TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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14-27. AIR-CONDITIONING COMPRESSOR REPAIR This task covers: a. Preliminary Inspection and Cleaning c. Inspection b. Disassembly d. Assembly INITIAL SETUP: Applicable Models _______________ M997, M997A1, M997A2 Tools ____ General mechanic's tool kit: automotive (Appendix G, Item 1) Test Equipment _____________ Multimeter (Appendix G, Item 120) Special Tools __________ Compressor tool kit (Appendix G, Item 102) Materials/Parts _____________ Two O-rings (Appendix E, Item 105) (R-12 only) Seal kit (Appendix E, Item 176) Gasket kit (Appendix E, Item 39) Clutch accessory kit (Appendix E, Item 6) Materials/Parts (Cont’d) ____________________ Lubricating oil (Appendix B, Item 35) (R-12 only) Lubricating oil (Appendix B, Item 35.1) (FR-12 only) O-ring (Appendix E, Item 105) (FR-12 only) O-ring (Appendix E, Item 104.1) (FR-12 only) Manual References ________________ TM 9-2320-280-24P Equipment Condition _________________ Air-conditioning compressor removed (para. 14-24). General Safety Instructions ______________________ • Compressed air for cleaning purposes will not exceed 30 psi (207 kPa). • Compressor cylinder block may be pressurized. Maintenance Level _______________ Direct support 1. Inspect front of compressor shaft (6) for oil leakage. If oil leakage is evident, replace compressor shaft seal. ________ WARNING ________ Compressed air for cleaning purposes will not exceed 30 psi (207 kPa). Use only with effective chip guarding and personal protective equipment (goggles/shield, gloves, etc.). 2. Clean compressor assembly with refrigerant oil and dry with compressed air. ________ WARNING ________ Compressor cylinder block may be pressurized. Loosen oil filler plug slowly. If sound of escaping gas is heard, do not continue loosening plug until all pressure is released. 3. Loosen oil fill plug (3) to relieve any pressure buildup in compressor cylinder block (1). 4. Rotate compressor shaft (6) with ratchet and socket on compressor shaft nut (5). If severe rough spots or catches are felt while rotating shaft (6), replace compressor assembly. 5. Remove oil fill plug (3) and O-ring (4) from compressor cylinder block (1) and drain oil from cylinder block (1) into measuring container. Record amount of oil in measuring container. 6. Install O-ring (4) and fill plug (3) in cylinder block (1) and tighten fill plug (3) finger tight. 7. Inspect oil for chips, metal shavings, and metal particles. Replace compressor assembly if chips, metal shavings, or metal particles are present in oil. CAUTION _______ Do not clamp compressor body in vise. Clamp or support only at mounting ears, with blocks of wood, to prevent damage to compressor body. b. Disassembly a. Preliminary Inspection and Cleaning TM 9-2320-280-34 14-124 Change 1