Manual Woodward PGG-200 PDF
Manual Woodward PGG-200 PDF
Manual Woodward PGG-200 PDF
PG-200/PG-300
Case, Accumulator,
and Power Cylinder
Manual 36618G
! WARNING
Read this entire manual and all other publications pertaining to the work to
be performed before installing, operating, or servicing this equipment.
Practice all plant and safety instructions and precautions. Failure to follow
instructions can cause personal injury and/or property damage.
The engine, turbine, or other type of prime mover should be equipped with
an overspeed (overtemperature, or overpressure, where applicable)
shutdown device(s), that operates totally independently of the prime mover
control device(s) to protect against runaway or damage to the engine,
turbine, or other type of prime mover with possible personal injury or loss of
life should the mechanical-hydraulic governor(s) or electric control(s), the
actuator(s), fuel control(s), the driving mechanism(s), the linkage(s), or the
controlled device(s) fail.
Woodward Governor Company reserves the right to update any portion of this publication at any time. Information
provided by Woodward Governor Company is believed to be correct and reliable. However, no responsibility is
assumed by Woodward Governor Company unless otherwise expressly undertaken.
© 1977 by Woodward Governor Company
All Rights Reserved
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Contents
Woodward i
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Contents
ii Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Chapter 1
General Information
This manual only gives information pertaining to the PGA/PGG-200 and -300,
not to any of the combined PGA-EG/PGG-EG units. Refer to manual 36637 for
more information.
Description
The PG-200/PG-300 assembly is a PG type governor and an integral, hydraulic
amplifier unit. The large accumulator and oil pump supply high pressure oil
(1379 or 2482 kPa/200 or 360 psi) to the power servo. The power servo is
differential in operation, needing oil pressure to move it in either the increase-
fuel or decrease-fuel direction. To control the governor output position of the
power servo, oil flow to or from the power servo is controlled by a relay pilot
valve. The relay pilot valve consists of a pilot valve bushing and pilot valve
plunger.
A pressure reducing valve reduces the high pressure oil (1379 or 2482 kPa/200 or
360 psi) to a lower pressure (758 or 827 kPa/110 or 120 psi) for operation of the
control section of the PG governor.
In operation, a centrifugal flyweight head and pilot valve assembly senses speed
changes and controls the flow of governor oil to a relay cylinder. The relay
cylinder (a 16.3 J/12 ft-lb single-acting piston) positions the relay pilot valve to
control the power piston output position.
A short description of the setting of governor speed is given in this manual to aid
in the understanding of the basic operation.
PG-200 PG-300
accumulator pressure 1379 kPa/200 psi 2482 kPa/360 psi
output shaft diameter 1.125-48 serrated 1.500-60 serrated
Woodward 1
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Optional Accessories
The PG-200/PG-300 is designed for the PGE, PGA, PGPL, PGG, PGL, and PGD
column assemblies to meet a variety of customer requirements. Different
methods of setting speeds and optional auxiliary equipment are available on the
column assembly for use, by themselves or in combination, with the PG-200/PG-
300. The auxiliary equipment performs a secondary function such as limiting
engine load, controlling engine load to maintain constant power output for each
speed adjustment, starting fuel limiting, permitting temporary overloads, etc.
) NOTE
Some PG-200/PG-300 governors (manufactured before 1979) have a
pressurizing valve which may have been disabled. If a heat exchanger
is added to one of these governors, the pressurizing valve (Figure 6-
1, #4) should be disassembled and checked to be sure that it has not
been disabled with a cotter pin. If a cotter pin is present, it must be
removed before the pressurizing valve is replaced in the governor.
Booster Servomotor
The booster servomotor is used with the governor to help the prime mover start
quickly by moving the governor output toward the maximum fuel position at
startup. A high output booster having a 1:1 or higher pressure ratio is necessary
when used with the PG-200/PG-300 governor. A fuel limiter, an option on the
PG column assemblies, is sometimes necessary when the booster servomotor is
used.
2 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
References
This manual is one of several that must be used to describe a model of the
PG-200/PG-300 governor. For help in selecting optional features of the governor,
or if field conversion is necessary, write or call one of the Woodward offices
shown on the back of this manual.
