TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 14-108 Change 1 14-20. AIR-CONDITIONING EVAPORATOR MAINTENANCE This task covers: a. Removal c. Assembly b. Disassembly d. Installation INITIAL SETUP: Applicable Models _______________ M997, M997A1, M997A2 Tools ____ General mechanic's tool kit: automotive (Appendix G, Item 1) Materials/Parts _____________ Seven O-rings (Appendix E, Item 105) (R-12 only) Moisture seal (Appendix E, Item 152) (R-12 only) Lubricating oil (Appendix B, Item 35) (R-12 only) Two O-rings (Appendix E, Item 106) (FR-12 only) Lubricating oil (Appendix B, Item 35.1) (FR-12 only) O-ring (Appendix E, Item 104.2) (FR-12 only) Four O-rings (Appendix E, Item 105) (FR-12 only) Materials/Parts (Cont’d) ____________________ Moisture seal (Appendix E, Item 151.1) (FR-12 only) Manual References ________________ TM 9-2320-280-10 TM 9-2320-280-20 TM 9-2320-280-24P Equipment Condition _________________ • Air-conditioning system discharged (para. 14-17). • Evaporator blower motor housing removed (TM 9-2320-280-20). General Safety Instructions ______________________ Air-conditioner system must be discharged, prior to replacing components. Maintenance Level _______________ Direct support 1. Disconnect high pressure line (10) from sight glass line (8). Remove and discard O-ring (9). 2. Disconnect low pressure line (12) from evaporator outlet line (15). Remove and discard O-ring (13). NOTE Prior to removal, tag leads for installation. 3. Disconnect two wires (11) from low pressure switch (14). CAUTION • Avoid kinking or excessive bending of cold control probe during removal. • Evaporator coil and evaporator duct clearances are tight, avoid forcing or twisting during removal. 4. Remove cold control probe (7) from coils (3) and position probe (7) away from evaporator (2). 5. Loosen clamp (5) and disconnect drain tube (6) from drain pan (4). 6. Remove five screws (1) and evaporator (2) from evaporator duct (16). .WARNING. Air conditioner 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. CAUTION Cover or plug all open hoses and connections immediately after disconnection to prevent contamination. Remove all plugs prior to connection. a. Removal