TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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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