TM-9-2320-272-24-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 2 OF 4
JUNE 1998
TM-9-2320-272-24-2 - Page 638 of 991
TM 9-2320-272-24-2
3-457. REAR WHEEL VALVE MAINTENANCE
THIS TASK COVERS:
a. Removal
b. Cleaning and Inspection
c. Installation
INITIAL SETUP:
APPLICABLE MODELS
REFERENCES (TM)
M939A2
TOOLS
General mechanic’s tool kit (Appendix E, Item 1)
MATERIALS/PARTS
Two
locknuts (Appendix D, Item 334)
O-ring (Appendix D, Item 437)
Antiseize tape (Appendix C, Item 72)
TM 9-2320-272-10
TM 9-2320-272-24P
EQUIPMENT CONDITION
●
Parking brake set (TM 9-2320-272-10).
●
Air reservoirs drained (TM 9-2320-272-10).
GENERAL SAFETY INSTRUCTIONS
Eyeshields must be worn when releasing
compressed air.
a. Removal
WARNING
Air system components are subject to high pressure. Always
relieve pressure before loosening or removing air system
components.
1.
Remove cap (11) and valve stem (12) from tank valve (13), and allow tire (17) to deflate completely.
2.
Remove two nuts (6), washers (7), screws (10), washers (9), and support bracket (8) from bracket (3)
and axle flange (14).
3.
Remove hose (5) from connector (4) and tube (15).
4.
Remove wheel valve (21) from connector (20).
5.
Remove connector (20), O-ring (19), and washer (18) from hub (16). Discard O-ring (19).
6.
Remove connector (4) from wheel valve (21).
7.
Remove two locknuts (1), washers (2), and bracket (3) from wheel valve (21). Discard locknuts (1).
b. Cleaning and Inspection
1.
For general cleaning instructions, refer to 2-14.
2.
For general inspection instructions, refer to para. 2-15.
3.
Inspect wheel valve (21) for cracks, leaks, and stripped threads. Replace wheel valve (21) if cracked
or leaking. Repair stripped threads.
4.
Inspect bracket (3), support bracket (8), connectors (4) and (20), hose (5), tube (15), and hub (16) for
cracks, bends, and stripped threads. Replace part(s) if damaged.
3-1246
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