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 376 of 799
TM 9-2320-272-24-3
4-120. STEERING GEAR (SHEPPARD) REPAIR
THIS TASK COVERS:
a. Disassembly
b. Cleaning, Inspection, and Repair
c. Assembly
INITIAL SETUP
APPLICABLE MODELS
M939A2
TOOLS
General mechanic’s tool kit (Appendix E, Item 1)
Torque wrench (Appendix E, Item 144)
Mandrel
MATERIALS/PARTS
Bearing retainer (Appendix D, Item 13)
Twenty lockwashers (Appendix D, Item 364)
Gasket and seal set (Appendix D, Item 247)
Steering parts kit (Appendix D, Item 678)
Eight lockwashers (Appendix D, Item 417)
Lubricating oil (Appendix C, Item 48)
Crocus cloth (Appendix C, Item 20)
GAA grease (Appendix C, Item 28)
Drycleaning solvent (Appendix C, Item 71)
REFERENCES (TM)
LO 9-2320-272-12
TM 9-214
TM 9-2320-272-24P
EQUIPMENT CONDITION
Steering gear drained (LO 9-2320-272-12).
Steering gear (Sheppard) removed (para. 4-118).
GENERAL SAFETY INSTRUCTIONS
Keep fire extinguisher nearby when using
drycleaning solvent.
Drycleaning solvent is flammable and toxic. Do
not use near open flame.
Compressed air source will not exceed 30 psi
(207 kPa).
Eyeshields must be worn when cleaning with
compressed air.
NOTE
Use a clean, protected work surface for steering gear
disassembly, repair, and assembly.
High-pressure seal and washer are obsolete.
Ensure high-pressure seal kit, P/N 2370461, is available before
performing procedure.
1.
Remove two relief valve plungers (10) from cylinder head (3) and bearing cap (7).
2.
Remove two O-rings (11) from relief valve plungers (10). Discard O-rings (11).
3.
Remove eight screws (13) and lockwashers (12) from output shaft cover (14) and steering gear
housing (5). Discard lockwashers (12).
4.
Using crocus cloth, remove any rust or scale from exposed shaft, except splines, on output shaft and
gear (16).
NOTE
Mark output shaft cover and housing for installation.
5.
Remove output shaft cover (14) from steering gear housing (5).
6.
Remove O-ring (15) from output shaft cover (14). Discard O-ring (15).
4-640
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