Manual Title
25071 Oils for Hydraulic Controls
25075 Commercial Preservation Packaging for Storage of Mechanical-
Hydraulic Controls
36036 Starting Fuel Limiter for PG Governors
36052 Magnetic Speed Pickups for PG, UG8 and UG-40 Governors
36404 Analysis and Correction of PG Governing Troubles
36601 Absolute Manifold Pressure Bias Load Control and Fuel Limiter
36604 PGA Marine Governor
36614 PG Governor Dial Type Speed Setting
36615 PG Governor Lever Type Speed Setting
36621 PG Governor Speed Droop Linkage
36627 PGG Governor
36630 Basic Load Control System for PG Governors
36636 PGA58 and 200/300 Vibration Resistant Governors
36637 Integral EG Actuator for PG Governors
36640 Extensible Tailrod for PG Governors
36641 Governor Oil Heat Exchanger
36650 Solenoid Operated Shutdown Assembly
36651 Pressure Actuated Shutdown Assembly
36652 Automatic Safety Shutdowns and Alarms
36653 Pressure Actuated Shutdown for PGD and PGL Governors
36661 Manifold Gauge Pressure Fuel Limiter
36662 Torque Limit Control with Speed Droop
36684 Booster Servomotor
36685 PG Shutdown Solenoid
36686 Pneumatic Load Balance System for PGA Governors
36691 Electronic Speed Setting for PG Governors (PG-TR)
36694 PG-PL Governors
36695 Manifold Air Pressure Bias Fuel Limiter (Single Barrel Model)
Woodward 3
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
4 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Woodward 5
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
6 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Chapter 2
Installation
This chapter covers receiving, storage, and installation requirements for the
PG-200/PG-300 governor (see outline drawing, Figure 1-3).
! WARNING
The engine, turbine, or other type of prime mover should be equipped
with an overspeed (overtemperature, or overpressure, where
applicable) shutdown device(s), that operates totally independent of
the prime mover control device(s) to protect against runaway or
damage to the engine, turbine, or other type of prime mover with
possible personal injury or loss of life should the mechanical-
hydraulic governor(s) or electric control(s), the actuator(s), fuel
control(s), the driving mechanism(s), the linkage(s), or the controlled
device(s) fail.
Be careful when handling and installing the governor. Do not hit the drive shaft
or output shaft. Rough handling can cause damage to seals, parts and
adjustments.
Receiving
The PG-200/PG-300 governor is shipped from the factory in a vertical position,
bolted to a wood platform. The governor has been calibrated at the factory to
exact specifications, then drained of oil. A light film of oil covers the internal
parts to help prevent rust. Calibration or internal cleaning is not needed before
installation and operation. The drive shaft and output shafts are covered with a
light film of oil, and a soft seal preservative can be applied at the customer's
request. The seal preservative is removed before installation with a cloth and
mineral spirits.
Storage
If the PG-200/PG-300 governor is to be in storage for a period of time, see the
Woodward specification procedure, 25075, Commercial Preservation Packaging
for Storage of Mechanical-Hydraulic Controls.
Woodward 7
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Installation Requirements
See Figure 1-3 for overall dimensions, location of installation holes, hydraulic
fitting sizes, output and drive shaft dimensions, and adjustment locations.
Enough clearance must be allowed for installation, removal, and servicing of the
governor. The governor oil drain should be easily accessible.
Installation
Install the PG-200/PG-300 governor on the engine accessory drive pad. The
drive shaft must slip into the accessory drive or mating coupling without force.
Be careful not to push the drive shaft into the governor. Improper alignment or
too tight a fit between any of the parts can result in wear or seizure. It can also
cause jiggle in the governor output.
! CAUTION
Damage to the drive shaft, drive shaft seal, or other parts of the
governor may occur if the governor is dropped or set on the drive
shaft or drive coupling.
! CAUTION
Due to the location of the compensation cutoff port In the relay servo
wall, it is necessary to adjust the governor output linkage to use no
less than 5° travel between shutdown and Idle.
8 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Booster Servomotor
The booster servomotor is remotely located from the governor. Make all
hydraulic connections from the booster to the governor (see Manual 36684,
Booster Servomotor). The booster servomotor is actuated by a starting air
pressure of 1034 to 1379 kPa (150 to 200 psi), and pressure oil from the booster
moves the servo piston to the maximum fuel position. Make the starting air
connection to the booster at the optional air supply inlet (the orificed inlet). Plug
the other inlet. The governor fuel position during startup can be controlled by the
fuel limiter (if available). Because of the large volume of oil needed to move the
PG-200/PG-300 servo, the booster limit screw should be adjusted to permit
maximum booster servo output.
