Woodward 1907 User manual

Product Manual 40053
(Revision B)
Original Instructions
1907 Liquid Fuel Valve/Limiter
Installation and 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 Out-of-date translations are marked with .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 1973
All Rights Reserved

Manual 40053 1907 Liquid Fuel Valve/Limiter
Woodward i
Contents
WARNINGS AND NOTICES............................................................................III
ELECTROSTATIC DISCHARGE AWARENESS ................................................. IV
CHAPTER 1. GENERAL INFORMATION...........................................................1
Introduction.............................................................................................................1
Description..............................................................................................................1
Specifications .........................................................................................................1
CHAPTER 2. INSTALLATION..........................................................................2
Introduction.............................................................................................................2
Adjustments............................................................................................................2
CHAPTER 3. PRINCIPLES OF OPERATION .....................................................4
Introduction.............................................................................................................4
General...................................................................................................................4
Starting ...................................................................................................................4
Acceleration............................................................................................................4
Steady State...........................................................................................................4
Deceleration ...........................................................................................................5
Bypass Feature ......................................................................................................5
Failsafe Feature......................................................................................................5
Auxiliary Start Feature (optional)............................................................................5
Input Shaft Torsion Spring (optional)......................................................................6
Relief Valve (optional) ............................................................................................6
CHAPTER 4. MAINTENANCE.........................................................................8
Troubleshooting......................................................................................................8
Disassembly ...........................................................................................................9
Cleaning................................................................................................................10
Inspection .............................................................................................................10
Assembly..............................................................................................................10
Testing and Calibration.........................................................................................11
CHAPTER 5. REPLACEMENT PARTS ...........................................................12
CHAPTER 6. SERVICE OPTIONS .................................................................16
Product Service Options.......................................................................................16
Woodward Factory Servicing Options..................................................................17
Returning Equipment for Repair...........................................................................17
Replacement Parts...............................................................................................18
Engineering Services............................................................................................18
How to Contact Woodward...................................................................................19
Technical Assistance............................................................................................19

1907 Liquid Fuel Valve/Limiter Manual 40053
ii Woodward
Illustrations and Tables
Figure 2-1. Outline Diagram and Adjustment Locations ........................................3
Figure 3-1. Schematic Diagram. 1907 Liquid Fuel Valve/Limiter...........................7
Figure 3-2. Schematic Diagram, 1907 Liquid Fuel Valve/Limiter with Auxiliary
Features.............................................................................................7
Figure 4-1. Measurement of Fuel Limit Lever Position...........................................9
Figure 5-1. Exploded View ...................................................................................13
Figure 5-2. Exploded View ...................................................................................15

Manual 40053 1907 Liquid Fuel Valve/Limiter
Woodward iii
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.

1907 Liquid Fuel Valve/Limiter Manual 40053
iv 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 40053 1907 Liquid Fuel Valve/Limiter
Woodward 1
Chapter 1.
General Information
Introduction
The 1907 Liquid Fuel Valve/Limiter meters fuel to gas turbines under all
operating conditions. The fuel valve is mechanically linked to and operated by a
governor actuator which determines the amount of fuel flow required for any gas
turbine mode of operation. The limiter function overrides the actuator input during
starting and rapid acceleration, thereby preventing excessive heating of the gas
turbine.
Description
The fuel valve/limiter consists essentially of three sections: a fuel metering valve,
a bypass valve, and an acceleration limiter. The fuel metering valve section
consists of a hollow plunger housed within a ported sleeve. The end of the
plunger is held in contact with either the input lever or the fuel limiter lever by a
spring. The size and shape of the metering port is determined by the turbine fuel
flow requirements. The bypass valve section consists of a spring-loaded rolling
diaphragm which senses both fuel inlet and outlet pressure to control the position
of a bypass valve plunger in a ported sleeve. An adjustment is provided for
positioning the bypass valve sleeve. The acceleration limiter section consists of a
spring-loaded rolling diaphragm mechanically linked to the fuel limiter lever.
Adjustment of the fuel limiter lever is provided to change the fuel flow to CDP
ratio.
Specifications
Refer to Figure 2-1 for fuel valve/limiter outline and mounting data.
Fuel Types: aviation gasoline, JP-4, JP-5, or diesel fuel
Specific Gravity: 0.70 to 0.85
Fuel Flow: 100 to 3120 lb/h (45 to 1415 kg/h)
Fuel Pressures:
Inlet 950 psig max. (6550 kPa max.)
Outlet 900 psig max. (6206 kPa max.)
CDP 155 psig max. (1069 kPa max.)
Static Test 1400 psig (9653 kPa)
The 1907 small liquid fuel valve may be configured without a CDP
acceleration fuel limiter. Without the CDP acceleration limiter option,
the input to meter fuel flow during all operating conditions is through
the input shaft from the governor/actuator system.

