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 84 of 836
TM 9-2320-272-24-4
5-11. ENGINE OIL PUMP REPAIR
THIS TASK COVERS:
a.
Disassembly
b.
Cleaning and Inspection
c. Repair
d. Assembly
INITIAL SETUP:
APPLICABLE MODELS
M939/A1
TOOLS
General mechanic’s tool kit (Appendix E, Item 1)
Telescoping gauge (Appendix E, Item 136)
Snap gauge (Appendix E, Item 123)
Boring tool (Appendix E, Item 18)
Torque wrench (Appendix E, Item 144)
Soft-faced hammer
Arbor press
MATERIALS/PARTS
Bypass seat (Appendix D, Item 29)
Bypass spring (Appendix D, Item 30)
Bypass disc (Appendix D, Item 28)
Lockplate (Appendix D, Item 339)
Gasket (Appendix D, Item 176)
Two dowel pins (Appendix D, Item 96)
Two screw-assembled lockwashers
(Appendix D, Item 590)
Two gaskets (Appendix D, Item 174)
Seven lockwashers (Appendix D, Item 354)
Spring (Appendix D, Item 668)
Three lockwashers (Appendix D, Item 364)
Lubricating oil (Appendix C, Item 50)
Antiseize tape (Appendix C, Item 72)
Drycleaning solvent (Appendix C, Item 71)
a. Disassembly
REFERENCES (TM)
TM 9-2320-272-24P
EQUIPMENT CONDITION
l
Engine oil filter removed (para. 3-5).
l
Engine front gearcase cover removed (para. 4-18).
l
Engine accessory drive removed (para. 4-26).
l
Engine oil pump removed (para. 4-21).
GENERAL SAFETY INSTRUCTIONS
l
Keep tire extinguisher nearby when using
drycleaning solvent.
l
Drycleaning solvent is flammable and toxic. Do
not use near an open flame.
l
When cleaning with compressed air, wear
eyeshields and ensure source pressure does not
exceed 30 psi (207 kPa).
1.
Remove adapter (7), elbow (8), and nipple (6) from oil pump body flange (1).
2.
Remove elbow (9) and nipple (10) from oil pump body flange (1).
3.
Remove pipe plugs (11) and (12) from oil pump body flange (1).
4.
Remove pipe plug (5) from inner body (2).
5.
Remove pipe plug (3) from filter head (4).
5-78
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