. Distance A must equal distance B when flyweights have been moved from the extreme inward i nward to the extreme outward position.

3.

If the control contr land is too high, wrench 370109 the the spring seatolstationary and turnuse thepilot-valve plunger clockwise to lowertoit.hold Should control land be too low, turn the plunger counterclockwise while holding the spring seat stationary.

4.

When the pilot-valve plunger is centered (the (the same amount of opening in the port when the flyweights are full out as there is when the flyweights are clear in), tighten the nut by torquing it to 7.9 N m (70 lb-in) while holding the spring seat stationary. 

5.

Check the setting again and, if correct, seal the inspection port by installing the plug with Loctite 228.

6.

Install the speeder speeder spring spring onto the spring spring seat. Place ttool ool 370109 under the spring seat and force the spring seat upwards and at the same time place the speeder spring on top of the spring seat. Hold the spring seat in place and push the spring down and turn clockwise to secure to the spring seat. When properly assembled, the pilot valve can be lifted by the speeder spring.

Droop Assembly 1.

40

Internal Droop: a. Assemble the the droop bracket to the terminal lever. Do not tighten the screw. b. Align the droop bracket to zero droop, using tool 8995-085 as shown, shown, aligning the pin in the droop bracket with the end of the tool. Tighten the screw. If droop is required for governor operation, it must be set after the governor is completely assembled, preferably on a test stand. c. The dr droop oop bracket pin may may be installed to the right of the centerline if droop is desired in the governor (the farther right of centerline the more droop the governor will provide). The droop pin must not be set to the left of centerline. Woodward

 

Manual 37017 37017 2.

PSG PS G Governor wit h Cast Iron Case

External Droop: a. Assemble the speed-adjustment and droop-adjustment shafts into the governor. (The droop-adjustment shaft has a smaller roll-pin hole than the speed-adjustment shaft.) b. Add the the torsion torsion spring (if used) to to tthe he speed-adjustment speed-adjustment shaft, and the speed-adjustment lever. Notice that the 45-degree notch on the speedadjustment lever must be up. Use the appropriate roll pin to attach the lever to the shaft. Connect the torsion spring to the speed-adjustment lever, if necessary.

NOTE The speed-adjustment speed-adjustment shaft and the dro op-adjustment shaft can b e assembled from either side. Check Check to make sure the assembly is correct fo r the final governor inst allation. c.

d.

Insert the droop-adjusting shaft through the bushing and attach the droop-adjusting lever, relieved side toward the case, with the appropriate roll pin. Attach the droop-link assembly to the droop-adjusting lever. Normal assembly is for the lever to attach directly to the link with the spacer going on the side of the link away from the lever. The speed-adjusting lever must be able to operate between the shafts of the droop link assembly.

Final Assembly 1.

Assemble the terminal lever and terminal shafts into the case.

2.

Assemble the floating lever to the speed speed adjusting lever and the speeder spring fork with the wire clip. The slot in the floating lever engages the droop pin on internally adjusted droop governors. Externally adjusted droop governors engage the slot of the floating lever with a pin through the droop link assembly. Sliders go on both sides of the pin, and upper slides then bolt to the terminal lever to engage the movable droop pin.

3.

Bend wire pin forward with tool 8995-078.

4.

Place tool 8995-079 on either a speed-setting or droop-adjustment shaft and slide the seal onto the tool with the cup facing the governor. Insert the seal with tool 8995-080. Seals must be installed over all shafts which extend from the governor. Shafts are the same size and seals are interchangeable. Some governors are built without some shafts extending from the governor. Welsh plugs must be installed over all these short shafts. Install the Welsh plugs to the proper depth with tool 8995-077.

5.

Assemble the four-piece relief valve, add the copper washer, and screw screw into the case.

6.

Install the needle valve/o-ring and the needle-valve plug/o-ring assemblies. Turn the needle valve clear in, then back out 1 and 1/2 turns for an initial test position.

7.

Woodward

Assemble the low-speed stop screw and lock nut in the cover.

41

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 4-20. Using Tool to Set Zero Droop

Figure 4-21. Assemble External Droop

Figure 4-22. Speed and Droop Adjusting Shafts and Terminal Lever Assembled 42

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 4-23. Bending the Wire Clip

Figure 4-24. Install Seals on All Shafts

Figure 4-25. Relief Valve and Cover Installation

Position the gasket on top of the case and secure the cover to the case with five screws. Use two drill blanks to aid in the assembly of an internal vertical return spring. Woodward

43

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Testing It is important to test the governor, either on a test stand or on the engine it operates on. Woodward makes a test stand (8909-053) which makes the testing of PSG and many other governors safe and efficient. Various adapters are also available to permit test stand operation of a test PSG governor. Special test equipment, while recommended, is not necessary for the testing of a governor. If accurate tests are to be run on governors, contact Woodward and obtain a copy of the test specification for each particular governor. If adequate test facilities are not available, make minor tests before and after installation on the engine. Before installation, check that there is no negative droop by attaching a dial indicator to the governor case so the indicator rod rides on top of the floating lever directly above the pilot valve plunger (center of the spring fork on the speeder spring). Rotate the terminal lever from minimum to maximum fuel position and observe the dial to see whether or not there is movement of the floating lever. No movement of the indicator is zero droop. Upward movement of the lever is positive droop. Check the final droop setting with the governor operating on the engine. Only zero droop (isochronous operation) or positive droop is allowed. If the bracket is set on a previously scribed line, droop should be very close to the correct amount. Reset low-speed and high-speed stop screws to pre-measured settings after installation on the engine. Make sure all linkages are correctly installed. Then start the engine.

WARNING—START-UP  Be prepared prepared to make a an n emergency shutdow n wh en starting th e engine, turbine, or other type of prim e mover, to protect against run away or overspeed with poss ible personal injury, loss of l ife, or property damage. damage.  Assuming that everything is operating properly, turn turn the needle valve in as far as it will go, then back it out until the engine hunts (about 1 and 1/2 turns). Let the governor hunt for about a minute. This allows air to bleed out of the oil passages. Close the needle valve to just enough to stop the hunt and provide optimum performance. Check that the correct amount of droop is set and, if necessary, readjust the droop bracket.

Test Te st Equip ment Woodward electric drive test stand (part number 8909-051) should be used to test a reassembled PSG governor and to set the high-speed stop, the low-speed stop, and droop before installation on an engine. (Many other test stands will adequately test and calibrate the PSG governor.) The needle valve will still have to be set for the individual response characteristics of the engine.  Adapter kit 6995-637 and multiplication drive assembly 5337-509 are required for testing a PSG governor on a test stand. 44

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Chapt er 5. Chapter Repl Re placeme acement nt Pa Part rts s When ordering replacement parts, include the following information: Governor serial number and part number shown on the nameplate Manual number (this is manual 37017) Part reference number and part name from parts list •

• •

WARNING—SPRING DANGER  WARNING—SPRING Injury may result if c ompressed sprin gs are relea released sed suddenly. Use the proper equipment to r emove springs and spr ing covers. Re Review view the disassembly information in the preceding chapter before before disassembly to prevent damage to certain critical surfaces and to provide necessary positio n marks for assembly.

