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 346 of 836
TM 9-2320-272-24-4
5-50. CENTER SUPPORT MAINTENANCE
THIS TASK COVERS:
a. Removal
b. Disassembly
c. Cleaning and Inspection
d. Assembly
e. Installation
INITIAL SETUP:
APPLICABLE MODELS
MATERIALS/PARTS
All
SPECIAL TOOLS
Bushing installer (Appendix E, Item 24)
Retainer ring depth tool (Appendix E, Item 114)
Center support lifter (Appendix E, Item 27)
Compressor bar and screw (Appendix E,
Item 29)
Compressor base (Appendix E, Item 30)
Snapring gauge (Appendix E, Item 124)
TOOLS
General mechanic’s tool kit (Appendix E,
Item 1)
Spring tester (Appendix E, Item 131)
Depth gauge (Appendix E, Item 81)
Torque wrench (Appendix D, Item 144)
Arbor press
Hoist
Seal ring (Appendix D, Item 641)
Bushing (Appendix D, Item 27)
Eight self-locking retainers (Appendix D, Item 647)
Filter screen (Appendix D, Item 126)
Two piston inner seal rings (Appendix D, Item 258)
Two piston outer seal rings (Appendix D, Item 509)
Checkball (Appendix D, Item 37)
Two step-joint seal rings (Appendix D, Item 638)
Chamfered washer (Appendix D, Item 35)
Anchor bolt (Appendix D, Item 5)
Oil-soluble grease (Appendix C, Item 53)
REFERENCES (TM)
TM 9-2320-272-24P
1.
Remove center support anchor bolt (3) or (4) and washer (5) or (2) from transmission
housing (1). Discard anchor bolt (3) or (4) and washer (5) or (2).
NOTE
If old style hex-head bolt and washer were present, center support
must be rethreaded. Refer to task c.
2.
Remove snapring (6) from transmission housing (1).
3.
Attach center support lifter to center support (7) and remove center support (7) from transmission
housing (1).
NOTE
Record location of any shims present.
EQUIPMENT CONDITION
Third clutch removed (para. 5-49).
SPECIAL ENVIRONMENTAL CONDITIONS
Work area clean and free from blowing dirt and
dust.
5-340
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