1907 Liquid Fuel Valve/Limiter Manual 40053
2 Woodward
Chapter 2.
Installation
Introduction
Mount the fuel valve/limiter square with the governor actuator linkage to prevent
binding. This unit is calibrated before shipment, and a minimum use of
adjustments is recommended. If adjustments are necessary, refer to Figure 2-1
for adjustment locations and proceed as follows.
Adjustments
1. The fuel level adjustment screw increases the fuel flow limit for any given
CDP value when turned counterclockwise.
2. The minimum limiter stop screw increases the minimum fuel limit when
turned clockwise.
3. The minimum fuel stop screw increases the minimum speed setting when
turned clockwise.
4. The maximum fuel stop screw increases the maximum speed setting when
turned counterclockwise.
5. The specific gravity adjustment changes the pressure drop across the
metering port. It is set by loosening the two screws holding the plate and
turning the socket-head screw, aligning its scribe mark with the desired
specific gravity mark on the plate.
6. The adjustable limiter lever (internal adjustment) changes the ratio of fuel
flow to CDP.
This adjustment should be made only where adequate test facilities
are available.

Manual 40053 1907 Liquid Fuel Valve/Limiter
Woodward 3
Figure 2-1. Outline Diagram and Adjustment Locations
(Do not use for construction.)

1907 Liquid Fuel Valve/Limiter Manual 40053
4 Woodward
Chapter 3.
Principles of Operation
Introduction
Figures 3-1 and 3-2 show the relationship of various parts of the fuel
valve/limiter. The connecting fuel passages between parts are simplified for ease
in visualizing the system.
General
The fuel valve/limiter is used in conjunction with a governor actuator. Fuel is
metered to the turbine for starting, acceleration, steady state operation, and
deceleration. The limiter section meters fuel flow during acceleration as a
function of turbine CDP. During steady state operation, fuel flow is controlled by
the mechanical linkage from the governor/actuator.
Starting
The fuel limiter will be in the minimum acceleration fuel position with the limiter
lever against the minimum limiter stop screw. The adjustable limit lever controls
the position of the metering piston. Under these conditions, the metering
discharge port is opened sufficiently to allow the required starting fuel flow. Fuel
from the fuel pump enters the inlet port (P1) where it is directed through the
metering pore to the discharge port (P2) and then to the engine. Excess fuel is
returned to the pump inlet through the bypass valve.
Acceleration
As the gas turbine attains ignition speed, the governor actuator rotates the
governor connecting lever to the maximum fuel position and moves the input
lever clockwise away from the metering piston. However, the metering piston is
held in the starting position by the adjustable limiter lever. Following ignition, the
gas turbine accelerates toward the governor speed setting. CDP increases with
turbine speed, causing the limiter diaphragm to move away from the minimum
limiter stop and rotate the adjustable limiter lever counterclockwise. The piston
loading spring now moves the metering piston upward, allowing more fuel to flow.
This action continues until the turbine reaches the set governor speed.
Steady State
When the turbine has accelerated to the governor preset speed, the governor
rotates the governor connecting lever counterclockwise to decrease fuel. In this
condition, fuel flow is regulated by the governor, which increases or decreases
fuel as a function of speed.

