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TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 3 Download

Page 544 of 1170

11-193. HEATER FUEL LINES REPLACEMENT This task covers: a. Heater Fuel Line Replacement f. Bulkhead Coupling Replacement b. Cab Fuel Line Replacement g. Bulkhead Fuel Line Replacement c. Shutoff Valve Replacement h. Pump Fuel Line Replacement d. “B” Beam Fuel Line Replacement i. Tank Fuel Line and Supply Tube Replacement e. Filter Fuel Line Replacement INITIAL SETUP: Applicable Models M996, M996A1, M997, M997A1, M997A2 Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Materials/Parts Sealing compound (Appendix C, Item 44) Tiedown strap (Appendix G, Item 308) Manual References TM 9-2320-280-24P General Safety Instructions Do not perform this procedure near fire, flames, or sparks. WARNING Diesel fuel is highly flammable. Do not perform this procedure near fire, flames, or sparks. Severe injury or death will result. NOTE • Fuel line replacement is basically the same on M996, M996A1, M997, M997A1, and M997A2 vehicles. This procedure covers M997, M997A1, and M997A2 vehicles. • Have drainage container ready to catch fuel. • Apply sealing compound to threads of all fuel line joints before installation. • Cover or plug all open connections immediately after removal to prevent contamination. Remove all covers or plugs prior to connection. 1. Open blower housing (para. 11-198). 2. Disconnect fuel line (1) from heater (2) and allow fuel to drain. Remove tiedown strap (3) from fuel line (1) and control cables (4). Discard tiedown strap (3). 3. Disconnect fuel line (1) from cab fuel line (8), allow fuel to drain, and remove fuel line (1). 4. Install fuel line (1) through grommet (14) and connect to cab fuel line (8). 5. Connect fuel line (1) to heater (2). 6. Install fuel line (1) on control cables (4) with tiedown strap (3). 7. Close blower housing (para. 11-198). 1. Remove capscrew (11), harness clamp (12), and clamp (6) from A/C lines (5), body (13), and fuel line (8). 2. Disconnect fuel line (8) from shutoff valve (7) and allow fuel to drain. 3. Disconnect fuel line (8) from heater fuel line (1) and remove fuel line (8) from vehicle. 4. Install fuel line (8) in vehicle and connect to heater fuel line (1). b. Cab Fuel Line Replacement a. Heater Fuel Line Replacement TM 9-2320-280-20-3 11-280 Change 2