TM-9-2320-272-24-4
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 4 OF 4
JUNE 1998
TM-9-2320-272-24-4 - Page 246 of 836
TM 9-2320-272-24-4
5-36. FUEL INJECTION PUMP MAINTENANCE
THIS TASK COVERS:
a. Camshaft Removal
b. Tappet and Plunger Removal
c. Barrel and Control Rack Removal
d. Cleaning and Inspection
e. Leakage Test
f.
Delivery Valve and Barrel Installation
g. Plunger and Control Rack Installation
h. Tappet and Spring Installation
i. Camshaft Installation
INITIAL SETUP:
APPLICABLE MODELS
M939A2
SPECIAL TOOLS
Two separation tubes (Appendix E, Item 119)
Side plug puller (Appendix E, Item 111)
Three tappet holders (Appendix E, Item 134)
Tappet spring compressor (Appendix E, Item 135)
TOOLS
General mechanic’s tool kit (Appendix E, Item 1)
Torque wrench (Appendix E, Item 144)
Arbor press
MATERIALS/PARTS
Fuel injection pump repair kit (Appendix D,
Item 137)
Fuel injection pump maintenance kit
(Appendix D, Item 136)
MATERIALS/PARTS (Contd)
Sealing compound (Appendix C, Item 61)
GAA grease (Appendix C, Item 28)
Drycleaning solvent (Appendix C, Item 71)
Lubricating oil (Appendix C, Item 50)
REFERENCES (TM)
TM 9-2320-272-24P
EQUIPMENT CONDITION
R.Q.V. governor housing removed (para. 5-35).
GENERAL SAFETY INSTRUCTIONS
Diesel fuel is flammable. Do not perform this task
near open flames.
Keep fire extinguisher nearby when using
drycleaning solvent.
Drycleaning solvent is flammable and toxic. Do
not use near open flame.
a. Camshaft Removal
WARNING
Diesel fuel is flammable. Do not perform fuel system procedure
near open flame. Injury to personnel may result.
Drycleaning solvent is flammable and toxic. Do not use near
open flame and always have a fire extinguisher nearby when
solvents are used. Use only in well-ventilated places, wear
protective clothing, and dispose of cleaning rags in approved
container. Failure to do this may result in injury or death to
personnel and/or damage to equipment.
CAUTION
Improper cleaning methods and use of unauthorized cleaning
solvents can damage equipment.
1.
Clean exterior of fuel pump housing (10) with drycleaning solvent.
2.
Using side plug puller, remove three side plugs (7) from fuel pump housing (10). Discard side plugs (7).
3.
Remove three spacer blocks (8) from side holes (9).
CAUTION
Keep cylinder parts together for replacement in their original
cylinder. Failure to do so may result in damage to fuel pump.
4.
Remove six nuts (4), lockwashers (3), spacer rings (2), and locking tabs (1) from studs (5) and delivery
valve holders (13). Discard lockwashers (3).
5-240
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