Manual 40053 1907 Liquid Fuel Valve/Limiter
Woodward 5
Deceleration
During large reductions in load or speed setting, the governing system will
reduce fuel flow to the turbine. To provide the minimum fuel flow necessary to
sustain combustion and prevent flameout, the minimum fuel adjustment screw
limits the movement of the throttle shaft in the decrease-fuel direction.
Bypass Feature
To meter fuel flow accurately as a function of port opening, a constant pressure
drop must be maintained across the metering port. Inlet pressure P1is applied to
one side of the bypass diaphragm, and outlet pressure to the opposite side. The
bypass piston is positioned by the force exerted by P2plus the spring force acting
on the bottom side of the diaphragm and by the force exerted on the top side.
With these forces in balance, the spring force against the diaphragm determines
the pressure drop (P1minus P2) across the fuel metering port, The diaphragm
positions the bypass valve plunger with respect to the bypass port and thereby
controls the amount of fuel returned to the pump inlet P0. Thus. a constant
differential pressure is maintained regardless of variations in flow or pressure
level.
An increase in outlet flow increases P2, unbalancing the forces acting across the
diaphragm. The diaphragm then moves up to reduce bypass flow, causing
pressure P1to increase until the forces acting across the diaphragm are again
balanced and movement stopped.
A decrease in outlet flow decreases P2, unbalancing the forces acting across the
diaphragm. The diaphragm then moves down to increase bypass flow, causing
pressure P1to decrease until the forces acting across the diaphragm are again
balanced and movement stopped.
Failsafe Feature
The bypass valve includes a failsafe disc to prevent excessive fuel flow to the
turbine should the bypass valve diaphragm rupture. The area of the disc is
greater than the effective area of the diaphragm. This reduces the differential
pressure across the metering port to compensate for the leakage past the
diaphragm and disc in the event of a rupture. The failsafe feature has no function
as long as the diaphragm is in good condition.
Auxiliary Start Feature (optional)
During start-up, the auxiliary stare feature provides a separate fuel supply to the
turbine. The schematic (Figure 3-2) shows two openings: one for the main
metering port to discharge pressure P2, and one for auxiliary start. The main
metering port is at a minimum fuel position during shutdown. When the governor
calls for fuel at start-up, the auxiliary start metering port supplies fuel through a
separate line. As the metering piston rises, the main metering port (P2) releases
fuel in addition to the auxiliary start metering port. As the turbine speed continues
increasing, the CDP increases, allowing the metering piston to rise. The auxiliary
start pore closes while the main metering pore takes over, supplying fuel to the
turbine.

1907 Liquid Fuel Valve/Limiter Manual 40053
6 Woodward
Input Shaft Torsion Spring (optional)
The input shaft torsion spring shown in Figure 3-2 forces the governor connecting
link to the minimum fuel stop position if a connecting link should break or become
disconnected. This spring has no function as long as the linkage or governor has
not failed.
Relief Valve (optional)
A spring-loaded poppet-type relief valve can be included to protect the system
from excessive pressure. Shims are used to adjust the pressure at which the
valve will dump fuel to the pump inlet (P0).

Manual 40053 1907 Liquid Fuel Valve/Limiter
Woodward 7
Figure 3-1. Schematic Diagram. 1907 Liquid Fuel Valve/Limiter
Figure 3-2. Schematic Diagram, 1907 Liquid Fuel Valve/Limiter with Auxiliary
Features

1907 Liquid Fuel Valve/Limiter Manual 40053
8 Woodward
Chapter 4.
Maintenance
Troubleshooting
Faults in the governing system are usually revealed in speed variations of the
turbine, but it does not necessarily follow that such speed variations indicate
governing system faults. Therefore, when improper speed variations appear,
check all components, including the turbine, for proper operation. Refer to the
governor system manuals for assistance in isolating the trouble. The following
steps describe troubles relating to the fuel valve/limiter.
Refer to Figure 2-1 for location of adjustment screws identified in the
following steps.
1. Check the linkage between the governor and the fuel valve/limiter to make
certain there is no binding or lost motion. Disconnect the actuator linkage
and check that the valve input shaft can be rotated between stops without
exceeding a torque of 15 lb-in (1.7 Nm).
2. During cranking (before reaching ignition speed), the governor actuator
should rotate the valve input shaft to the maximum fuel stop. If this does not
occur, the governor oil supply and the linkage should be checked again. If
necessary, substitute a spare governor to determine if the initial governor
was faulty.
3. If the governor moves the fuel valve input shaft to the maximum fuel stop
during cranking, but ignition does not occur, the minimum limiter stop may
be set too low. To increase, turn the screw clockwise.
4. If starting occurs, but acceleration is very slow, the fuel limit level may be
too low. To increase, turn the fuel level adjustment screw counterclockwise.
5. If acceleration to rated speed does not occur with the governor speed
setting properly adjusted, it may be due to:
a. Fuel limit lever being set too short
b. A CDP signal leak
c. Max fuel stop set too low
6. If overtemperature occurs during acceleration, the adjustment limit lever
may be set too long (or the fuel level adjustment set too high).
7. If the load carried by the turbine is limited by the maximum fuel adjustment,
increase this adjustment, being careful not to exceed any of the operating
conditions recommended by the turbine manufacturer.
8. If any valve/limiter malfunction is indicated, refer to disassembly, cleaning.
inspection, and assembly procedures for repairing unit.

