TM 9-2320-272-24-4
5-15. FUEL PUMP HOUSING MAINTENANCE
THIS TASK COVERS:
c. Assembly
a. Disassembly
b. Inspection
INITIAL SETUP:
REFERENCES (TM)
APPLICABLE MODELS
M939/A1
TM 9-2320-272-24P
EQUIPMENT CONDITION
TOOLS
General mechanic's tool kit (Appendix E, Item 1)
l Governor spring pack removed (para. 5-14).
l Throttle shaft removed (para. 5-16).
MATERIALS/PARTS
Seven lockwashers (Appendix D, Item 412)
Gasket (Appendix D, Item 239)
Diesel fuel (Appendix C, Item 41)
a. Disassembly
NOTE
Tap edge of hardware lightly with soft-faced hammer to loosen,
1.
Remove screw (7), six screws (1), seven lockwashers (2), and washers (3) connecting front drive
cover (6) to fuel pump housing (4). Discard lockwashers (2).
2.
Pull fuel pump housing (4) straight out from front drive cover (6) to clear dowels.
3.
Remove gasket (5) from front drive cover (6). Discard gasket (5).
4.
Clean gasket remains from front drive cover (6) mating surfaces.
5.
Remove governor plunger (9) and torque spring (8) from fuel pump housing (4).
NOTE
Do not use straight pull on governor plunger torque spring. To
remove, twist spring off shoulder.
6.
Remove torque spring (8) from governor plunger (9).
b. Inspection
1.
Inspect governor plunger (9) for scoring, nicks, and scratches. If scored, nicked, or scratched, replace
governor plunger (9).
2.
Inspect torque spring (8) for broken coils. If coils are broken, replace torque spring (8).
c. Assembly
NOTE
Parts must submerged in diesel fuel and hands wet with diesel
fuel before steps 1 and 2 to prevent damage to close-tolerance
parts.
1.
Install torque spring (8) on governor plunger (9).
2.
Install torque spring (8) and governor plunger (9) in fuel pump housing (4).
3.
Install new gasket (5) and fuel pump housing (4) on front drive cover (6) with seven washers (3),
new lockwashers (2), six screws (1), and screw (7).
5-96
