TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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14-24. AIR-CONDITIONING COMPRESSOR REPLACEMENT This task covers: a. Removal b. Installation a. Removal 1. Turn both service valves (3) fully clockwise until front-seated. 2. Loosen two nuts (2) on service valves (3) slowly to allow refrigerant to escape from compressor (20). 3. Remove two service valves (3) and O-rings (1) from compressor (20) slowly. Discard O-rings (1). 4. Remove screw (10) and clamp (11) from adjusting bracket (6). NOTE Prior to removal, tag leads for installation. 5. Disconnect two compressor leads (23) from two harness leads (24). 6. Remove nut (9), lockwasher (8), and washer (7) from adjusting bracket (6) and timing chain cover bolt. Discard lockwasher (8). 7. Remove two nuts (14), lockwashers (13), washers (12), capscrews (4), washers (5), adjusting bracket (6), and clamp (21) and washers (7), from compressor (20). Discard lockwashers (13). 8. Remove drive belt (16) from pulley (15). 9. Remove adjusting bracket (6) and washer (7) from compressor (20) and timing chain cover bolt. NOTE • Perform steps 1 and 2 if compressor is being removed to service other than the A/C system components. • Tag service valves “front-seated” for installation. • Compressors with FR-12 systems are removed the same. CAUTION ______ Ensure valve holes in compressor and service valves are immediately capped after service valve removal. Failure to do so may cause damage to compressor. ________ WARNING ________ Air conditioning system must be discharged, prior to replacing components in vapor system. Failure to do this may result in injury to personnel or damage to equipment. INITIAL SETUP: Applicable Models _______________ M997, M997A1, M997A2 Tools ____ General mechanic's tool kit: automotive (Appendix G, Item 1) Materials/Parts _____________ Five lockwashers (Appendix E, Item 79) Two O-rings (Appendix E, Item 105) Lubricating oil (Appendix B, Item 35) (R-12 only) Lubricating oil (Appendix B, Item 35.1) (FR-12 only) Manual References ________________ TM 9-2320-280-20 TM 9-2320-280-24P Equipment Condition _________________ • Air-conditioning system discharged (para. 14-17) (compressor replacement only). • Right splash shield removed (TM 9-2320-280-20). • Air filter to air horn hose removed (TM 9-2320-280-20). • Disconnect battery ground cable (TM 9-2320-280-20). General Safety Instructions ______________________ Air-conditioning system must be discharged, prior to replacing components. Maintenance Level _______________ Direct support TM 9-2320-280-34 14-120 Change 1