Manual 40053 1907 Liquid Fuel Valve/Limiter
Woodward 9
Disassembly
Disassemble the fuel valve/limiter following the sequence of index numbers
assigned in Figure 5-1, giving special attention to the following. Circled index
numbers indicate items which do not require further disassembly and are
normally replaced as an assembly.
1. Clean the exterior surfaces of valve/limiter.
2. Discard all gaskets, O-rings, seals, retaining rings, cotter pins, clips,
locknuts, etc., removed in the process of disassembly.
3. Do not remove press-fit components unless replacement is necessary.
Removal of these components only for cleaning and inspection may
necessitate replacement.
4. Do not turn screw (15) in spring seat (14). If the screw must be removed,
make necessary measurements to assure that it can be replaced in its
original position.
5. Record the position of eccentric (31) before removing it.
6. Loosen one adjusting screw only, to remove fuel limiter lever (see Figure
4-1). The other screw maintains the correct position for reassembly.
7. If both adjustment screws are removed, measure “X” dimension (Figure 4-1)
to assure that these parts can be replaced in their original positions.
Figure 4-1. Measurement of Fuel Limit Lever Position
8. Mark throttle shaft (56) at a point parallel to the slot in throttle shaft stop (2).
9. To remove bypass valve sleeve (33), insert your finger (or wooden dowel) in
the cover end of the bypass valve bore and push the sleeve out of the body
through the diaphragm end of the bore. Do not remove the sleeve through
the cover end of the bypass valve bore.

1907 Liquid Fuel Valve/Limiter Manual 40053
10 Woodward
10. Pull throttle shaft (58) out of the body, removing input lever (55) and bearing
(57) in the process.
11. Remove plugs (61) and (91) from the body using 12-34 screws as pullers.
12. Insert a wooden dowel in the access port from which plug (81) was removed
and push CDP shaft (93) out of the body. Remove spacer (94), CDP lever
(95), key (96), bearing (97), and spacer (98) in the process.
13. Use a hook shaped scriber to pull out spacer (100) together with packing
(102) and channel seal (101). Remove packing (103). then remove seal
spacer (104) and remaining channel seal (101) together with packing (102).
Cleaning
Immerse all metal parts in cleaning solvent and wash ultrasonically or by
agitation. Use a non-metallic brush or jet of compressed air to clean slots, holes,
or apertures. Dry all parts after cleaning with a jet of clean, dry compressed air.
Inspection
1. Visually inspect all parts for wear or damage.
2. Inspect bearings in accordance with standard shop practice. Replace
bearings when there is any detectable roughness.
3. All pistons, valves, plungers, and rods should move freely without excessive
play. Do not lap in parts if possible to free by other means.
4. Polish slightly corroded, scored, or nicked parts with crocus cloth and oil.
Discard parts with excessive wear or pitting.
Assembly
Assemble the fuel valve/limiter in reverse order of the index numbers assigned in
Figure 5-1, following the special instructions given below. A dust free area is
recommended for assembly to obtain satisfactory results.
Obtain new gaskets, O-rings, seals, retaining rings, cotter pins, etc., to replace
those discarded during disassembly.
1. Lubricate packings and channel seals with petrolatum or light lubricating oil
prior to installation. Lubricate rolling diaphragms (21 and 76) with molykote
lubricant prior to installation. Lubricate metal parts lightly with lubricating oil
prior to assembly.
2. Press bearing (105) into body (109) with a 3/8 inch inside diameter tube
(with an OD slightly less than 1/2”) through the access bore from which plug
(61) was removed. Press the bearing in until seated against the shoulder.
3. Assemble packings (102) on channel seal (101). Insert one seal set into the
shaft bore and seat against the shoulder. Insert grooved seal spacer (104)
into the shaft bore and seat against the previously inserted seal set. Install
packing (103) in the groove in the shaft bore.

