Woodward EGB-10 User manual

Product Manual 37729
(Revision B)
Original Instructions
Two-Solenoid Speed Setting Mechanism
for EGB-10 Governor/Actuator
Operation Manual

General
Precautions
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.
Revisions
This publication may have been revised or updated since this copy was produced.
To verify that you have the latest revision, check manual 26311 , Revision Status &
Distribution Restrictions of Woodward Technical Publications, on the publications
page of the Woodward website:
www.woodward.com/publications
The latest version of most publications is available on the publications page. If
your publication is not there, please contact your customer service representative
to get the latest copy.
Proper Use
Any unauthorized modifications to or use of this equipment outside its specified
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 "misuse" 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.
Translated
Publications
If the cover of this publication states "Translation of the Original Instructions"
please note:
The original source of this publication may have been updated since this
translation was made. Be sure to check manual 26311 , Revision Status &
Distribution Restrictions of Woodward Technical Publications, to verify whether
this translation is up to date. Out-of-date translations are marked with . Always
compare with the original for technical specifications and for proper and safe
installation and operation procedures.
Woodward reserves the right to update any portion of this publication at any time. Information provided by Woodward is
believed to be correct and reliable. However, no responsibility is assumed by Woodward unless otherwise expressly
undertaken. Copyright © Woodward 1972
All Rights Reserved

Manual 37729 EGB-10 Two-Solenoid Speed Setting Mechanism
Woodward 1
Warnings and Notices
Important Definitions
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.
DANGER—Indicates a hazardous situation which, if not avoided, will result
in death or serious injury.
WARNING—Indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION—Indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury.
NOTICE—Indicates a hazard that could result in property damage only
(including damage to the control).
IMPORTANT—Designates an operating tip or maintenance suggestion.
Overspeed /
Overtemperature /
Overpressure
The engine, turbine, or other type of prime mover should be
equipped with an overspeed shutdown device to protect against
runaway or damage to the prime mover with possible personal injury,
loss of life, or property damage.
The overspeed shutdown device must be totally independent of the
prime mover control system. An overtemperature or overpressure
shutdown device may also be needed for safety, as appropriate.
Personal Protective
Equipment
The products described in this publication may present risks that
could lead to personal injury, loss of life, or property damage. Always
wear the appropriate personal protective equipment (PPE) for the job
at hand. Equipment that should be considered includes but is not
limited to:
Eye Protection
Hearing Protection
Hard Hat
Gloves
Safety Boots
Respirator
Always read the proper Material Safety Data Sheet (MSDS) for any
working fluid(s) and comply with recommended safety equipment.
Start-up
Be prepared to make an emergency shutdown when starting the
engine, turbine, or other type of prime mover, to protect against
runaway or overspeed with possible personal injury, loss of life, or
property damage.
Automotive
Applications
On- and off-highway Mobile Applications: Unless Woodward's control
functions as the supervisory control, customer should install a
system totally independent of the prime mover control system that
monitors for supervisory control of engine (and takes appropriate
action if supervisory control is lost) to protect against loss of engine
control with possible personal injury, loss of life, or property damage.

EGB-10 Two-Solenoid Speed Setting Mechanism Manual 37729
2 Woodward
Battery Charging
Device
To prevent damage to a control system that uses an alternator or
battery-charging device, make sure the charging device is turned off
before disconnecting the battery from the system.
Electrostatic Discharge Awareness
Electrostatic
Precautions
Electronic controls contain static-sensitive parts. 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 control).
Avoid all plastic, vinyl, and Styrofoam (except antistatic versions)
around printed circuit boards.
Do not touch the components or conductors on a printed circuit
board with your hands or with conductive devices.
To prevent damage to electronic components caused by improper
handling, read and observe the precautions in Woodward manual
82715, Guide for Handling and Protection of Electronic Controls,
Printed Circuit Boards, and Modules.
Follow these precautions when working with or near the control.
1. Avoid the build-up of static electricity on your body by not wearing clothing
made of synthetic materials. Wear cotton or cotton-blend materials as much
as possible because these do not store static electric charges as much as
synthetics.
2. Do not remove the printed circuit board (PCB) from the control cabinet
unless absolutely necessary. If you must remove the PCB from the control
cabinet, follow these precautions:
Do not touch any part of the PCB except the edges.
Do not touch the electrical conductors, the connectors, or the
components with conductive devices or with your hands.
When replacing a PCB, keep the new PCB in the plastic antistatic
protective bag it comes in until you are ready to install it. Immediately
after removing the old PCB from the control cabinet, place it in the
antistatic protective bag.