Parts List for Figures 5-1 and 5-2 Ref. 37017-1 37017-2 37017-3 37017-4 37017-5 37017-6 37017-6A 37017-6B 37017-6C 37017-6D 37017-7 37017-8 37017-9 37017-10 37017-11 37017-12 37017-13 37017-14 37017-15 37017-16 37017-17 37017-18 37017-19 37017-20 37017-21 37017-22 37017-23 37017-24 37017-25 37017-26 37017-27 37017-26A 37017-28 37017-29 37017-30 37017-31 37017-32 37017-33 37017-34 37017-35 37017-36

Part Descr ipt ion .... ......... .......... ......... .........Q .....Quant uant ity Case .............. ............................ ............................ .......................... ............ 1 Not used Droop Setting Bushing................... Bushing........................... ........ 1 Speed Setting Bushing .............. .......................... ............ 1 .067-27 Hex Socket Plug ............. ....................... .......... 3 Screw, 10-32 x 1.062 Speed Setting Stop2 Nut, 10-32 Hex .............. ............................ ........................ .......... 3 Washer, No. 10................... 10................................ ................... ...... 3 Thread Seal ............ .......................... ............................ ................. ... 3 Power Piston Stop Screw ............ ...................... .......... 1 Screw, Needle Valve ............ .......................... ................. ... 1 O-Ring, .176 ID................. ID............................... ..................... ....... 2 Plug, .250-28 ............. ........................... ............................ .............. 1 Not used Snap Ring, Internal, .584 Free Dia. ....... 1 Seat, Buffer Spring ............. .......................... ................... ...... 1 Spring, Buffer............. Buffer........................... ............................ .............. 2 Piston, PG Buffer....................... Buffer................................... ............ 1 Power Piston......... Piston....................... ............................ ................... ..... 1 Plug, Relief Valve ............ .......................... ...................... ........ 1 Washer, .703 x .875.......... .875........................ ..................... ....... 1 Spring, Relief Valve .............. ............................ ................. ... 1 Spring, Sleeve ............. ........................... .......................... ............ 1 Relief Valve Plunger ............. ........................... ................. ... 1 Relief Valve Sleeve Assembly ............ ............... ... 1 Not used Base, PSG...................... PSG................................... ....................... .......... 1 Soc. Hd. Pipe Plug, .125 Inch................ 2 Taper Pin ............ .......................... ............................ ..................... ....... 2 Rotational Plug .............. ............................ ........................ .......... 2 O-Ring, .239 ID x .070 Inch ........... ................... ........ 2 Check Valve, optional ............. .......................... ............... .. 4 Idler Gear.............. Gear............................ ............................ ................... ..... 1 Idler Gear Stud ............ ......................... .......................... ............. 1 Pilot Valve Bushing................. Bushing............................... ................ 1 Pilot Valve Plunger ............. ........................... ................... ..... 1 Bushing, Compensating.......... Compensating........................ ................ 1 Internal Retaining Ring .............. .......................... ............ 1 Ballhead............. Ballhead........................... ........................... ...................... ......... 1 Flyweight. Flyweight............... ............................ ............................ ................... ..... 2 Pin ............. ........................... ............................. ............................. ................ 2 

Woodward

Ref. Part Descripti on ... ...... ...... ...... ...... ...... ...... ..... Quantity 37017-37 Retaining Snap Ring ............................ ..............................1 ..1 37017-38 Spirolox Ring............ Ring .......................... ............................ ................1 ..1 37017-39 Thrust Bearing Assembly .......................1 .......................1 37017-40 Spring Seat ............ .......................... ............................ ..................1 ....1 37017-41 Nut, Pilot Valve Plunger .............. .........................1 ...........1 37017-42 Speeder Spring Assembly................... Assembly......................1 ...1 37017-43 Drive Screw, #2 x .125 Inch ............ ...................2 .......2 37017-44 Nameplate..............................................1 37017-45 Not used 37017-46 Spring, L.H. ............ .......................... ............................ ..................1 ....1 37017-47 Terminal Shaft Bushing............ Bushing ..........................2 ..............2 37017-48 Oil Seal.......... Seal........................ ............................ ...........................2 .............2 37017-49 Not used 37017-50 Speed Adjust Shaft .......................... ................................1 ......1 37017-51 Speed Adjusting Lever .............. ...........................1 .............1 37017-52 Roll Pin.................................. Pin............................................... .................1 ....1 37017-53 Welch Plug ........................... ......................................... ..................2 ....2 37017-54 Spring Wire Pin ............ ......................... ..........................1 .............1 37017-55 Floating Lever Assembly ........................1 ........................1 37017-56 Not used 37017-57 Terminal Shaft.................................. Shaft........................................2 ......2 37017-58 Terminal Lever .............. ............................ .........................1 ...........1 37017-59 1/4" Flat Washer............................. Washer.....................................1 ........1 37017-60 Screw, 10-32 x .625 Inch Soc Hd ...........2 ...........2 37017-61 Droop Adjustment Bracket .....................1 .....................1 37017-62 Screw, 10-32 ............ .......................... ............................ ................1 ..1 37017-63 Not used 37017-64 Cover Gasket .............. ............................ ...........................1 .............1 37017-65 Cover......................................................1 37017-66 Not used 37017-67 Not used 37017-68 Cover Screw.............................. Screw...........................................5 .............5 37017-69 Not used 37017-70 Not used 37017-71 Not used 37017-72 Not used 37017-73 Not used 37017-74 Preformed Packing Ring ........................1 ........................1 37017-75 Not used 37017-76 Screw............... Screw ............................. ............................ ....................... ......... 1 

45

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 5-1. Exploded View of Basic PSG Governor 46

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 5-2. Basic PSG with Internal Droop and External Return Spring

Woodward

47

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Chapt er 6. Chapter  Au  A u x i l i ar ary y Eq Equ u i p m ent en t Introduction This chapter includes information about auxiliary equipment that your governor may have. Using instruction this sectionand in conjunction withPSG the other chapters in this manual provides parts for most governors.  Auxiliary equipment supported by information in this chapter includes: Spring-driven, oil-damped ballhead Torsion spring Pneumatic speed setting Electric motor speed setting Externally adjustable droop Temperature compensated needle valve Fuel rod Internal return spring (vertical or horizontal) • • • • • • • •

Spring-driven, Spring-dr iven, OilOil-damped damped Ballhead  A spring-driven, oil-damped ballhead serves as a filter for torsional torsional vibrations that originate in the drive to the governor. It consists of a ballhead drive cup (driving element) driven from the rotating bushing. The ballhead rests on a thrust bearing carried by the driver. A torsion spring connects the ballhead to the rotating bushing. Torsional vibrations cause relative motion between the drive cup and the ballhead. This movement is inhibited by the action of a volume of oil being forced through a relatively narrow leak path, which provides the damping action. The ballhead fills with oil through a combination of pressure feed and centrifugal action. The fill time varies with dimensional tolerances, governor pressure, and oil viscosity. The ballhead drains down partially on shutdown. Since the oil-feed circuit functions whenever the governor is operating, there is a continuous flow of oil through the ballhead assembly. If the supply of oil is not clean, contaminates will accumulate in the ballhead and the ballhead will eventually assume the characteristics of a solid ballhead. If the governor is subject to excessive dirt accumulation, consider using a separate sump system.

