TM 9-2320-272-24-4
5-18. FUEL PUMP SETUP AND CALIBRATION
THIS TASK COVERS:
i. Testing and Adjusting Pump Main Pressure
a. Throttle Shaft Cover Removal
j. Testing and Adjusting Fuel Pressure
b. Mounting Pump to Test Stand
k. Testing and Adjusting Governor Fuel
c. Fuel Pump Run-In
Pressure
d. Testing Pump Seals for Leaks
l. Checking and Adjusting Governor Weight
e. Testing Governor Cutoff RPM
Pressure
f. Testing and Adjusting Throttle Leakage
m. Testing and Adjusting Idle Speed
g. Testing and Adjusting Idle Speed
(VS Governor Only)
h. Checking and Adjusting Throttle Lever
n. Shutdown and Removal from Test Stand
Travel
INITIAL SETUP:
MATERIALS/PARTS
APPLICABLE MODELS
Two drive pins (Appendix D, Item 101)
M939/A1
Lockwasher (Appendix D, Item 400)
SPECIAL TOOLS
Throttle shaft soft ball bearing (Appendix D,
Item 666)
Fuel injection tester (test stand) (Appendix E,
Grease, GAA (Appendix C, Item 28)
Item 49)
Lubricating oil OE/HDO 30 (Appendix C, Item 50)
Spring pack adjusting tool (Appendix E,
45A calibrating fluid (Appendix C, Item 13)
Item 130)
Sealing tape (Appendix C, Item 72)
Travel template (Appendix E, Item 150)
Level and angle indicator (Appendix E, Item 66)
REFERENCES (TM)
Shaft installation tool (Appendix E, Item 120)
TM 9-2320-272-24P
Gear pump block plate (Appendix E, Item 57)
TM 9-4910-571-12
TOOLS
TM 9-4910-571-12P
General mechanic's tool kit (Appendix E,
EQUIPMENT CONDITION
Item 1)
l Fuel pump removed from vehicle (para. 4-35).
Straightedge
l Fuel pump shutoff valve removed (para. 4-36 or
4-37).
a. Throttle Shaft Cover Removal
NOTE
Perform task a. only if throttle shaft cover has not been removed.
1.
Center punch each of the two drive pins (8) connecting throttle shaft cover (2) to fuel pump housing (1).
2.
Drill drive pins (8) out of throttle shaft cover (2). Discard drive pins (8).
3.
Remove nut (4), lockwasher (5), washer (6), screw (7), and throttle lever (3) from throttle shaft cover (2).
Discard lockwasher (5).
4.
Remove throttle shaft cover (2) from fuel pump housing (1).
5.
Install throttle lever (3) on fuel pump housing (1) with washer (6), new lockwasher (5), and nut (4).
5-104