Manual 40053 1907 Liquid Fuel Valve/Limiter
Woodward 11
4. Insert CDP shaft (93) partially into the body, engaging CDP lever (95) and
taking care not to dislodge spacer (98) or channel seals (101). Align the key
in the shaft with the keyway in the lever and complete insertion of the shaft.
5. Start set screws (87) into fuel limit lever (88), if previously removed.
Assemble the lever on the inner end of the CDP shaft and seat against
spacer (94). Adjust the set screws to obtain dimension “X” recorded during
disassembly.
6. To assemble rolling diaphragm (76), insert a 3/16-inch diameter wooden
dowel through the hole for screw (83). Raise and hold link (82) in a workable
position. Carefully install a new seal (78) over the threads on the upper end
of link (82) and seat it against the shoulder. Install clamp (77) on the link
with the flat surface against seal (78). Collapse the top hat section of
diaphragm (76) in itself using piston (75) and install it on the link. Secure
with nut (74) tightened just enough to ensure sealing. Position the outer
flange of the diaphragm concentric with and flat against the face of housing
(109). Install retainer (73), making sure the diaphragm does not shift. Place
spring (71) on the piston. Carefully assemble the remaining parts in
sequence.
7. Assemble one packing (34) in the groove at the outer end of bypass valve
sleeve (33). Do not install second packing (34) at this time. Insert the sleeve
in the body from the side opposite cover (25) until the outer land of the
packing groove is flush with the bottom of the diaphragm counter bore in the
body. Assemble packing (32) on eccentric (31) and insert it into the body,
turning as required so that the eccentric pin projects into the relieved center
section of the sleeve. Install adjustment plate (30). Install second packing
(34) on the shouldered end of sleeve (33) from the cover end of the bore.
Carefully assemble the remaining parts in sequence.
8. Insert sleeve (35) into the body with the metering part facing toward the
outlet port.
9. Assemble rolling diaphragm (21) on bypass valve plunger (23). The bead on
the outer flange of the diaphragm must face outward. Support the outer
flange of the diaphragm and push the piston into the diaphragm, rolling the
diaphragm back over the piston for approximately 1/3 the length of the
piston. Insert the piston end of the assembly into sleeve (16) from the large
end, working the rolled section of the diaphragm into the relieved port of the
sleeve ID between the sleeve and piston. Hold the sleeve and piston so that
failsafe disc (19) is approximately 1/8-inch from the outer end of the sleeve
and seat the diaphragm bead in the groove in the large end of the sleeve.
Carefully insert the assembled parts into the body, making sure the
diaphragm bead is not dislodged. Hold the sleeve and test the action of the
plunger and diaphragm.
Testing and Calibration
Test and calibration specifications are available from Woodward upon request.
Be sure so specify the part number and serial number of the fuel valve/limiter.

1907 Liquid Fuel Valve/Limiter Manual 40053
12 Woodward
Chapter 5.
Replacement Parts
When ordering replacement pares it is essential that the following information be
given:
Fuel valve/limiter serial number and part number (as shown on nameplate)
Manual number (this is manual 40053)
Part reference number in parts list and description of part or part name
Figures 5-1 and 5-2 illustrate and list all replacement pares of the basic 1907 fuel
valve/limiter. Index numbers are assigned in disassembly sequence.
Parts List for Figure 5-1
Ref. No. Part Name............................... Quantity
40053-1 Screw....................................................1
40053-2 Governor connecting lever....................1
40053-3 Nut, hex................................................2
40053-4 Set screw..............................................2
40053-5 Spring torsion (optional)........................1
40053-6 Spring seat collar (optional)..................1
40053-7 Screw....................................................5
40053-8 Screw (aux. start-optional)....................5
40053-9 Plate .....................................................1
40053-10 Plate (aux. start-optional)......................1
40053-11 Cover, bypass valve .............................1
40053-12 Packing preformed ...............................1
40053-13 Spring, bypass valve ............................1
40053-14 Seat. assy., bypass valve spring ..........1
40053-15 Set screw..............................................1
40053-16 Sleeve, diaphragm clamping ................1
40053-17 Nut, hex, self-locking ............................1
40053-18 Seat, bypass valve spring.....................1
40053-19 Disc, failsafe.........................................1
40053-20 Piston, diaphragm.................................1
40053-21 Diaphragm, bypass rolling....................1
40053-22 Clamp, diaphragm ................................1
40053-23 Plunger, bypass valve ..........................1
40053-24 Screw....................................................3
40053-25 Cover, bypass valve .............................1
40053-26 Packing, preformed ..............................1
Ref. No. Part Name ...............................Quantity
40053-27 Spring. bypass valve...........................1
40053-28 Seat, loading spring ............................1
40053-29 Screw..................................................2
40053-30 Plate, bypass valve adjustment...........1
40053-31 Eccentric, spring gravity......................1
40053-32 Packing, preformed.............................1
40053-33 Sleeve, bypass valve ..........................1
40053-34 Packing, preformed.............................2
40053-35 Sleeve, fuel metering valve.................1
40053-36 Packing, preformed.............................1
40053-37 Packing, preformed.............................1
40053-38 Spring, fuel metering valve..................1
40053-39 Plunger, metering valve ......................1
40053-40 Nozzle, fuel (aux. start-optional)..........1
40053-41 Packing, preformed (aux. start-opt.)....2
40053-42 Packing, preformed (aux. start-opt.)....1
40053-42A Needle valve .......................................1
40053-43 Stop, fuel vlv sleeve (aux. start-opt.)...1
40053-44 Packing, preformed (aux. start-opt.)....1
40053-45 Packing, preformed (aux. start-opt.)....1
40053-46 Sleeve, fuel valve (aux. start-opt.).......1
40053-47 Packing, preformed (aux. start-opt.)....1
40053-48 Spring, fuel valve (aux. start-opt.) .......1
40053-49 Valve, metering (aux. start-opt.)..........1
40053-50 Plug and bleeder.................................1