Ballhead Check Check for dirt accumulation by holding the governor drive shaft and turning the ballhead against its internal stop. Repeat in the opposite direction. Travel should be smooth and about 22 degrees is each direction. Replace the ballhead if it does not return promptly to mid position when released. Replace the cover if it is damaged or dished. Damage is normally attributed to rough handling. Check that the flyweights have no flat spots on the toes and that the flyweight bearings are not worn. Also check pivot pins for wear or damage. 48

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Parts Pa rts List for Figure 6-1 6-1 Ref. Part Descr ipt io n ..... .......... ......... ......... .........Qu ....Qu anti ty 37017-90 Ballhead Cover ............. ........................... ..........................1 ............1 37017-91 Ballhead Drive Cup ............. ........................... ....................1 ......1 37017-92 Ball Bearing ............. ........................... ............................ .................1 ...1 37017-93 Torsion Spring .............. ............................ ..........................1 ............1 37017-94 Flyweight Pin........... Pin........................ ........................... ...................2 .....2 37017-95 Ballhead..................................................1 37017-96 Flyweight.................................................2 37017-97

Needle Bearing ............. ........................... ..........................4 ............4

Figure 6-1. Exploded View of Oil-damped Ballhead

Torsion Spring  A torsion spring is provided on PSGs that are equipped with with an electric motor for speed setting. The spring is also provided on governors that are not equipped with a speed adjusting shaft, and on governors that are operated below 800 rpm. The spring forces the speed-adjusting lever to maintain contact with either the speed-adjusting screw or the adjusting shaft on the motor. When used with external droop, the spring must mount on the speed-adjusting sleeve, on the side opposite the droop-adjusting shaft.

Woodward

49

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Pneumatic Pne umatic Spe Speed ed Setting Remote speed adjustment is provided through a pneumatic speed-setting assembly consisting of a diaphragm, housing, oil reservoir, adjusting screws, and pushrod, extending down through the cover to the floating lever. Air signal pressure to the speed-setting assembly is applied to an oil reservoir to damp out oscillations of air compression. Oil pressure, acting on the diaphragm, is transmitted by the pushrod to the governor floating lever, increasing or decreasing the speeder-spring force to produce a change in speed setting. Pneumatic speed setting is factory preset to specified minimum (idle) speed at a minimum control air pressure of typically 21 kPa (3 psi), and to specified rated speed at a maximum control air pressure of typically 103 kPa (15 psi). Field adjustment is not normally recommended. The schematic diagram of a PSG with horizontal return spring and pneumatic speed setting illustrates the relationship of the speed setting head to the governor speed setting system. In an overhaul or repair situation, the main parts that may need replacement are the bellofram seals, rolling diaphragm, springs, and all o-rings. Figures 6-2 and 6-3 show the pneumatic speed setting equipment. When assembling a governor with pneumatic head, position the floating lever with the edge with the 45-degree angle down and the hole on top. The positioning of the floating lever is the opposite from other types of PSG governors.

50

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 6-2. Schematic of Pneumatic Speed Setting and PSG Governor

Woodward

51

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Parts Pa rts List for Figure 6-3 6-3 Ref. 37017-101 37017-102 37017-103 37017-104 37017-105 37017-106 37017-107 37017-108 37017-109 37017-110 37017-111 37017-112 37017-113 37017-114 37017-115 37017-116 37017-117 37017-118 37017-119 37017-120 37017-121 37017-122 37017-123 37017-124 37017-125 37017-126 37017-127 37017-128 37017-129 37017-130 37017-131 37017-132 37017-133 37017-134 37017-135 37017-136 37017-137 37017-138

52

Part Descr ipt ion .... ........ ......... .......... ......... ...... Quanti ty Accumulator assembly ............. .......................... ............... 1 #4 DL plug plug.............. ............................ ............................ .................. .... 1 O-ring 0.500 O.D. .............. ............................ ..................... ....... 2 Adjustment screw ............ ......................... .......................1 ..........1 Bellofram Cover Assm................ Assm............................1 ............1 Screw, 10-32 x 0.750............ 0.750.......................... .................. .... 4 Not used O-ring, 0.203 I. I.D., D., 0.343 O.D........... O.D.................. ....... 1 Nut, 10-32.......... 10-32........................ ............................ .......................1 .........1 Not used Plate retainer retainer.............. ............................ ............................1 ..............1 Bellofram seal............. seal........................... ............................1 ..............1 Bellofram cup assembly. ............ ........................1 ............1 Needle thrust bearing ............. .......................... ................ ... 1 Washer, 1.250 O.D.............. O.D............................ ................... ..... 1 Pneumatic speed setting spring ............ .............. 1 Shutdown plunger spring....................... spring......................... 1 Washer, 0.625 O.D.............. O.D............................ ................... ..... 1 Spring seat ............. ........................... ............................ .................. .... 1 Speed Adjustment Body ............ ........................ .............. 1 Not used Nylon plug .............. ............................ ............................ .................. .... 1 Nyloc 8 8-32 -32 x 0.500 set screw......... screw..................1 .........1 Seal retainer retainer............. ........................... ............................ ................ .. 1 Socket head 10-32 screw ........... .......................5 ............5 Not used Not used Cover................. Cover............................... ............................ .......................1 .........1 Cover gasket .............. ............................ ............................1 ..............1 Steel washer, 0.203 I.D. .........................2 .........................2 Socket head cap screw, 10-32 ............ ............... ... 2 Seal bushing............. bushing........................... ............................ ................ .. 1 O-ring .............. ............................ ............................ .........................1 ...........1 Rolling diaphragm ............. ........................... ..................... ....... 1 Diaphragm clamp washer.......................1 Diaphragm clamp washer.......................1 Bower retaining ring............. ring........................... ................... ..... 1 Output rod end assembly ............. .......................1 ..........1

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 6-3. Exploded View of PSG Sealed Pneumatic Speed Setting

Woodward

53

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Parts Pa rts List for Figure 6-4 6-4 Ref. 37017-151 37017-152 37017-153 37017-154 37017-155 37017-156 37017-157 37017-158 37017-159 37017-160 37017-161 37017-162 37017-163 37017-164 37017-165 37017-166 37017-167 37017-168 37017-169 37017-170 37017-171 37017-172 37017-173 37017-174 37017-175 37017-176 37017-177 37017-178 37017-179 37017-180 37017-181

54

Part Descr ipt ion .... ........ ......... .......... ......... ...... Quanti ty Accumulator assembly ............. .......................... ............... 1 #4 DL plug plug.............. ............................ ............................ .................. .... 1 O-ring 0.364 I.D. X .070 ............ ........................ .............. 2 Adjustment screw ............ ......................... .......................1 ..........1 Bellofram Cover Assembly .............. ..................... ....... 1 Screw, 10-32 x 0.750............ 0.750.......................... .................. .... 4 Not used O-ring, 0.208 I. I.D., D., 0.070 O.D........... O.D.................. ....... 1 Nut, 10-32.......... 10-32........................ ............................ .......................1 .........1 Not used Plate retainer retainer.............. ............................ ............................1 ..............1 Bellofram seal............. seal........................... ............................1 ..............1 Plug. ............ .......................... ............................ ............................ ................ 1 Nyloc set screw, 8-32 x .500 ........... ..................1 .......1 Soc. Hd. cap screw, 10-32 .............. ..................... ....... 2 Steel washer, .203 I.D. ...........................2 ...........................2 Not used Body . .............. ............................ ............................ .........................1 ...........1 Pneumatic head cup assembly.............. assembly................ 1 Bearing.......................... Bearing........................................ .........................1 ...........1 Washer, 1.250 O.D.............. O.D............................ ................... ..... 1 Spring........................ Spring...................................... ............................ ................ 1 Spring........................ Spring...................................... ............................ ................ 1 Washer, 0.625 O.D.............. O.D............................ ................... ..... 1 Spring seat ............. ........................... ............................ .................. .... 1 Not used Drain pipe plug, .250 NPT ............. ......................1 .........1 Socket head screw, 10-32 ............ ......................5 ..........5 Not used Cover................. Cover............................... ............................ .......................1 .........1 Gasket........................ Gasket...................................... ............................1 ..............1

