TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 3 Download
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12-26. ARCTIC HEATER FUEL PUMP REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: Applicable Models M966, M966A1, M996, M996A1, M997, M997A1, M997A2, M998, M998A1, M1025, M1025A1, M1025A2, M1037, M1038, M1038A1, M1121 Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Materials/Parts Sealing compound (Appendix C, Item 44) Two locknuts (Appendix G, Item 70) Lockwasher (Appendix G, Item 175) Manual References TM 9-2320-280-10 TM 9-2320-280-24P Equipment Condition Battery ground cable disconnected (para. 4-73). General Safety Instructions Do not perform this procedure near fire, flames, or sparks. a. Removal TM 9-2320-280-20-3 12-38 Change 2 WARNING Diesel fuel is highly flammable. Do not perform this procedure near fire, flames, or sparks. Severe injury or death will result. CAUTION Cover or plug all open hoses and connections immediately after disconnection to prevent contamination. Remove all covers or plugs prior to connection. NOTE • Have drainage container ready to catch fuel. • Prior to removal, tag leads for installation. • Fuel pump is located under right rear passenger seat floor along frame. 1. Disconnect lead 402A (13) from wiring harness lead (14). 2. Disconnect pump-to-tank fuel supply line (11) from connector (12). 3. Remove connector (12) from fuel pump inlet (11.1). NOTE Proceed to step 5 for M996, M996A1, M997, M997A1, M997A2, M998, M998A1, M1038, and M1038A1 models only. Perform step 4 for all other models. 4. Remove cap (7) and connector (6) from fuel pump tee (5). 5. Remove fuel supply line (8) and connector (6) from fuel pump tee (5). 6. Disconnect tube assembly (10) from connector (9). 7. Remove connector (9) from fuel pump tee (5). 8. Remove two locknuts (17), washers (2), ground lead 416A (16), lockwasher (15), clamp (18), two capscrews (3), washers (2), and fuel pump (4) from mounting bracket (1). Discard locknuts (17) and lockwasher (15). 9. Remove fuel pump tee (5) from fuel pump outlet (4.1). 10. Inspect connectors (6), (9), and (12) for damaged threads or cracks. Replace if cracked or damaged.