Heat Exchanger
The heat exchanger is remotely located from the governor. Make all hydraulic
connections for the heat exchanger to the governor (see manual 36641, Governor
Oil Heat Exchanger). If a heat exchanger is added to a governor manufactured
before 1979, the pressurizing valve (Figure 6-1, #4) should be removed and
checked to be sure that it has not been disabled with a cotter pin. If a cotter pin is
present it must be removed before the valve is replaced in the governor.
Oil Supply
Until the governor has been run and the accumulator filled, approximately four
liters/quarts of oil will fill the governor. Governor oil capacity is 7.1 liters (7.5
quarts), and it is necessary to add oil after the governor is first started in order to
restore oil to the full level mark on the dipstick. Check the oil level with the
governor running.
Woodward 9
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Governor oil lubricates and provides hydraulic power. The oil must have a
viscosity index that allows it to perform over the operating temperature range and
it must have the proper blending of additives to cause it to remain stable and
predictable over this range. Governor fluid must be compatible with seal
materials, (i.e., nitrile, polyacrylic and fluorocarbon). Many automotive and gas
engine oils, industrial lubricating oils, and other oils of mineral or synthetic
origin meet these requirements. Woodward governors are designed to give stable
operation with most oils, if the fluid viscosity at the operating temperature span is
within a 50 to 3000 SUS (Saybolt Universal Seconds) range. Ideally, at the
normal operating temperature, viscosity should be between 100 and 300 SUS.
Poor governor response or instability usually is an indication that the oil is too
thick or too thin.
Operating a governor continuously beyond the high limit temperature of the oil
will result in oil oxidation, identified by varnish or sludge deposits on the
governor parts. To reduce oil oxidation, lower the governor operating
temperature with a heat exchanger or other means, or change to an oil more
oxidation resistant at the operating temperatures.
! WARNING
A loss of stable governor control and possible Prime Mover
overspeed may result if the viscosity exceeds the 50 to 3000 SUS
range. Overspeed can damage the engine and cause personal injury
or death.
Specific oil viscosity recommendations are given in the chart. Select a readily
available good brand of oil, either mineral or synthetic, and continue using it. Do
not mix the different classes of oils. Oil that meets the API (American Petroleum
Institute) engine service classification in either the “S” group or the “C” group,
starting with “SA” and “CA” through “SF” and “CD” is suitable for governor
service. Oils meeting performance requirements of the following specifications
are also suitable: MIL-L-2104A, MILL-2104B, MIL-L-2104C, MIL-L-46152,
MIL-L-46152A, MIL-L-46152B, MIL-L-45199B.
10 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Replace the governor oil if it is contaminated, or if it is suspected of contributing
to governor instability. Drain the oil while hot and agitated; and flush the
governor with a clean solvent having some lubricity before refilling with new oil.
If drain time is insufficient for the solvent to completely drain or evaporate, flush
the governor with the same oil it is to be refilled with to avoid dilution and
possible contamination of the new oil. To avoid contamination, replacement oil
should be free of dirt, water, and other foreign material. Use clean containers to
store and transfer oil.
Oil that has been carefully selected to match the operating conditions and is
compatible with governor components should give long service between oil
changes. Under ideal conditions (minimum exposure to dust and water and
within the temperature limits of the oil), changes can be extended. A regularly
scheduled oil analysis is helpful in determining the frequency of oil changes.
Woodward 11
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
12 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Chapter 3
Operation and Adjustment
This section describes the first startup and the basic adjustments of the
PG-200/PG-300 assembly.
Initial Operation
Before the first startup of the PG-200/PG-300, be sure that all steps in Chapter 2
have been done and are correct.
! WARNING
TO PROTECT AGAINST POSSIBLE PERSONAL INJURY, LOSS OF
LIFE and/or PROPERTY DAMAGE WHEN STARTING the engine,
turbine or other type of prime mover, BE PREPARED TO INITIATE AN
EMERGENCY SHUTDOWN to protect against runaway or overspeed
should the mechanical-hydraulic governor(s) or electric control(s),
the actuator(s), fuel control(s), the driving mechanism(s), the
linkage(s), or the controlled devices fail.