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 6-4. Unsealed Pneumatic Speed Setting

Woodward

55

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Spee peed d Adjusting Motors  An electric speed adjusting motor, mounted on the the PSG cover, is used for remote adjustment of the governor speed setting. se tting. There are two types of motors available. The Pittman motor is of the permanent p ermanent magnet type, 12 or 24 Vdc. When supply voltage is other than 12/24 Vdc, the following Woodward control boxes will covert the supply voltage to 12 or 24 Vdc for use by the motor speed setting: 24 Vdc P/N 8272-515 110 Vdc P/N 8272-518 110 Vac P/N 8272-516 220 Vac P/N 8272-517

Figure 6-5. PM Motor Wiring Diagram (switch not furnished)

The Bodine motor has a split field. The motor is a series-wound reversible type. It is available in all standard voltages.  A manual speed adjusting knob is included on all units fitted with the speed adjusting motor.

Figure 6-6. Wiring Diagram for Bodine Motor (switch not furnished)

The PM or Bodine motor is coupled to the governor speed-setting mechanism through a friction clutch. If the operator runs r uns the speed adjustment to its limit, the clutch is set to slip, protecting the speed-adjusting motor. Connect the electric speed setting as shown in the accompanying diagrams. Voltage for the Bodine motor is shown on the motor. The Pittman motor operates on dc power.

56

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

If the cover and PM motor are ordered separately for use on an existing governor, all that is required for the installation of the new cover is to remove the old cover before setting the new assembly in place on the governor. Some adjustment for mounting may be necessary. Loosen the screws holding the PM motor in place and align the motor shaft with the clutch. Tighten the screws. When the cover is used without the PM motor, a screw is placed in the hole where the motor drive shaft normally fits. This screw is then used as a low-speed stop. The cover also houses a vertical return spring, when one is used.

Speed Spe ed Adjust ment Rotating the speed-adjusting lever and shaft, using a speed-adjusting motor, changes the governor speed setting. See the schematic diagram for reference. One end of the floating lever attaches to the speed-adjustment lever. The other end of the lever pivots about the speed-droop pivot pin. The spring-fork/speedspring assembly connects to the floating lever. Rotating the speed-adjusting lever changes the compression of the speeder spring. This changes the speed that the governor must run to develop the flyweight force necessary to balance the spring force. Turning the speed-adjusting screw, either manually by turning the knurled friction clutch or electrically byMaximum means of speed the speed adjusting motor, repositions the highspeed-adjusting lever. setting is established by setting the speed stop screw to limit travel of the speed-adjusting lever.

Externally Adjus ted Spe Speed ed D Droo roop p Many PSG governors are built with externally adjusted droop. Speed droop is adjustable externally between zero and seven percent, depending on speed setting, speeder spring, flyweights, and terminal shaft travel. Speed droop is used to permit load division between two or more engines driving generators in parallel or connected to a single shaft. If the engine is operated alone, or on a dc system with proper generator compounding, the governor may be set for zero droop (isochronous operation). For ac generating units tied in with other units, set the droop sufficiently high to prevent interchange of load between units. If one unit in the system has enough capacity, set its governor to zero droop and it will regulate the frequency of the entire system. This unit can then take all load changes within the limits of its capacity and will control frequency if its capacity is not exceeded. The speed-droop bracket is positioned by means of the speed-droop bracket screw, lever, and two screws on the outside of the governor case. Two values of droop can be established and a rapid change made between them. A stop screw in the end of the cover is factory set to establish the zero droop setting and requires no adjustment. If the percent of droop has not been specified at the time of manufacture, the maximum droop position should shoul d be set with the screw at the back of the adjustment. Use the bracket screw to lock the droop setting at either of the two positions, or to select a third position.

Woodward

57

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 6-7. Schematic Diagram of PSG (horizontal internal return spring, externally adjustable droop, and electric speed setting)

58

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 6-8. Adjustable Speed Droop Parts

The speed-droop lever is mounted on the droop shaft, supported by the governor case. The inner end of the shaft is joined to one end of the droop linkage with a roll pin. The other end of the linkage carries a pivot pin that is supported by the terminal lever. This pin can be adjusted from a position on the terminal shaft centerline to a location with a radius of about 15 mm (about 1/2 inch). When the pin is at the shaft center, rotation produces no vertical movement of the pin and likewise no movement of the speed-droop lever. As the pin is moved away from the shaft center, rotation produces movement of the end of the speed-droop lever, which is pivoted on thesetting speed-droop When the speed-droop moves, it produces a speed which ispin. a function of terminal shaft lever position with speed setting decreasing as fuel flow increases. This is speed droop. Speed droop is increased by moving the external lever forward, and is reduced to zero when the lever is moved back, bringing the pivot pin to the shaft center. Since there is no calibration for the droop adjustment, the zero droop position may be set only by trial and error on the engine, or by the use of a dial indicator on the speed-droop lever during manual rotation of the terminal shaft. If speed droop is not previously set, it must be set by operation on the engine, readjusting the screw on the side of the governor to obtain the desired speed change between full load and no load.

Woodward

59

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Disassembly It is not necessary to disassemble the external parts of the speed droop. If it is disassembled, mark the position of the droop bracket on the case before disassembly. Before removing the sub cap, refer to the section about the internal return spring. When the sub cap is removed, remove the speed-droop link. Pivot the terminal lever upward until slider blocks can move the droop pin from the slot in the floating lever. Notice that there are washers on both sides of the floating lever which could drop into the governor. Perform the rest of the disassembly similar to the basic governor.

 Assem  As sembl bl y  A spacer is used on the screw which attaches the droop link assembly to the speed droop shaft. When the adjustable speed droop is assembled to the lefthand side of the governor, this spacer is located on the nut side of the droop link l ink assembly, to strike the zero-droop-setting screw in the sub cap. When adjustable speed droop is assembled on the right side of the governor, the lever on the speed droop setting shaft strikes the zero-droop-setting screw, and the location of the spacer becomes unimportant.

Internal Return Return Sprin Springs gs There are two types of internal return springs. One is mounted horizontally in the sub cap, and one is mounted in a vertical position (in line with the power piston and going into the cover).

