TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 3 Download
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12-81. TROOP/CARGO WINTERIZATION HEATER FUEL PUMP REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: Applicable Models M998, M998A1, M1038, M1038A1 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) Four blind rivets (Appendix G, Item 257) 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 12-116 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 plugs prior to connection. NOTE • Have drainage container ready to catch fuel. • Prior to removal, tag leads for installation. 1. Disconnect fuel pump lead (2) from electrical connector (3). 2. Disconnect pump-to-hose fuel supply line (6) from connector (7). 3. Remove connector (7) from fuel pump (1). 4. Disconnect pump-to-bulkhead fuel supply line (8) from connector (9). NOTE Perform step 5 if vehicle is equipped with front arctic heater. Perform step 6 if vehicle is not equipped with front arctic heater. 5. Disconnect arctic heater fuel supply line (5) from connector (4). 6. Remove cap (11) from connector (4). 7. Remove two locknuts (15), washers (14), lockwasher (12), two capscrews (17), washers (14), fuel pump (1), and ground lead 799B (13) from bracket (16). Discard locknuts (15) and lockwasher (12). NOTE For instructions on replacement of rivets, refer to para. 10-66. 8. Inspect four rivets (19) on bracket (16) and crossmember (18) and replace rivets (19), if damaged. 9. Remove connectors (9) and (4) and tee (10) from fuel pump (1).