Adjustments
Normally, the only requirements for putting a new or repaired and calibrated
governor into service are filling the governor with oil and adjusting the
compensation needle valve to get maximum stability. All other operating
adjustments are made during factory calibration to manufacturer's specifications.
Further adjustment should not be needed. Do not make an internal adjustment of
the governor unless completely familiar with the correct procedure.
Woodward 13
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
To Adjust The Needle Valve:
1 With the prime mover operating at IDLE speed, open the compensation
needle valve until the governor begins to hunt. Let the governor hunt several
minutes to remove trapped air in the hydraulic circuits.
) NOTE
It may be necessary to upset the governor speed momentarily to
cause the governor to hunt.
2. Close the compensation needle valve slowly until hunting just stops. Keep
the needle valve open as far as possible to prevent slow governor response.
The needle valve setting can be from 1/16 to 2 turns open. Do not close the
needle valve tight. The governor cannot operate correctly in this condition.
Pressure
Oil pump pressure in the PG-200 model should exceed 1379 kPa (200 psi) at
operating speed. Pressure in the PG-300 model should exceed 2068 (300 psi) at
operating speed. To check the internal pressure, attach a pressure gauge in the
.562-18 straight-thread port indicated as oil from booster outlet number 1 in
Figure 1-3 of this manual.
14 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Chapter 4
Principles of Operation
Introduction
This chapter describes the operation of the basic elements of the PG-200/PG-300
case, accumulator, and power cylinder assembly. A schematic drawing (Figure 4-
1) shows the working relationship of the various parts. The speed setting is in the
column assembly of the PG-200/PG-300 governor, and only a short description is
given to aid in understanding the basic operation.
Amplifier Section
Four check valves, two on the suction and two on the discharge side of the pump,
permit the drive shaft to rotate in either direction without changing the PG-
200/PG-300 operation. If the pump gears were rotated in the opposite direction,
the open check valves would close and the closed check valves would open.
Oil on the discharge side of the pump pushes the accumulator piston against the
accumulator spring. When piston movement uncovers the bypass port, excess
pressure oil from the pump is returned to the sump through the pressurizing valve
or heat exchanger. The accumulator is a reservoir for pressure oil and operates as
a relief valve to limit maximum pressure in this part of the hydraulic circuit.
Pressure is held at a minimum of 1379 kPa (200 psi) in the PG-200, and 2482
kPa (360 psi) in the PG-300.
When the PG-200/PG-300 is used with the optional heat exchanger, oil flows
through the heat exchanger from the accumulator bypass. If the oil flow through
the exchanger becomes restricted, and the pressure reaches 172 kPa (25 psi), the
pressurizing valve opens and directs bypass oil back to sump.
Woodward 15
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Power Servo
The relay pilot valve controls the flow of 1379 or 2482 kPa (200 or 360 psi) oil
to the power servo assembly. The power piston, working through connecting
linkage, controls the engine or turbine.
The power piston operates as a differential type, requiring pressure oil to move in
either increase fuel or decrease fuel direction. The differential piston has pressure
oil continually directed to the small area side. The constant pressure tries to move
the piston in the decrease fuel direction, but the piston cannot move to decrease
fuel until oil in the passages between the relay piston and the large area side of
the servo piston is released to sump. Oil is connected to the sump only when the
relay pilot valve plunger is below its centered position.
If the relay pilot valve plunger is above the centered position, oil flows to the
control (large area) side of the servo piston. The force that results from oil
pushing on the large surface area which is greater than the constant force on the
loading (small area) side, moves the piston in the increase fuel direction.
) NOTE
The power piston can move only when the relay pilot valve is
uncentered and permits oil to flow.
Governor Section
The governing section of the PG-200/PG-300 has a pressure reducing valve, a
ballhead, pilot valve plunger, rotating bushing, a compensating system, and a
relay servo.
16 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Woodward 17
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Governing Section
The upper end of the rotating bushing holds the ballhead assembly, giving a
direct drive from the prime mover to the flyweights. The thrust bearing on top of
the flyweight toes permits the pilot valve plunger to remain stationary while the
bushing rotates. This reduces friction between the bushing and plunger.