WARNING—SPRING NG DANGER  WARNING—SPRI When Whe n removing th e cover from a governor equipped w ith a vertical return spring, be careful careful of the spring c ompression. Serious personal injury is possible if the spring compression is not controlled when the scre screws ws holding the cover are removed. removed. When disassembling a sub cap with a horizontal return spring, us a small screwdriver to pry the wing on the terminal lever away from the sub cap housing. Place a 25 mm (1 inch) square of 3 mm (1/8 inch) thick metal on top of the guide rod, between the spring seat and the sub cap housing. This releases the spring force on the terminal lever. When assembling a governor with a vertical return spring, insert two Number 23 drill blanks in the governor case to guide the cover into place while the spring is being compressed (see Figure 4-3).

Temp Te mperatur erature eC Com ompensated pensated Needle Va Valve lve The optional temperature compensated needle valve uses bi-metal washers and a spring-loaded needle valve to automatically adjust the needle valve setting as a function of temperature, which is related to oil viscosity (parts 260 to 267). Adjust the valve the same as a standard valve.

CAUTION—DO NOTva CLOSE NEEDLE VALVE  0.68 N m (6 lb-in) of Do not clo se the needle valve lve to mor e than a maximum of 0.68  

torque as thi s damages the valve seat. seat. The valve valve must b e open durin g operation for the compensation system and the governor to functi on prop erly.

60

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Parts Pa rts List for Figure 6-9 6-9 Ref. Part Descr ipt ion .... ......... .......... ......... .........Q .....Quant uant ity 37017-201 Motor Assembly...................... Assembly.................................... ................ 1 37017-202 Friction cover ............. ........................... ............................ .............. 1 37017-203 Friction disc ............ .......................... ............................ ................. ... 1 37017-204 Fiber washer......................... washer....................................... ................. ... 1 37017-205 Spring washer................... washer................................. ..................... ....... 1 37017-206 Speed adjusting screw................. screw........................... .......... 1 37017-207 Set screw (6-32) ............. ........................... ....................... ......... 1 37017-208 Screw, 1-32 x 1.375........................ 1.375............................... ....... 5 37017-209 Not used 37017-210 Cover ............. ........................... ............................ .......................... ............ 1 37017-211 Gasket ............. ........................... ............................ ........................ .......... 2 37017-212 Copper washer .............. ............................ ........................ .......... 4 37017-213 Screw, 10-32 x .875........................ .875............................... ....... 4 37017-214 Lock wire .............. ............................ ........................... ................... ...... 1 37017-215 Socket cap screw screw,, 10-32 x 1. 1.000".......... 000".......... 2 37017-216 Not used 37017-217 Screw, 10-32........... 10-32......................... ............................ ................. ... 2 37017-218 Spring pad cover............ cover.......................... ........................ .......... 1 37017-219 Gasket ............. ........................... ............................ ........................ .......... 1 37017-220 Horizontal return spring ............. ......................... ............ 1 37017-221 Guide rod spring seat ............ ......................... ................ ... 1 37017-222 Sub cap ............ .......................... ............................ ....................... ......... 1 37017-223 Spring guide rod ............ .......................... ........................ .......... 1 37017-224 Plug ............. ........................... ............................ ........................... ............... 1 37017-225 Load Limit Screw ............ ......................... ....................... .......... 1 37017-226 Hex nut, .250 - 28 ............. .......................... ..................... ........ 1 37017-227 Washer ............. ........................... ............................ ....................... ......... 1 37017-227A Thread seal................ seal.............................. ............................ .............. 1 37017-228 Screw.......... Screw......................... ............................. ............................ .............. 1 37017-229 Hex nut ............. ........................... ............................ ....................... ......... 1 37017-230 Washer ............. ........................... ............................ ....................... ......... 1 37017-230A Thread seal................ seal.............................. ............................ .............. 1 37017-231 Hex nut, 8-32 ............. ........................... ............................ .............. 1 37017-232 Droop adjusting screw ............ .......................... ................ 1 37017-233 Speed droop bracket screw ............. ................... ...... 1 37017-234 Not used 37017-235 Washer ............. ........................... ............................ ....................... ......... 1 37017-236 Bracket Bracket ............. ........................... ........................... ....................... .......... 1 37017-237 Lever attachment screw............... screw......................... .......... 1 37017-238 Speed droop adjustment lever ............ ............... ... 1 37017-239 High speed st stop op screw screw,, 10-32 10-32 x 1.500... 1 37017-240 Stop nut, 10-32 .............. ............................ ........................ .......... 3 37017-241 Washer, 203 ID................. ID............................... ..................... ....... 2 37017-242 Thread seal................ seal.............................. ............................ .............. 2 37017-243 Droop adjusting bushing ............ ........................ ............ 1 37017-244 Speed adjusting shaft ............. ........................... ................ 1 37017-245 Roll pin - droop lever............... lever............................. ................ 1 37017-246 Droop adjusting shaft..................... shaft............................. ........ 1 37017-247 Torsion spring.......................... spring........................................ .............. 1 37017-248 Oil seal............. seal........................... ............................ ........................ .......... 3 37017-249 Speed adjusting bushing ............. ....................... .......... 1 37017-250 Welch plug........................ plug...................................... ..................... ....... 1 37017-251 Terminal shaft bushing ........... ........................ ............... .. 2 37017-252 Terminal shaft (left)................. (left)............................... ................ 1 37017-253 Power piston stop screw ............ ........................ ............ 1 37017-254 Terminal shaft (right)........... (right)........................ ................... ...... 1 37017-255 Relief valve sleeve..................... sleeve................................. ............ 1