Manual 40053 1907 Liquid Fuel Valve/Limiter
Woodward 13
Figure 5-1. Exploded View

1907 Liquid Fuel Valve/Limiter Manual 40053
14 Woodward
Parts List for Figure 5-2
Ref. No. Part Name............................... Quantity
40053-51 Packing, preformed ..............................1
40053-52 Pin, spring.............................................1
40053-53 Screw....................................................3
40053-54 Plate, retainer.......................................1
40053-55 Lever, input...........................................1
40053-56 Shaft, throttle........................................1
40053-57 Bearing, ball..........................................1
40053-58 Packing, preformed ..............................2
40053-59 Screw....................................................2
40053-60 Washer, flat, CRES, 13/64 ID
x 5/8 OD x 1/16THK .............................2
40053-61 Plug, relief valve...................................1
40053-61A “Optional” plug......................................1
40053-62 Packing, preformed ..............................1
40053-62A Preformed packing ...............................1
40053-63 Packing, preformed ..............................1
40053-63A Preformed packing ...............................1
40053-64 Valve, relief (optional)...........................1
40053-65 Screw....................................................4
40053-66 Washer, flat, CRES, 0.250 ID
x 0.428 OD (max.) x 0.030 thk..............4
40053-67 Cover assembly, CDP spring................1
40053-68 Collar....................................................1
40053-69 Bearing, thrust......................................1
40053-70 Seat, CDP spring (UPR).......................1
40053-71 Spring. CDP limiter...............................1
40053-72 Set screw..............................................1
40053-73 Retainer, diaphragm.............................1
40053-74 Nut, hex, self-locking ............................1
40053-75 Piston, diaphragm.................................1
40053-76 Diaphragm, CDP rolling........................1
40053-77 Clamp, CDP diaphragm........................1
40053-78 Seal ......................................................1
40053-79 Pin, cotter .............................................1
Ref. No. Part Name ...............................Quantity
40053-80 Washer, flat, CRES, 0.200/0.210 ID
x 0.360 OD (max.) x 0.030 thk ...............1
40053-81 Fin..........................................................1
40053-82 Link ........................................................1
40053-83 Screw, hex hd, dc pl stl 1/4-28
UNF2A x 1-3/4 thd full Ig........................1
40053-84 Nut, hex, dr, dc pl stl 1/4-28 UNF2B.......1
40053-85 Washer...................................................1
40053-86 Seal, thread............................................1
40053-87 Set screw ...............................................2
40053-88 Lever, fuel limit.......................................1
40053-89 Screw.....................................................2
40053-90 Washer, flat, CRES, 13/64 ID x 5/8
ID x 1/16 thk...........................................2
40053-91 Plug, packing..........................................1
40053-92 Packing, preformed................................1
40053-93 Shaft, CDP.............................................1
40053-94 Spacer, bearing (small)..........................1
40053-95 Lever, CDP.............................................1
40053-96 Key, Woodruff ........................................1
40053-97 Bearing, ball...........................................1
40053-98 Spacer (large) ........................................1
40053-99 Ring, retaining........................................1
40053-100 Spacer, packing .....................................1
40053-101 Seal, channel .........................................2
40053-102 Packing, preformed................................2
40053-103 Packing, preformed................................1
40053-104 Spacer, seal...........................................1
40053-105 Bearing. ball...........................................1
40053-106 Pin, straight, CRES, 0.251/0.252 dia.
x 1.250 I .................................................1
40053-107 Screw, drive ...........................................2
40053-108 Nameplate..............................................1
40053-109 Body assembly, fuel valve......................1