A spring driven, oil dampened ballhead can be used to filter objectionable input
torsionals which could be transferred to the governor control output. These
ballheads are more completely described in the Woodward Service Bulletin
50001.
As the ballhead rotates, centrifugal force developed by the flyweights tries to lift
the pilot valve plunger and is opposed by the force of the speeder spring pushing
down. The greater of the two forces moves the pilot valve plunger.
When the prime mover is on speed at any speed setting, these forces are equal
and the flyweights are in a vertical position. In this position the control land on
the pilot valve plunger is centered over the control port in the rotating bushing.
No oil, other than normal leakage, flows to or from the buffer compensation
system or the relay servo.
A change in either of these two forces moves the plunger from its centered
position. The plunger is lowered (1) when the governor speed setting is
unchanged but additional load slows the prime mover and governor (decreasing
flyweight centrifugal force), or (2) when prime mover speed is not changed but
speeder spring force is increased to raise the governor speed setting. In a similar
way, the pilot valve plunger is raised (1) when governor speed setting is not
changed but load is removed from the prime mover causing an increase in speed
(hence an increase in flyweight centrifugal force), or (2) where prime mover
speed is not changed but speeder spring force is reduced to lower the governor
speed setting.
When there is an underspeed condition, the plunger is lowered and pressure oil is
directed into the buffer and compensation system and relay servo to raise the
relay pilot valve plunger and cause the power piston to move to increase fuel. In
an overspeed condition, the plunger is lifted permitting oil to drain from these
areas to the sump. A return spring moves the relay piston to decrease and also
lowers the relay pilot valve plunger, releasing oil from the left side of the power
servo, allowing movement toward decrease fuel.
With the governor acting directly on the fuel setting but sensing only actual
engine or turbine speed, extensive overspeed or underspeed would occur at each
speed change were it not for the buffer compensation system. The buffer piston,
springs, and needle valve in the hydraulic circuit between the pilot valve plunger
and the relay servo make up the system.
18 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
When the flyweights move the pilot valve off the centered position, oil flow to or
from the small power piston causes a pressure differential across the buffer piston
and needle valve.
The restriction of flow through the needle valve causes oil to flow through the
path that houses the buffer piston and springs and causes the buffer piston to
move against the buffer spring on the low pressure side of the piston. The amount
of pressure differential across this system is controlled by the combination of
needle valve opening and buffer spring scale.
This pressure differential is sensed by the compensation land on the pilot valve,
applying a force tending to oppose the change in force of the flyweights and
move the pilot valve back to the centered position before the set speed is reached.
This negative feedback (droop) reduces overshoot of the set speed and increases
the stability of the control loop. The pressure differential gradually equalizes
through the needle valve and the negative feedback dissipates, returning speed to
the set point.
The rate at which this happens is controlled by the needle valve opening and by
buffer spring scale. Stronger buffer springs increase the effect, or gain, of the
compensation, and the needle valve opening determines the recovery time. The
smaller the opening, the slower the recovery to set speed. The buffer spring scale
is predetermined and specified by the prime mover manufacturer or by
Woodward.
PG-200/PG-300
The following two examples show the sequence of events during a speed setting
change or load change. The sequence occurs within the governor almost
simultaneously rather than the step-by-step method described.
As the prime mover accelerates to the set speed, the compensation force
gradually reduces to offset the increasing flyweight force. This is done each time
by balancing the pressures on both sides of the compensation land through the
needle valve. This reduces overshoot to quickly establish stable, on-speed
operation.
Woodward 19
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
When large changes in speed setting or load are made, the buffer piston moves
far enough to open a bypass port in the buffer cylinder. This permits oil to flow
directly to the relay servo and lets the governor respond quickly to large changes
in speed setting or load.
Compensation Cutoff
With large decreases in speed setting or large load decreases, the small power
piston moves to the minimum fuel position and covers the compensation oil
passage between the small servo and the needle valve to prevent normal
balancing of the compensation pressures. This holds the buffer piston to the left
of center and increases the level of the pressure sent to the upper side of the
compensation land.
20 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Chapter 5
Maintenance
Governor Oil
Use NEW OIL to fill the governor. Be sure that all containers used for governor
oil storage are clean. Contaminated governor oil will cause early wear of
plungers, bushings, gears, bearings, etc., and can cause rust and corrosion on
springs and other internal parts.
