TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 17-96 Change 1 17-21. DIRECT CLUTCH ASSEMBLY REPAIR (4L80-E) Materials/Parts Inner seal (Appendix E, Item 155) Center seal (Appendix E, Item 154) Outer seal (Appendix E, Item 156) Transmission fluid (Appendix B, Item 24) Equipment Condition Transmission disassembled into subassemblies (para. 17-14). General Safety Instructions Air pressure must not exceed 80 psi (552 kPa) when air checking clutch piston. Maintenance Level General support This task covers: a. Disassembly d. Assembly b. Cleaning e. Direct Clutch Piston Movement Measurement c. Inspection NOTE Work area should be well-ventilated, clean, and free from blowing dirt and dust. 1. Remove snapring (1), clutch retainer (2), and outer race (3) from direct clutch housing (5). 2. Remove sprag assembly (4) from direct clutch housing (5). 3. Remove snapring (6), backing plate (7), five clutch plate assemblies (8), clutch plates (10), and dished plate (9) (1995-1996 transmission only) from direct clutch housing (5). NOTE Piston removed in step 4 is for 1995-1996 transmissions only. 4. Using spring compressor, adapter, and clutch spring adapter, remove snapring (11), spring and retainer assembly (12), and piston (13) from clutch housing (5). NOTE Perform step 5 for 1995-1996 transmissions only. 5. Remove inner (14), outer (15), and center seals (16) from clutch housing (5). Discard seals (14), (15), and (16). Clean all direct clutch components in accordance with para. 2-13. NOTE For general inspection instructions, refer to para. 2-14. 1. Inspect backing plate (7), five clutch plates (10), and dished plate (9) (1995-1996 transmission only) for signs of burning, scoring, or cracks. Replace any plate if burned, scored, or cracked. c. Inspection b. Cleaning a. Disassembly INITIAL SETUP: Applicable Models M997A2, M1025A2, M1035A2, M1043A2, M1045A2, M1097A2, M1123 Tools General mechanic’s tool kit: automotive (Appendix G, Item 1) Special Tools Clutch spring compressor (Appendix G, Item 47) Adapter (Appendix G, Item 48) Adapter (Appendix G, Item 45) Seal protectors (Appendix G, Item 46) Manual References TM 9-2320-280-24P