TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 17-9. CENTER SUPPORT REPAIR (3L80) This task covers: a. Disassembly c. Inspection b. Cleaning d. Assembly INITIAL SETUP: Applicable Models Manual References All vehicles except: M997A2, M1025A2, TM 9-2320-280-24P M1035A2, M1043A2, M1045A2, M1097A2 Equipment Condition Tools Transmission disassembled into subassemblies General mechanic's tool kit: (para. 17-3). automotive (Appendix G, Item 1) Special Tools General Safety Instructions Driver handle (Appendix G, Item 34) Air pressure must not exceed 15 psi (103 kPa) Bushing service set (Appendix G, Item 33) when air check clutch piston. Materials/Parts Maintenance Level Inner piston seal (Appendix E, Item 128) General support Outer piston seal (Appendix E, Item 131) Four oil seal rings (Appendix E, Item 190) Transmission fluid (Appendix B, Item 23) NOTE Work area should be well ventilated, clean, and free from blowing dirt and dust. a. Disassembly 1. Remove four oil seal rings (1) from center support (2). Discard oil seal rings (1). 2. Compress spring retainer (11), and remove snapring (5) and spring retainer (11) from center support (2). 3. Remove three release springs (10), spring guide (9), and clutch piston (6) from center support (2). 4. Remove inner piston seal (7) and outer piston seal (8) from clutch piston (6). Discard piston seals (7) and (8). b. Cleaning Clean all center support components in accordance with para. 2-13. c. Inspection NOTE For general inspection instructions, refer to para. 2-14. 1. Inspect roller clutch inner race (3) for damage. Replace center support (2) if damaged. 2. Inspect oil ring grooves (4) in center support (2) for roughness or damage. Replace center support (2) if damaged. 3. Inspect center support (2) for damage. Replace if damaged. 4. Check all oil passages in center support (2) for blockage. 5. Inspect release springs (10) for signs of distortion or collapsed coils. Replace all springs (10) if any have distorted or collapsed coils. 6. Inspect clutch piston (6), spring guide (9), spring retainer (11), and snapring (5) for damage or distortion. Replace any part if damaged or distorted. 17-30