Under normal operating conditions, oil should be changed every 12 months. Oil
must be changed more often if the unit operates under unusual temperature or dirt
conditions.
After the governor is put in service, the oil condition should be carefully
monitored until a length of service can be established. A careful check of oil
condition is suggested at least every three months until length of service is
established. Any time the oil looks dirty or appears to be breaking down from
contamination or high temperature, drain the governor oil while it is hot, flush
with the lightest grade of the same oil, and refill the governor with new oil of the
correct viscosity. (See oil viscosity table, Figure 2-1, or refer to Woodward
manual 25071A, Recommended Oils for Governors, Actuators.)
Troubleshooting
While a governor problem can show up as speed variations of the prime mover,
not all speed variations of the prime mover are caused by a malfunction of the
governor. When there is a problem, follow these procedures:
1. Check that the load is not beyond the load limit of the prime mover.
2. Be sure the engine cylinders are firing and the fuel injectors are operating
and correctly calibrated.
3. Check the linkage from the governor output to the fuel control. There must
be no binding and a minimum amount of backlash.
7. Check governor oil pressure at the booster outlet port on the PG-200/
PG-300 case. Pressure in the PG-200 should be 1379 kPa (200 psi). Pressure
in the PG-300 should be 2482 kPa (360 psi). Check at operating temperature
and speed.
Woodward 21
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
8. Check the governor oil and replace it if it is dirty. Sometimes the
malfunction of the governor can be corrected by flushing the governor with
fuel oil or kerosene while the governor is operated through a cycle.
9. Check the drive to the governor for any evidence of the governor not being
aligned correctly on the installation pad, rough gears, or backlash.
If disassembly and repair become necessary, the work must be done by personnel
trained in the correct repair procedures.
! WARNING
The accumulator spring (#205 in Figures 6-5 and 6-6) is compressed
and held in the accumulator assembly. In old style accumulators
(Figure 6-5), careless disassembly of the unit can result in injury to
person or damage to equipment. Place the accumulator assembly in
an arbor press to permit a controlled rate of spring expansion. This
does not apply to the newer-style accumulator (Figure 6-6). If in doubt
over which type you have, please check the actual build with the
versions depicted in Figures 6-5 and 6-6.
22 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Chapter 6
Parts Information
3. Part reference number as given in the part list, name of part, or description
of part.
Woodward 23
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Figure 6-1. Parts for PG-200 Case, Accumulator, and Power Cylinder
24 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Parts List for Figure 6-2
Ref. No. Part Name ...................................................................................... Qty
36618-75 Screw - .250-28 x .500 ........................................................................ 2
36618-76 Washer - .250 ..................................................................................... 2
36618-77 Washer- .750 O.D. x .266 I.D.............................................................. 2
36618-78 Spring cover........................................................................................ 1
36618-79 Preformed packing 1.239 I.D. x .070................................................... 1
36618-80 Loading spring .................................................................................... 1
36618-81 Spring seat.......................................................................................... 1
36618-82 Pilot valve sleeve ................................................................................ 1
36618-83 Pilot valve spring seat ......................................................................... 1
36618-84 Pilot valve plunger adjuster ................................................................. 1
36618-85 Pilot valve lever assembly................................................................... 1
36618-86 Cotter pin .062 dia. x .375 ................................................................... 2
36618-87 Pin - .1862 dia. x .900 ......................................................................... 1
36618-88 Pin - .1871 dia. x .531 ......................................................................... 1
36618-89 Power piston assembly ....................................................................... 1
36618-90 Tail rod lift nut ..................................................................................... 1
36618-91 Washer................................................................................................ 1
36618-92 Not used
36618-93 Pilot valve spring................................................................................. 1
36618-94 Pilot valve plunger assembly............................................................... 1
Figure 6-2. Parts for Power Piston Assembly and Pilot Valve Assembly
Woodward 25
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Parts List for Figure 6-3
Ref. No. Part Name...................................................................................... Qty
36618-100 Oil seal 1.125 x 1.562 ......................................................................... 2
36618-101 Bearing ............................................................................................... 2
36618-102 Gasket ................................................................................................ 1
36618-103 Screw - .500-13 x 2.500...................................................................... 2
36618-104 Washer - .500 ..................................................................................... 6
36618-105 Output lever ........................................................................................ 1
36618-106 Output shaft ........................................................................................ 1
36618-107 Cover .................................................................................................. 1
36618-108 Screw - .312-18 x 1.500...................................................................... 1
36618-109 Washer-.312 I.D. ................................................................................ 1
36618-110 Drive screw......................................................................................... 2
36618-111 Scale .................................................................................................. 1
