TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 17-118 Change 1 17-28. CONTROL VALVE AND ACCUMULATOR HOUSING REPAIR (4L80-E) INITIAL SETUP: Applicable Models M997A2, M1025A2, M1035A2, M1043A2, M1045A2, M1097A2, M1123 Tools General mechanic’s tool kit: automotive (Appendix G, Item 1) Materials/Parts Gasket set kit (Appendix E, Item 43) Seal (Appendix E, Item 156) Two seals (Appendix E, Item 157) O-ring (Appendix E, Item 109) Petrolatum (Appendix B, Item 38) Manual References TM 9-2320-280-24P Equipment Condition Transmission disassembled into subassemblies (para. 17-14). Maintenance Level General support This task covers: a. Accumulator Housing Cleaning e. Control Valve Inspection b. Accumulator Housing Disassembly f. Control Valve Assembly c. Control Valve Disassembly g. Accumulator Housing Inspection d. Control Valve Cleaning h. Accumulator Housing Assembly 1. Remove six capscrews (1) from accumulator housing (2) and control valve assembly (8). 2. Remove accumulator housing (2), gasket (4), and springs (3) and (9) from control valve assembly (8). Discard gasket (4). 3. Remove gasket (5), spacer plate (6), and gasket (7) from control valve assembly (8). Discard gaskets (7) and (5). 4. Remove snapring (10) from pin (16) on the outside housing, and remove fourth clutch piston assembly (15) from housing (2). NOTE Perform step 5 for 1995-1996 transmissions only. 5. Remove snapring (17) and pin (16) from fourth clutch piston (15). 6. Remove seal (14) from fourth clutch piston (15). Discard seal (14). 7. Remove third clutch piston (12) from housing (2). 8. Remove seals (11) and (13) from third clutch piston (12). Discard seals (11) and (13). b. Accumulator Housing Disassembly a. Accumulator Housing Cleaning 1. Clean control valve assembly (8) and accumulator housing (2) thoroughly in solvent. 2. Air dry control valve assembly (8). CAUTION Do not use a honing stone, fine sandpaper, or crocus cloth to clean a valve. Use micro fine lapping compound 900 grit (J384-59). NOTE Work area should be well-ventilated, clean, and free from blowing dirt and dust.