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 264 of 799
TM 9-2320-272-24-3
4-94. TRANSFER CASE REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP:
APPLICABLE MODELS
All (except M936/A1/A2)
TOOLS
General mechanic’s tool kit (Appendix E, Item 1)
Torque wrench (Appendix E, Item 144)
Transmission jack (Appendix E, Item 147)
Hydraulic jack
Lifting device
MATERIALS/PARTS
Ten locknuts (Appendix D, Item 321)
Four lockwashers (Appendix D, Item 361)
Locknut (Appendix D, Item 308)
Ten locknuts (Appendix D, Item 291)
Antiseize tape (Appendix C, Item 72)
PERSONNEL REQUIRED
Two
REFERENCES (TM)
LO 9-2320-272-12
TM 9-2320-272-10
TM 9-2320-272-24P
EQUIPMENT CONDITION
l
Parking brake set (TM 9-2320-272-10).
l
Transfer case oil drained (LO 9-2320-272-12).
l
Wet reservoir removed (para. 3-185).
l
Transfer case-to-forward rear axle propeller shaft
removed (para. 3-149).
l
Spare tire removed (M923/A1/A2, M925/A1/A2,
M929/A1/A2, and M930/A1/A2) (TM 9-2320-272-10).
l
Transfer case interlock valve removed
(para. 3-143).
l
Transfer case front axle engagement control valve
removed (para. 3-144).
l
Transfer case shift rod removed (para. 4-88).
NOTE
Ensure transfer case shift lever is in HIGH position to prevent
propeller shaft from turning when loosening screws.
1.
Remove four screws (8), lockwashers (7), and propeller shaft (1) from transfer case input flange (2).
Discard lockwashers (7).
2.
Remove eight locknuts (5), screws (4), and propeller shaft (6) from transfer case front output
flange (3). Discard locknuts (5).
3.
Remove two locknuts (18), screws (9), clamp (10), parking brake cable (11), and spacer (20) from
parking brake cable bracket (19). Discard locknuts (18).
4.
Remove locknut (21) and parking brake cable (11) from parking brake lever (22). Discard locknut (21).
5.
Disconnect speedometer driveshaft (15) from speedometer drive adapter (17).
6.
Remove screw (12), washer (13), clamp (14), and speedometer driveshaft (15) from transfer case (16).
7.
Remove screw (25), clamp (24) with parking brake cable (11), and clamp (23) with speedometer
driveshaft (15) from transfer case (16).
NOTE
Tag all air lines for installation.
8.
Disconnect two vent lines (32) from elbows (27).
9.
Disconnect interlock vent line (26) from elbow (27).
10.
Disconnect supply line (31) from air cylinder elbow (30).
11.
Disconnect supply line (29) from interlock air cylinder elbow (28).
4-528
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