Ref. Part Descripti on ... ...... ...... ...... ...... ...... ...... ..... Quantity 37017-259 Relief Valve spring .......................... .................................1 .......1 37017-260 Needle valve adjusting screw .................1 .................1 37017-261 O-ring ............. .......................... ........................... ...........................1 .............1 37017-262 Washer-spacer.................0-6 as required 37017-263 Bi-metal washer..............4-10 washer..............4-10 as required 37017-264 Needle valve .......................... ........................................ ................1 ..1 37017-265 Loading spring................. spring............................... .......................1 .........1 37017-266 Needle valve housing ........................... .............................1 ..1 37017-267 O-ring ............. .......................... ........................... ...........................1 .............1 37017-268 Plug (optional) ........................... ........................................2 .............2 37017-268A Check valve (optional)............................2 (optional)............................2 37017-269 Pipe plugs, 1/8 inch inch ............................ ................................2 ....2 37017-270 Not used 37017-271 O-ring ............. .......................... ........................... ...........................1 .............1 37017-272 Plug, .250-28.................................... .250-28..........................................1 ......1 37017-273 Case assembly.............................. assembly.......................................1 .........1 37017-274 Case to base oil-seal ring.......................1 37017-275 Idler gear stud .......................... ........................................1 ..............1 37017-276 Base.......................................................1 37017-277 Pipe plug, 1/16 1/16 inch......................... inch................................3 .......3 37017-278 Not used 37017-279 Socket hd screw, .250-20 .250-20 x 1.000 inch...3 37017-280 Nameplate..............................................1 37017-281 Drive screw .............. ............................ ............................ ................2 ..2 37017-282 Dowel pin ........................... ......................................... ....................2 ......2 37017-283 Elastic stop nut, nut, 10-32 10-32 thin.....................1 thin.....................1 37017-284 Speed droop link assembly ....................1 ....................1 37017-285 Speed droop slider bl block ock............. ........................2 ...........2 37017-286 Washer...................................................2 37017-287 Pin..........................................................1 37017-288 Sleeve ........................... ......................................... .........................1 ...........1 37017-288ASpacer.................................. Spacer................................................ ..................1 ....1 37017-289 Socket head screw, 10-32 10-32 x 1.000 1.000 inch..1 37017-290 Speed droop lever ........................... ..................................1 .......1 37017-291 Spring wire wire pin....... pin..................... ........................... ...................1 ......1 37017-292 Speed adjusting lever.............................1 lever.............................1 37017-293 Roll pin - speed adjust lever...................1 37017-294 Floating lever............................... lever..........................................1 ...........1 37017-295 Speeder spring assembly.......................1 37017-296 Pilot valve plunger plunger nut ........................... ............................1 .1 37017-297 Speeder spring seat ......................... ...............................1 ......1 37017-298 Thrust bearing ........................... ........................................1 .............1 37017-299 Flyweight....................................... Flyweight................................................2 .........2 37017-300 Needle bearing.......................................4 bearing.......................................4 37017-301 Flyweight pin ........................... ........................................ ...............2 ..2 37017-302 Ballhead ......................... ....................................... ........................1 ..........1 37017-303 Retaining ring .............. ............................ ...........................1 .............1 37017-304 Retaining ring .............. ............................ ...........................1 .............1 37017-305 Retaining ring .............. ............................ ...........................1 .............1 37017-306 Compensating bushing...........................1 bushing...........................1 37017-307 Pilot valve plunger.............. plunger ........................... ....................1 .......1 37017-308 Cotter pin............... pin............................ ........................... ....................2 ......2 37017-309 Terminal lever ........................... ........................................1 .............1 37017-310 Power piston .......................... ........................................ ................1 ..1 37017-311 Buffer spring..................................... spring...........................................2 ......2 37017-312 Buffer piston ........................... ......................................... ................1 ..1 37017-313 Buffer spring seat ........................... ...................................1 ........1

37017-256 Plug ............. ........................... ........................... .............. 1 37017-256A Washer, .703............................ x .875....................... .875............................... ......... 1 37017-257 Sleeve spring spring............. ........................... ............................ .............. 1 37017-258 Relief valve plunger ............... ............................. ................ .. 1 

37017-314 37017-315 37017-316 37017-317

Retainer ring.............................. ring................ ...........................1 .............1 Pilot valve bushing .......................... ............. ....................1 .......1 Idler gear assembly ............ ......................... ....................1 .......1 Preformed packing ........................... ................................ ..... 2 

Woodward

61

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 6-9. PSG (horizontal return spring, externally adjusted droop, torsion speed setting spring, and Bodine motor)

62

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Parts List for Figure 6-10 Ref. 37017-341 37017-342 37017-343 37017-344 37017-345 37017-346 37017-347 37017-348 37017-349 37017-350 37017-351 37017-352 37017-353 37017-354 37017-355 37017-356 37017-357 37017-358 37017-359 37017-360 37017-361

Part Descr ipt io n ..... .......... ......... ......... .........Qu ....Qu anti ty Cover gaske gasket................. t............................... ..........................2 ............2 Sub Cap...................... Cap................................... ........................... ...............2 .2 Washer, .296 OD .............. ............................ ......................2 ........2 Soc. head cap screw..... screw.................. ..........................2 .............2 Power piston strut ............. ........................... ......................1 ........1 Pivot pin ............. .......................... ........................... ........................1 ..........1 Terminal lever ............ .......................... ............................ ...............1 .1 Soc. head cap screw..... screw.................. ..........................2 .............2 Lock w washer.................. asher................................ ..........................2 ............2 Spring se seat............... at............................. ............................ .................1 ...1 Elastic stop nut, 10-32 ............. .......................... ...............1 ..1 Vertical return spring.................. spring...............................1 .............1 Cover .............. ............................ ............................ ..........................1 ............1 Thread seal..................... seal................................... ........................2 ..........2 Screw......................................................3 Washer .............. ............................ ............................ .......................1 .........1 Screw......................................................1 Washer .............. ............................ ............................ .......................1 .........1 Elastic hex nut .............. ............................ ..........................2 ............2 Screw......................................................1 Power piston .............. ............................ ............................ ...............1 .1

Woodward

63

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 6-10. PSG with Vertical Return Spring

WARNING—SPRING DANGER  WARNING—SPRING Injury may result if compressed sp ring 352 is release released d su ddenly. Use the proper equipment to remove springs and sprin g covers.

WARNING—REP WARNING—REPLA LACE CE COVER BEFORE OPERATING  Do not operate the governor governor w ith the cover removed. S Speed peed limiting stop s are removed removed with the cover and dangerous overspeeds are possible.

64

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Parts List for Figure 6-11 Ref. Part Descr ipt io n ..... .......... ......... ......... .........Qu ....Qu anti ty 37017-431 Power piston .............. ............................ ............................ ...............1 .1 37017-432 Power piston strut ............. ........................... ......................1 ........1 37017-433 Terminal lever ............ .......................... ............................ ...............1 .1 37017-434 Pivot pin ............. .......................... ........................... ........................1 ..........1 37017-435 Screw, 10-32 x .750.................... .750................................2 ............2 37017-436 Not used ............. ........................... ............................ ......................2 ........2 37017-437 Spring se seat............... at............................. ............................ .................1 ...1 37017-438 Elastic Stop Nut, 10-32 ............ ......................... ...............1 ..1 37017-439 Vertical return spring.................. spring...............................1 .............1 37017-440 Cover Gasket....................... Gasket..................................... ...................1 .....1 37017-441 Cover .............. ............................ ............................ ..........................1 ............1 37017-442 Speed Adjusting screw ............ ......................... ...............1 ..1 37017-443 Friction spring washer...................... washer.............................1 .......1 37017-444 Washer, .750 OD .............. ............................ ......................1 ........1 37017-445 Friction disc.............. disc............................ ............................ .................1 ...1 37017-446 Friction clutch............. clutch........................... ............................ ...............1 .1 37017-447 Socket hea head d set screw.................... screw............................1 ........1 37017-448 Electric motor..................... motor................................... .....................1 .......1 37017-449 Not used ............. ........................... ............................ ......................4 ........4 37017-450 Screw, 10-32 x .625.................... .625................................4 ............4 37017-451 Not used 37017-452 Screw......................................................4 37017-453 Not used 37017-454 Screw, 10-32................. 10-32............................... ..........................1 ............1 37017-455 Not used 37017-456 Not used 37017-457 Washer .............. ............................ ............................ .......................1 .........1 37017-457A Thread seal..................... seal................................... ........................1 ..........1 37017-458 Nut, 10-32 .............. ............................ ............................ ...................1 .....1 37017-459 Cap screw screw,, 10-32 10-32 x 1.500 ............. .......................1 ..........1

Woodward

65

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Figure 6-11. PSG with Vertical Return Spring and Electric Motor

WARNING—SPRI WARNING—SPRING NG DANGER  Injury may result if compressed sp ring 352 is release released d su ddenly. Use the proper equipment to remove springs and sprin g covers.