Manual 37729 EGB-10 Two-Solenoid Speed Setting Mechanism
Woodward 3
Two-Solenoid Speed Setting Mechanism
for EGB-10 Governor/Actuator
Description
(Figure 1)
This manual should be used with either manual 37708 or 82340, which covers
the EGB-10 governor/actuator. In addition, you should be familiar with the
operation of the three sections within the governor/actuator (electric actuator,
mechanical governor, and hydraulic amplifier).
The two-solenoid speed setting mechanism, an optional feature used on the
EGB-10 governor/actuator, permits remote control of the mechanical governor.
The mechanical governor controls the prime mover when starting and when the
signal to the electric actuator fails. The mechanism replaces the standard front
panel and dials (speed setting, speed droop, and load limit) used to control the
mechanical governor. It consists of a speed setting cylinder, speed screw, speed
droop bracket, and load limit screw. The speed setting cylinder contains solenoid
operated idle and maximum speed pistons, which permit a selection of idle or
maximum speed.
Figure 1. Two-Solenoid Speed Setting Mechanism

EGB-10 Two-Solenoid Speed Setting Mechanism Manual 37729
4 Woodward
Operation
(Figure 2)
Idle Speed
When solenoid A is energized, its plunger is seated and subgovernor pressure oil
forces the seal piston up. The seal piston raises the seal spring, idle speed
piston, idle speed screw, maximum speed piston, and the piston link. Upward
movement of the idle speed screw and attached linkage stops when the idle
speed piston contacts the retaining ring. Upward movement of the seal piston
stops when it compresses the O-ring, thus preventing oil leakage between the
idle speed piston and maximum speed piston areas. The piston link raises the
left end of the speed lever. The right end of the speed lever moves down,
increasing speeder spring compression. The speeder spring moves the pilot
valve plunger down from its centered position. Pressure oil is directed to the
buffer piston and moves it to the right. Oil displaced by the buffer piston forces
the power piston up which, in turn, moves the loading piston up. When the piston
moves up, the hydraulic amplifier section rotates the output shaft in the increase
fuel direction, and idle speed is reached.
Maximum Speed
Both solenoids must be energized to attain maximum speed. Subgovernor
pressure oil flows to the rotating pilot valve bushing. With each rotation of the
bushing, a slot in the bushing registers with the pressure oil supply and the
supply passage to the maximum speed piston area. Intermittent pressure oil is
thus passed to the area. When solenoid B is energized, its plunger is seated and
intermittent pressure oil forces the maximum speed piston up. Intermittent
pressure oil controls the rate at which the piston moves, and hence prime mover
acceleration is also controlled. Typically, 15 seconds is required to move the
piston up. As the maximum speed piston moves up, it raises the piston link and
the left end of the speed lever. As the right end of the speed lever moves down,
speeder spring compression increases and the output shaft rotates to the
maximum fuel position. Upward movement of the maximum speed piston stops
when it contacts the maximum speed screw. The manual speed screw may be
turned clockwise to lower the left end of the speed lever and hence reduce prime
mover speed.
Shutdown
When solenoid B is de-energized, its plunger moves off its seat. Intermittent
pressure oil and oil under the maximum speed piston flow to sump. The loading
spring lowers the left end of the speed lever, piston link, and maximum speed
piston. As the right end of the speed lever moves up, speeder spring
compression decreases and the output shaft rotates in the decrease fuel
direction. Downward movement of the maximum speed piston stops when the
idle speed screw contacts the idle speed piston. The prime mover is at idle under
this condition.

