TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 14-14. HEATER/AIR-CONDITIONING CONTROL BOX REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: Applicable Models Manual References M997, M997A1, M997A2 TM 9-2320-280-20 TM 9-2320-280-24P Tools General mechanic's tool kit: Equipment Condition automotive (Appendix G, Item 1) • Battery ground cable disconnected (TM 9-2320-280-20). Materials/Parts • Evaporator blower housing opened Twenty lockwashers (Appendix E, Item 81) (TM 9-2320-280-20). Nut and lockwasher assembly (Appendix E, Item 96) Maintenance Level Three pushnuts (Appendix E, Item 136) Direct support Tape (Appendix B, Item 58) Personnel Required One mechanic One assistant a. Removal NOTE Prior to removal, tag all leads for installation. 1. Disconnect fuel pump lead (2) and compressor lead (3) from fuel pump and compressor jumper harness (1). 2. Disconnect four control box leads (28) from condenser fan leads (27). 3. Disconnect four blower harness leads (16) from fan blower motor leads (15). 4. Remove capscrew (18), lockwasher (17), clamp (19), and control box blower harness (20) from blower housing (14). Discard lockwasher (17). 5. Pull insulation (22) back to allow access to capscrew (21). 6. Remove nut (11), lockwasher (12), washer (13), capscrew (21), washer (13), clamp (24), and harness (20) from body (23). Discard lockwasher (12). 7. Disconnect control box connector plug (6) from heater (5). CAUTION Handle cold control probe carefully to prevent damage to probe or evaporator. 8. Remove cold control probe (26) from evaporator coils (25). 9. Remove screw (10), lockwasher (9), clamp (8), heater cable (7), fan harness (29), and cold control probe (26) from heater outlet duct bracket (30). Discard lockwasher (9). 10. Pull fuel pump lead (2) and compressor lead (3) up through grommet (4). 14-80