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TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download

Page 154 of 953

3-76.1. WATER PUMP AND ADAPTER PLATE MAINTENANCE This task covers: a. Removal c. Installation b. Inspection INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Materials/Parts Water pump gasket (Appendix G, Item 62) (6.2 L only) Water pump gasket (Appendix G, Item 62.1) (6.5 L only) Pipe sealing compound (Appendix C, Item 44) Sealing compound (Appendix C, Item 45) Anaerobic gasket sealer (Appendix C, Item 39) Manual References TM 9-2320-280-24P Equipment Condition • Engine oil filler tube removed (para. 3-3). • Water pump inlet hose removed (para. 3-72). • Water pump pulley removed (para. 3-76). • Thermostat bypass hose removed (para. 3-67). • Fan drive hose disconnected (para. 3-68). • Tensioner, idler pulleys, and mounting hardware removed (para. 3-84). • Power steering pump removed (para. 8-24). NOTE Water pump is different on M1123 and A2 series vehicles. 1. Remove bypass nipple (13) from water crossover (12). 2. Remove studs (1), (11), (6), and (5), four capscrews (9), washers (10), two capscrews (7), capscrew (8), water pump (4), and adapter plate (3) from timing gear cover (2). 3. Remove seven capscrews (15), adapter plate (3), and gasket (14) from water pump (4). Discard gasket (14). 4. Clean remaining gasket material and sealing compound from sealing surfaces of adapter plate (3), water pump (4), and timing gear cover (2). 5. Remove heater hose nipple (17), elbow (16), and bypass hose adapter (19) from water pump (4). 1. Inspect water pump (4) for cracks, breaks, or loose impeller. Replace if cracked, broken, or impeller is loose. 2. Inspect adapter plate (3) for corrosion. If adapter plate (3) is excessively corroded, replace. 3. Inspect elbow (16), heater hose nipple (17), and bypass hose adapter (19) for stripped threads and breaks. If damaged, replace. 4. Inspect rivet (18) for damage or looseness. Replace if damaged or loose. Apply sealing compound to replacement rivet (18) prior to installation. b. Inspection a. Removal TM 9-2320-280-20-2 3-130.2 Change 3