66

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Parts List for Figure 6-12 Ref. 37017-371 37017-372 37017-373 37017-374 37017-375 37017-376 37017-377 37017-378 37017-379 37017-380 37017-381 37017-382

Part Descr ipt ion .... ......... .......... ......... .........Q .....Quant uant ity Cover gasket ............. ........................... ............................ .............. 1 Sub cap ............ .......................... ............................ ....................... ......... 1 Not used Cap screw screw,, 10 10-32 -32 x 1"............. 1"........................... ................ 2 Fuel rod ............ .......................... ............................ ....................... ......... 1 Breather cap assy...................... assy.................................. ............ 1 Compression spring..................... spring............................... .......... 1 Shutdown spring seat ............ ......................... ................ ... 1 Shutdown spring ............ .......................... ........................ .......... 1 Fuel rod spring seat ............. ........................... .................. .... 1 Fuel rod gasket.......................... gasket...................................... ............ 1 Oillite bushing .............. ............................. ..........................1 ...........1 

Ref. 37017-383 37017-384 37017-385 37017-386 37017-387 37017-388 37017-389 37017-390 37017-391 37017-392 37017-393

Part Descripti on ... ...... ...... ...... ...... ...... ...... ..... Quantity Oil seal .......................... ........................................ .........................1 ...........1 Fuel rod spacer ............. ........................... .........................1 ...........1 Fuel rod gasket ........................... ......................................1 ...........1 Hex jam nut ............................ .......................................... ................1 ..1 Knob.......................................................1 Not used Cap screw ............................ .......................................... ..................2 ....2 Thread seal ............................ .......................................... ................1 ..1 Flat washer............................. washer........................................... ................1 ..1 Stop nut...................... nut................................... ........................... ...............1 .1 Stop screw .......................... ........................................ .................. .... 1 

Figure 6-12. PSG with Fuel Rod

Some PSGs are equipped with a spring-loaded fuel rod instead of a terminal shaft. The fuel rod takes the position of the guide rod on the horizontal return spring. Short terminal shafts are used in these governors with Welsh plugs installed on both sides of the governor case.

Woodward

67

 

PSG PS G Governor wit h Cast Iron Case

Parts List for Figure 6-13 Ref. 37017-471 37017-472 37017-473 37017-474 37017-475 37017-476 37017-477 37017-478 37017-479 37017-480 37017-481 37017-482 37017-483 37017-484 37017-485 37017-486 37017-487

Part Descr ipt ion .... ........ ......... .......... ......... ...... Quanti ty Hex. Screw .............. ........................... ........................... .................. .... 1 Hex nut, .250-28.....................................2 .250-28.....................................2 Washer Washer............. ........................... ........................... ........................2 ...........2 Thread seal .............. ............................ ............................ ................ .. 2 Plug, guide ............. ........................... ............................ .................. .... 1 Cover................. Cover............................... ............................ .......................1 .........1 Cap Screw, 10-32................... 10-32................................ ................ ... 5 Stop screw.............. screw............................ ............................ .................. .... 1 Gasket........................ Gasket...................................... ............................1 ..............1 Vertical return spring .............. ............................ ................ .. 1 Thin elastic hex nut ............ .......................... .................... ...... 1 spring seat..................... seat................................... .........................1 ...........1 Lever assembly ............. ........................... .........................1 ...........1 Strut pivot pin ............. ........................... ............................1 ..............1 Cap Screw, 10-32................... 10-32................................ ................ ... 2 Servo piston strut .............. ............................ ..................... ....... 1 Servo piston ............. ........................... ............................ ................ .. 1

Manual 37017 37017

68

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 6-13. Vertical Return Spring Cover and Associated Parts

Woodward

69

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Parts List for Figure 6-14 Ref. Part Descr ipt ion .... ........ ......... .......... ......... ...... Quanti ty 37017-501 Screw, 6-32 x 1.875............ 1.875......................... .................... ....... 4 37017-502 Bracket ............. ........................... ........................... ........................1 ...........1 37017-503 Motor Cover.............. Cover............................ ............................ ................ .. 1 37017-504 Foam Buffer......... Buffer....................... ............................ ..................... ....... 1 37017-505 PM Motor.............................. Motor............................................ .................. .... 1 [Items 503, 504, 505 are epoxied together as an assembly and are furnished this way only.] 37017-506 Friction Clutch ............ .......................... ............................1 ..............1 37017-507 Friction Disc.............. Disc............................ ............................ ................ .. 1 37017-508 Washer, .062 thick............... thick............................. ................... ..... 1 37017-509 Spring Washer,............... Washer,............................ ........................1 ...........1 37017-510 Speed Adjusting Screw ............ ......................... ............... 1 37017-511 Cap Screw, 10-32 x 1.5 1.5 ............ ......................... ............... 5 37017-512 Cover................. Cover............................... ............................ .......................1 .........1 37017-513 Nitrile Thread Seal.............. Seal............................ .................... ...... 1 37017-514 Washer, .032 thick............... thick............................. ................... ..... 1 37017-515 Hex Nut, .250-28 ............. ........................... .......................1 .........1 37017-516 Stop Screw, .250-28 x 3 ............. .........................1 ............1

 A friction coupling is incorporated in these cover assemblies to permit permit overtravel of the motor without damage to either the motor or the governor. This coupli coupling ng should be adjusted to slip at 0.5 to 0.6 N m (4.5 to 5.5 lb-in) of torque. The motor shaft must center in the coupling. When properly centered, the shaft will not bind 

when rotated from the highest to the lowest l owest speed.

70

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Figure 6-14. Pittman PM Speed Adjusting Motor

Woodward

71

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Chapt er 7. Chapter Serv Se rvice ice O Opti ptions ons Product Service Options The following factory options are available for servicing Woodward equipment, based on the standard Woodward Product and Service Warranty (5-01-1205) that is in effect at the time the product is purchased from Woodward or the service is performed: Replacement/Exchange (24-hour service) Flat Rate Repair Flat Rate Remanufacture • • •

If you are experiencing problems with installation or unsatisfactory performance of an installed system, the following options are available: Consult the troubleshooting guide in the manual. Contact Woodward technical assistance (see “How to Contact Woodward” later in this chapter) and discuss your problem. In most cases, your problem can be resolved over the phone. If not, you can select which course of action you wish to pursue based on the available services listed in this section. • •

Replacement/Exchange Replacement/Exchange is a premium program designed for the user who is in need of immediate service. It allows you to request and receive a like-new replacement unit in minimum time (usually within 24 hours of the request), providing a suitable unit is available at the time of the request, thereby minimizing costly downtime. This is also a flat rate structured program and includes the full standard Woodward product warranty (Woodward Product and Service Warranty 5-01-1205). This option allows you to call in the event of an unexpected outage, or in advance of a scheduled outage, to request a replacement control unit. If the unit is available at the time of the call, it can usually be shipped out within 24 hours. You replace your field control unit with the like-new replacement and return the field unit to the Woodward facility as explained below (see “Returning Equipment for Repair” later in this chapter). cha pter). Charges for the Replacement/Exchange service are based on a flat rate plus shipping expenses. You are invoiced the flat rate replacement/exchange charge plus a core charge at the time the replacement unit is shipped. If the core (field unit) is returned to Woodward within 60 days, Woodward will issue a credit for the core charge. [The core charge is the average difference between the flat rate replacement/exchange charge and the current list price of a new unit.] Return Shipment Autho rization Label. To ensure prompt receipt of the core, Return and avoid additional charges, the package must be properly marked. A return authorization label is included with every Replacement/Exchange unit that leaves Woodward. The core should be repackaged and the return authorization label affixed to the outside of the package. Without the authorization label, receipt of the returned core could be delayed and cause additional charges to be applied.

