TM-9-2320-280-34

TRUCK, UTILITY: M998 SERIES

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

JANUARY 1996
TM-9-2320-280-34

  TM-9-2320-280-34 - Page 505 of 1258

TM 9-2320-280-34
9 - 5.
DIFFERENTIAL REPLACEMENT
This task covers:
a. Removal
b. Installation
INITIAL SETUP:
Tools
Manual References
General mechanic's tool kit:
TM 9-2320-280-24P
automotive (Appendix G, Item 1)
TM 9-2320-280-20
Materials/Parts
Equipment Condition
Four lockwashers (Appendix E, Item 82)
Service brake rotors removed (TM 9-2320-280-20).
Two locknuts (Appendix E, Item 59)
Four seal washers (Appendix E, Item 198)
General Safety Instructions
Sealing compound (Appendix B, Item 50)
Differential must be supported during removal and
installation.
Personnel Required
One mechanic
Maintenance Level
One assistant
Direct support
a. Removal
NOTE
Have drainage container ready to catch oil.
1.
Remove drainplug (26) from differential (6). Allow oil to drain and install drainplug (26).
NOTE
Perform step 2 if replacing front or rear differential on vehicles
with serial numbers USBL Eff. 44825 and above.
2.
Remove four capscrews (11), two straps (10), and propeller shaft (12) from pinion yoke (7).
3.
Remove four capscrews (5), lockwashers (4), and rear propeller shaft (1) from differential flange (3).
Discard lockwashers (4).
4.
Remove parking brake rotor (2).
NOTE
Washers are not required when securing front differential to
mounting bracket.
5.
Remove two capscrews (9) and washers (20) from differential (6) and mounting bracket (8).
NOTE
Perform step 6 if replacing front differential.
6.
Remove two locknuts (16), washers (13), capscrews (14), washers (13), and mounting bracket (8)
from frame crossmember (15).
7.
Remove two locknuts (21), four seal washers (22), and two output flanges (23) from differential (6).
Discard locknuts (21) and seal washers (22).
WARNING
Differential must be supported during removal and installation.
Failure to do this may cause injury to personnel or damage to
equipment
8.
Support differential (6).
9.
Remove four capscrews (19) and washers (18) from differential (6) and side mounting brackets (17).
10.
Lower differential slightly and disconnect vent line (27).
9-6


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