36618-112 Indicator.............................................................................................. 1
36618-113 Screw - .500-13 x 1.250...................................................................... 4
36618-114 Retaining ring .971 ............................................................................. 2
36618-115 Pin - 3.750 x .874 ............................................................................... 1
36618-116 Retaining ring -.971 ............................................................................ 1
36618-117 Plug .................................................................................................... 1
36618-118 Preformed packing .614 I.D. x .070 .................................................... 1
36618-119 Retaining ring - .620 ........................................................................... 2
36618-120 Spring seat ......................................................................................... 1
36618-121 Spring ................................................................................................. 1
36618-122 Retaining ring-.207 ............................................................................. 1
36618-123 Reducing valve plunger ...................................................................... 1
36618-124 Reducing valve sleeve........................................................................ 1
36618-125 Washer, flat ........................................................................................ 6
Figure 6-3. Parts for Output Assembly and Reducing Valve Assembly
26 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Parts List for Figure 6-4
Ref. No. Part Name ...................................................................................... Qty
36618-175 Preformed packing .............................................................................. 4
36618-176 Check valve assembly ........................................................................ 4
36618-177 Retaining ring - 1.526.......................................................................... 4
36618-178 Pin - 3.188 x .875................................................................................ 1
36618-179 Gasket ................................................................................................ 1
36618-180 Washer .500........................................................................................ 7
36618-181 Screw - .500-13 x 2.000 ...................................................................... 7
36618-182 Servo cover......................................................................................... 1
36618-183 Servo piston ........................................................................................ 1
36618-184 Connecting rod.................................................................................... 1
36618-185 Retaining ring 1.804 ............................................................................ 1
36618-186 Buffer plug........................................................................................... 1
36618-187 Preformed packing 1.296 x .139 ......................................................... 1
36618-188 Buffer spring........................................................................................ 2
36618-189 Buffer piston........................................................................................ 1
36618-190 Buffer spring seat................................................................................ 1
36618-191 Retaining ring...................................................................................... 2
Woodward 27
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Parts List for Figure 6-5
Ref. No. Part Name...................................................................................... Qty
36618-201 Preformed packing 1.114 I.D. x .070 .................................................. 2
36618-202 Accumulator plate............................................................................... 1
36618-203 Stud - 13.000 x .500 ........................................................................... 2
36618-204 Accumulator cylinder .......................................................................... 1
36618-205 Accumulator spring............................................................................. 1
36618-206 Accumulator tube................................................................................ 1
36618-207 Preformed packing ............................................................................. 2
36618-208 Accumulator end................................................................................. 1
36618-209 Washer - .500 ..................................................................................... 4
36618-210 Nut...................................................................................................... 4
36618-211 Plug - .750 .......................................................................................... 1
36618-212 Warning plate ..................................................................................... 1
36618-213 Drive screw - #2 x .125 ....................................................................... 2
36618-214 Plug - .562-18 UNF 2A ....................................................................... 1
36618-215 Preformed packing .468 x .074........................................................... 1
36618-216 Stud - 14.000 x .500 ........................................................................... 2
28 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Parts List for Figure 6-6
Ref. No. Part Name ...................................................................................... Qty
36618-201 Preformed packing .............................................................................. 2
36618-204 Accumulator cylinder........................................................................... 1
36618-205 Accumulator spring ............................................................................. 1
36618-207 Preformed packing .............................................................................. 1
36618-211 Plug..................................................................................................... 1
36618-211A Preformed packing .............................................................................. 1
36618-214 Plug..................................................................................................... 1
36618-215 Preformed packing .............................................................................. 1
36618-226 Accumulator plate ............................................................................... 1
36618-227 Flat washer ......................................................................................... 3
