TM-9-2320-272-24-3
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 3 OF 4
JUNE 1998
TM-9-2320-272-24-3 - Page 130 of 799
TM 9-2320-272-24-3
4-46. FRONT WIRING HARNESS (M939/A1) REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP:
APPLICABLE MODELS
PERSONNEL REQUIRED
M939/A1
TWO
TOOLS
General mechanic’s tool kit (Appendix E, Item 1)
MATERIALS/PARTS
REFERENCES
TM 9-2320-272-10
TM 9-2320-272-24P
Cotter pin (Appendix D, Item 53)
Four tiedown straps (Appendix D, Item 694)
Gasket sealant, (Appendix C, Item 30)
Three tiedowns straps (Appendix D, Item 684)
Lockwasher (Appendix D, Item 364)
Two lockwashers (Appendix D, Item 416)
Two lockwashers (Appendix D, Item 379)
Three lockwashers (Appendix D, Item 376)
Eight lockwashers (Appendix D, Item 371)
Four lockwashers (Appendix D, Item 345)
Four locknuts (Appendix D, Item 291)
Spring nut (Appendix D, Item 673)
Lockwasher (Appendix D, Item 403)
Two screw-assembled lockwashers (Appendix D,
EQUIPMENT CONDITION
l
Parking brake sot (TM 9-2320-272-10).
l
Splash shields removed (TM 9-2320-272-10).
l
Air intake pipe removed (para. 3-14).
l
Battery ground cables disconnected (para. 3-126).
l
Failsafe warning module removed (para. 3-106).
l
Main light switch removed (para. 3-108).
l
Protective control box removed (para. 3-115).
l
Turn signal flasher removed (para. 3-114).
Item 587)
a. Removal
Tag wires, connectors, and cables for installation.
1.
Disconnect front wiring harness connector (8) from front lights cable assembly receptacle (1).
2.
Remove nut (5), washer (3), screw (2), washer (3), cable clamp (4), and wiring harness (7) from
radiator (6).
3.
Disconnect tachometer pulse sender connector (19) from fuel pump connector (18).
4.
Disconnect fuel pressure transducer connector (17) on fuel pump (16) from front wiring harness
connector (20).
5.
Remove screw (11), washer (12), and cable clamp (10) from engine intake manifold (9).
6.
Remove nut (14) and two wires (13) from fuel pump shutoff solenoid (15).
7.
Disconnect wire (23) from engine temperature sending unit (22) and remove wiring harness from
behind air compressor (21) and intake manifold (9).
8.
Disconnect wires (25) and (26) from ether start fuel pump pressure switch (24).
4-394
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