TM-9-2320-280-34
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
JANUARY 1996
TM-9-2320-280-34 - Page 503 of 1258
TM 9-2320-280-34
9 - 4.
PINION SEAL REPLACEMENT
This task covers:
a.
Removal
b.
Installation
INITIAL SETUP:
Tools
General mechanic's tool kit:
Manual References
automotive (Appendix G, Item 1)
TM 9-2320-280-24
TM 9-2320-280.24P
Special Tools
Yoke seal installer (Appendix G, Item 83)
Equipment Condition
Service brake rotors removed (TM 9-2320-280-20).
Materials/Parts
Four lockwashers (Appendix E, Item 82)
Maintenance Level
Direct support
NOTE
Removal and installation procedures for pinion seals are basically
the same for front and rear differentials. This procedure covers the
rear differential pinion seal.
a. Removal
1.
Remove four capscrews (8), lockwashers (7), and rear propeller shaft (1) from pinion flange (4).
Discard lockwashers (7).
2.
Remove parking brake rotor (2) from pinion flange (4).
3.
Using a lb-in. torque wrench, measure torque required to rotate pinion (5) and record measurement.
4.
Count and record number of exposed threads on end of pinion (5) and mark locknut (3) and
pinion (5) for assembly.
5.
Remove locknut (3) and pinion flange (4) from pinion (5).
6.
Remove pinion seal (6) from pinion (5).
b. Installation
1.
Using yoke seal installer, install pinion seal (6) on pinion (5).
2.
Install pinion flange (4) and locknut (3) on pinion (5).
3.
Tighten locknut (3) to original position.
4.
Tighten locknut (3) in small increments, until torque required to rotate pinion (5) exceeds
original measurement by 2 lb-in. (0.2 N.m).
NOTE
Perform step 5 if replacing front pinion seal.
5.
Connect front propeller shaft (11) to pinion yoke (12) with two straps (9) and four capscrews (10).
Tighten capscrews (10) to 13-18 lb-ft (18-24 N ·m).
6.
Install parking brake rotor (2) and propeller shaft (1) on pinion flange (4) with four lockwashers (8)
and capscrews (8). Tighten capscrews (8) to 60 lb-ft (81 N.m).
9-4
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