Manual 37729 EGB-10 Two-Solenoid Speed Setting Mechanism
Woodward 5
Figure 2. Schematic Diagram, Two-Solenoid Speed Setting Mechanism

EGB-10 Two-Solenoid Speed Setting Mechanism Manual 37729
6 Woodward
When solenoid A is de-energized, its plunger moves off its seat. Subgovernor
pressure oil and oil under the seal piston flow to sump. The seal spring forces the
seal piston down, breaking the seal established by the 0-ring and seal piston.
The loading spring lowers the left end of this speed lever, attached linkage, idle
speed screw, idle speed piston, seal spring, and seal piston. As the right end of
the speed lever moves up, speeder spring compression decreases and the
output shaft rotates to the fuel off position.
Adjustments
(Figure 1)
Table 1 describes the function and adjustment procedures for the two-solenoid
speed setting adjustment components. See manual 37708 or 82340 for complete
adjustment information on the EGB-10 governor/actuator.
Be prepared to make an emergency shutdown when starting the
engine, turbine, or other type of prime mover, to protect against
runaway or overspeed with possible personal injury, loss of life, or
property damage.
Table 1. Adjustments
Component Function
A
djustment
Maximum
Speed Screw Sets the speed at which the centrifugal governor assumes control. This speed must be higher (3–5%)
than that for which the electric governor is set.
Remove front cover. Loosen lock nut.
Turn screw clockwise to decrease
maximum speed, counterclockwise to
increase. Tighten lock nut and
reinstall front cover.
Manual Speed
Screw Permits manual speed setting when centrifugal governor is controlling and both solenoids are
energized.
(1) Loosen lock nut. Turn screw
clockwise to reduce speed. Tighten
lock nut.
(2) When electric governor is
controlling, turn screw counter-
clockwise until it clears the speed
lever.
Idle Speed
Screw Sets idle speed when centrifugal governor is controlling. Remove front cover. Turn screw clockwise to increase idle speed,
counterclockwise to decrease.
Reinstall front cover.
Speed Droop
Bracket Sets the percent of droop when centrifugal governor is controlling. Remove top cover. Loosen lock screw. Slide bracket forward to
increase droop. Tighten lock screw
and reinstall top cover.
Load Limit
Screw Sets maximum output shaft travel when either centrifugal or electric governor is controlling, Loosen lock nut. Turn screw clockwise to decrease output shaft
travel; counterclockwise to increase.

Manual 37729 EGB-10 Two-Solenoid Speed Setting Mechanism
Woodward 7
Parts Information
When ordering parts, supply the following information:
Actuator serial number shown on nameplate
Manual number (this is manual 37729)
Figure number, reference number, and the part name given in the parts list
The quantity desired