36618-228 Bolt, .500-13 x 8.8 inches.................................................................... 3
36618-229 Soc. hd. screw, .500-13 x 1.750.......................................................... 2
36618-230 Accumulator housing........................................................................... 1
Figure 6-6. Parts for Vibration Resistant Accumulator Assembly (new style)
Woodward 29
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Parts List for Figure 6-7
Ref. No. Part Name...................................................................................... Qty
36618-301 Key, PG200 pump .............................................................................. 1
36618-302 Pilot, base........................................................................................... 1
36618-303 Washer, thrust (1.000 x 1.562) ........................................................... 1
36618-304 Washer, thrust (1.000 x 1.750) ........................................................... 1
36618-305 Bearing, thrust, needle........................................................................ 2
36618-306 Oil Seal ............................................................................................... 1
36618-307 Shaft, PG200 drive, serrated .............................................................. 1
36618-308 Washer, flat ........................................................................................ 1
36618-309 Ring, external retaining....................................................................... 1
36618-310 Coupling, 3199 PG drive..................................................................... 1
36618-311 Ring, internal retaining........................................................................ 1
36618-312 O-ring, Viton ....................................................................................... 1
36618-313 Pump, Gerotor .................................................................................... 1
36618-314 Screw, socket head cap...................................................................... 4
36618-315 Shaft, PG200 drive, keyed.................................................................. 1
36618-316 Spacer ................................................................................................ 1
36618-317 Sleeve, shipping (not shown).............................................................. 1
36618-318 Nut, .625-18 castellated...................................................................... 1
36618-319 Key ..................................................................................................... 1
36618-320 Cotter pin ............................................................................................ 1
36618-321 Bearing, needle .................................................................................. 2
36618-322 Coupling drive..................................................................................... 1
30 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Woodward 31
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
32 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Chapter 7
Service Options
Replacement/Exchange
Replacement/Exchange is a premium program designed for the user who is in
need of immediate service. It allows the user 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, pursuant to Woodward’s
Product and Service Warranty (25222).
Charges for the Replacement/Exchange service are based on a flat rate plus
shipping expenses. The customer is 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.]
Woodward 33
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Return Shipment Authorization Label. To ensure prompt receipt of the core,
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.
) NOTE
We highly recommend you make arrangement in advance for return
shipments. Contact a Woodward customer service representative at
(1)(800) 835-5182 in North America or (1)(970) 498-5811 for
instructions and for a Return Authorization Number.
34 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
Replacement Parts Information
When ordering replacement parts for electronic controls, include the following
information:
• the part number(s) (XXXX-XXX) that is on the enclosure nameplate;
• the unit serial number, which is also on the nameplate.
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 receive information and service.
Woodward 35
PG-200/-300 Case, Accumulator, and Power Cylinder Manual 36618
Additional Aftermarket Product Support Services
Woodward Aftermarket Services offers the following after-sale support for all
Woodward products:
• Customer Training
• Technical Assistance
• Field Service
• Specialized Services
Field Service engineers are dispatched from the Woodward facility in Colorado,
or from one of many regional or worldwide offices located near the customer to
provide prompt response. Woodward field engineers are experienced and are
continually updated on all Woodward products as well as much of the non-
Woodward equipment they interface with. The field engineers ensure that all
documentation is updated, and all field engineers are well informed as to new
problems which might arise. Woodward field service engineers are on-call 24
hours a day. Call the number above and ask for field service.
Specialized Services can be tailored to the specific needs of the customer. These
services can be based on a particular aspect of a single service or a combination
of services and are covered under one low-cost service contract. A contract may
be for regularly scheduled training courses or possibly to have a field engineer
visit the customer site at pre-determined intervals to provide a system analysis,
verify proper operation, and make recommendations for maintenance
improvements, enhancements, or other needs. These contracts are usually
custom-designed and structured to allow ultimate flexibility, thereby allowing the
customer to plan and budget more accurately. For more details, contact the
Woodward sales representative, or call the number above and ask for sales
support to discuss specific needs.
36 Woodward
Manual 36618 PG-200/-300 Case, Accumulator, and Power Cylinder
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
Governor Information
Please list all Woodward governors, actuators, and electronic controls in your system:
Serial Number
Serial Number
Serial Number
If you have an electronic or programmable control, please have the adjustment setting positions or
the menu settings written down and with you at the time of the call.
Woodward 37
We appreciate your comments about the content of our publications.
Send comments to: icinfo@woodward.com
Please include the manual number from the front cover of this publication.
04/10/F