72

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Flat Rate Repair Flat Rate Repair is available for the majority of standard products in the field. This program offers you repair service for your products with the advantage of knowing in advance what the cost will be. All repair work carries the standard Woodward service warranty (Woodward Product and Service Warranty 5-01-1205) on replaced parts and labor.

Flat Rate Remanufactu Remanufactu re Flat Rate Remanufacture is very similar to the Flat Rate Repair option with the exception that the unit will be returned to you in “like-new” condition and carry with it the full standard Woodward product warranty (Woodward Product and Service Warranty 5-01-1205). This option is applicable to mechanical products only.

Return Re turn ing Equip ment for Re Repair pair If a control (or any part of an electronic control) is to be returned to Woodward for repair, please contact Woodward in advance to obtain a Return Authorization Number. When shipping the item(s), attach a tag with the following information: • • • • •

name where the controlperson; is installed; name and and location phone number of contact complete Woodward part number(s) and serial number(s); description of the problem; instructions describing the desired type of repair.

CAUTION—ELECTROSTATIC CAUTION—ELECTROSTATIC DISCHARGE To prevent damage damage to electronic compo nents caused by impro per handling, read and observe the precautions in Woodw ard manual 82715, 82715, Guide for Handling Ha ndling and Protection of Electroni Electroni c Controls, Printed Circuit Boards, and Modules.. Modules

Packing Pa cking a Contro Contro l Use the following materials when returning a complete control: protective caps on any connectors; antistatic protective bags on all electronic modules; packing materials that will not damage the surface of the unit; at least 100 mm (4 inches) of tightly packed, industry-approved packing material; a packing carton with double walls; a strong tape around the outside of the carton for increased strength. • •





• •

Woodward

73

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Return Re turn A uthor ization ization Number When returning equipment to Woodward, please telephone and ask for the Customer Service Department [1 (800) 523-2831 in North America or +1 (970) 482-5811]. They will help expedite the processing of your order through our distributors or local service facility. To expedite the repair process, contact Woodward in advance to obtain a Return Authorization Number, and arrange for issue of a purchase order for the item(s) to be repaired. No work can be started until a purchase order is received.

NOTE We highly recommend that you make arrangement arrangement in advance for return shipments. Contact a Woodward customer service representative representative at 1 (800) (800) 52 523-2 3-2831 831 in North Americ a or +1 (970) (970) 482 482-58 -5811 11 for i nst ruc tion s and for a Return Auth orization Number.

Replacement Parts When ordering replacement parts for controls, include the following information: the part number(s) (XXXX-XXXX) that is on the enclosure nameplate; the unit serial number, which is also on the nameplate. • •

How to Cont Cont act Wood Woodward ward In North America use the following address when shipping or corresponding: Woodward Governor Company PO Box 1519 1000 East Drake Rd Fort Collins CO 80522-1519, USA Telephone—+1 (970) 482-5811 (24 hours a day) Toll-free Phone (in North America)—1 (800) 523-2831 Fax—+1 (970) 498-3058 For assistance outside North America, call one of the following international Woodward facilities to obtain the address and phone number of the facility nearest your location where you will be able to get information and service. Facility Facility Brazil India Japan The Netherlands

Phone Number +55 (19) 3708 4800 +91 (129) 4097100 +81 (476) 93-4661 +31 (23) 5661111

You can also contact the Woodward Customer Service Department or consult our worldwide directory on Woodward’s website (www.woodward.com (www.woodward.com)) for the name of your nearest Woodward distributor or service facility.

74

Woodward

 

Manual 37017 37017

PSG PS G Governor wit h Cast Iron Case

Engineering Services Woodward Industrial Controls Engineering Services offers the following aftersales support for Woodward products. For these services, you can contact us by telephone, by email, or through the Woodward website. • • •

Technical Support Product Training Field Service

Contact information: Telephone—+1 (970) 482-5811 Toll-free Phone (in North America)—1 (800) 523-2831 Email—[email protected] Website— www.woodward.com  w ww.woodward.com  Te Technical chnical Suppor t  is available through our many worldwide locations or our authorized distributors, depending upon the product. This service can assist you with technical questions or problem solving during normal business hours. Emergency assistance is also available during non-business hours by phoning our toll-free number and stating the urgency of your problem. For technical support, please contact us via telephone, email us, or use our website and reference Customer Services  and then Te Services and Technical chnical Support. Support . Product Training is Training  is available at many of our worldwide locations (standard classes). We also offer customized classes, which can be tailored to your needs and can be held at one of our locations or at your site. This training, conducted by experienced personnel, will assure that you will be able to maintain system reliability and availability. For information concerning training, please contact us via telephone, email us, or use our website and reference Customer Services  Services   and then Product Training. Training . Field Service engineering Service engineering on-site support is available, depending on the product and location, from one of our many worldwide locations or from one of our authorized distributors. The field engineers are experienced both on Woodward products as well as on much of the non-Woodward equipment with which our products interface. For field service engineering assistance, please contact us via telephone, email us, or use our website and reference Customer Services  Services   and then Technical Technical Support. Support .

Woodward

75

 

PSG PS G Governor wit h Cast Iron Case

Manual 37017 37017

Technical Assistance If you need to telephone for technical assistance, you will need to provide the following information. Please write it down here before phoning:

General Your Name Site Location Phone Number Fax Number

Prime Mover Mover Inform ation Engine/Turbine Model Number Manufacturer Number of Cylinders (if applicable) Type of Fuel (gas, gaseous, steam, etc) Rating  Application  Applicatio n

Control/Gove Control/ Governor rnor Information Please list all Woodward governors, actuators, and electronic controls in your system:

Woodward Part Number and Revision Letter Control Description or Governor Type Serial Number Woodward Part Number and Revision Letter Control Description or Governor Type Serial Number Woodward Part Number and Revision Letter Control Description or Governor Type Serial Number If you have an electronic e lectronic or programmable control, please have the adjustment setting positions or the menu settings written down and with you at the time of the call.

76

 

Woodward

 

 

 

We appreciate your com ments about the content of our pub lications. Send Send comments to: icin [email protected] Please Ple ase include the manua manuall number from the front co ver of this pu blication.

PO Box 1519, Fort Collins CO 80522-1519, USA 1000 East Drake Road, Fort Collins CO 80525, USA Phone +1 (970) 482-5811  Fax +1 (970) 498-3058 •

Email Ema il and Website— Website—www www .woodward.com Woodward has co mpany-owned plants, subsidiaries, and branches, as well as authorized authorized distrib utors and other authorized service a and nd sales facilities throughout the world. Complete address / phone / fax / ema email il infor mation for all l ocations is ava available ilable on our website.

Sponsor Documents

Or use your account on DocShare.tips

Hide

Forgot your password?

Or register your new account on DocShare.tips

Hide

Lost your password? Please enter your email address. You will receive a link to create a new password.

Back to log-in

Close