EGB-10 Two-Solenoid Speed Setting Mechanism Manual 37729
8 Woodward
Parts List for Figure 3
Ref. No. Part Name.....................................................Quantity
37729-1 Screw, fil. hd., 1/4-28 x 5/8 (MS35266-80) ................ 6
37729-2 Washer, lock, 1/4 (MS35338-44)............................... 6
37729-3 Top cover .................................................................. 1
37729-4 Cover gasket ............................................................. 1
37729-5 Screw, soc. hd., 1/4-28 x 3........................................ 6
37729-6 Washer, lock, 1/4 (MS518481 ................................... 6
37729-7 Front cover ................................................................ 1
37729-8 Cover gasket ............................................................. 1
37729-9 Nut, hex, 5/16-24 (MS35690-522)............................. 1
37729-10 Speed adjusting screw (manual) ............................... 1
37729-11 Nut, hex., 3/4-16 (MS35691-1224)............................ 1
37729-12 Washer, lock, int. tooth, 3/4 (MS35333-47)............... 1
37729-13 Sleeve ....................................................................... 1
37729-14 Shutdown spring........................................................ 1
37729-15 Washer, plain, 0.198 ID x 0.340 OD x 0.031............. 1
37729-16 Screw, soc. hd., 1/4-28 x 3/4 (MS16998-43) ............. 2
37729-17 Washer, lock, 1/4 (MS35338-44)............................... 2
37729-18 Preformed packing, 0.441 OD (NAS1593-011) ......... 1
37729-19 Preformed packing, 0.316 OD (NAS1593-008) ......... 1
37729-20 Speed setting cylinder (see Fig. 4)............................ 1
37729-21 Loading spring (load limit lever)................................. 1
37729-22 Nut, hex., 1/4-28........................................................ 1
37729-23 Screw, hex. hd., drilled, full thd., 1/4-28x 1-1/4.......... 1
37729-24 Washer, copper, 1/4 ID x 1/2 OD x 1/32.................... 1
37729-25 Cotter pin, 1/32 x 3/8 (MS24665-3) ........................... 2
37729-26 Straight pin, drilled..................................................... 1
37729-27 Cotter pin, 3/32 x 5/8 (MS24685-299) ....................... 1
37729-28 Speed setting shaft.................................................... 1
37729-29 Spring........................................................................ 1
37729-30 Speed adjusting lever................................................ 1
37729-31 Spacer....................................................................... 1
37729-32 Floating lever............................................................. 2
37729-33 Screw, hex. hd., 10-32 x 1/2 (M59518-061................ 1
37729-34 Washer, lock, #10 (MS35338-43).............................. 1
37729-35 Washer, plain, #10 (AN960-10)................................. 1
37729-36 Droop adjusting bracket............................................. 1
37729-37 Spacer....................................................................... 2
37729-38 Needle bearing.......................................................... 2
37729-39 Orifice plug ................................................................ 2
37729-40 Subgovernor base..................................................... 1
37729-41 Column...................................................................... 1
37729-42 Nameplate................................................................. 1
37729-43 Screw, Phillips, rd. hd., 5-40x 1/4.............................. 4

Manual 37729 EGB-10 Two-Solenoid Speed Setting Mechanism
Woodward 9
Figure 3. Two-Solenoid Speed Setting Mechanism Parts

EGB-10 Two-Solenoid Speed Setting Mechanism Manual 37729
10 Woodward
Parts List For Figure 4
Ref. No. Part Name.....................................................Quantity
37729-101 Screw, rd. hd., 6-32 x 5/16 ........................................ 1
37729-102 Screw, rd. hd., 6-32 x 3/8 .......................................... 1
37729-103 Washer, lock, int. tooth, #6 (MS35333-37)................ 2
37729-104 Terminal block, 3 position.......................................... 1
37729-105 Insulation strip ........................................................... 1
37729-106 Orifice........................................................................ 2
37729-107 Cotter pin, 1/16 x 1 (MS24665-136) .......................... 2
37729-108 Solenoid .................................................................... 2
37729-109 Washer...................................................................... 2
37729-110 Spring washer............................................................ 2
37729-111 Cover......................................................................... 2
37729-112 Plunger...................................................................... 2
37729-113 Washer, lock, copper................................................. 2
37729-114 Nut, hex., 5/16-24 (1/2 inch across corners).............. 1
37729-115 Maximum speed screw.............................................. 1
37729-116 Setscrew (idle speed)................................................ 1
37729-117 Preformed packing, 0.210 OD (NASI 593.004).......... 1
37729-118 Shoulder pin .............................................................. 1
37729-119 Piston link.................................................................. 1
37729-120 Maximum speed piston.............................................. 1
37729-121 Headed pin................................................................ 1
37729-122 Retaining ring, internal (MS26625-1 100).................. 1
37729-123 Plug........................................................................... 1
37729-124 Preformed packing, 0.880 OD (NAS1593-115) ......... 2
37729-125 Seal piston................................................................. 1
37729-126 Seal spring................................................................. 1
37729-127 Loading spring........................................................... 1
37729-128 Idle speed piston ....................................................... 1
37729-129 Retaining ring, internal (MS16627-1087)................... 1
37729-130 Speed setting cylinder............................................... 1
37729-131 Thread insert, 5/16-24 x 0.469................................... 1
37729-132 Terminal lug, insulated, AWG 18-22.......................... 4

Manual 37729 EGB-10 Two-Solenoid Speed Setting Mechanism
Woodward 11
Figure 4. Speed Setting Cylinder Parts

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