TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 4-3. FUEL INJECTION NOZZLE REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: Tools Manual References (Cont'd ) General mechanic's tool kit: TM 9-2815-237-34P automotive (Appendix G, Item 1) Equipment Condition Special Tools •Hood raised and secured (TM 9-2320-280-10). Injection nozzle socket (Appendix G, Item 25) •Engine access cover removed (TM 9-2320-280-20) Crowfoot, 19 mm (Appendix G, Item 111) (rear injection nozzles only). Crowfoot, 7/8 in. (Appendix G, Item 113) •Battery ground cable disconnected (rear injection nozzle only) (TM 9-2320-280-20). Materials/Parts General Safety Instructions Gasket (Appendix E, Item 23) Do not perform this procedure near fire, flames, or sparks. Manual References TM 9-2320-280-10 Maintenance Level TM 9-2320-280-20 Direct support TM 9-2320-280-24P 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 hoses, connections, and openings immediately after disconnection or component removal to prevent contamination. Remove all plugs prior to connection. NOTE The fuel injection nozzle replacement procedures for pre-1990, 1990 and above 6.2 L engines and 6.5 L engines are the same. Refer to engine decal model number on left rocker arm cover before ordering replacement parts, since parts are not interchangeable. a. Removal NOTE •Removal and installation procedures for all eight injection nozzles are basically the same. This procedure covers one injection nozzle. •Have drainage container available to catch fuel. •Perform step 1 if replacing rear injection nozzles. 1. Loosen clamps (6) and remove fuel return hose (2) and cap (10) from fuel injection nozzle (7). 2. Loosen clamps (6) and disconnect fuel return hoses (2) from fuel injection nozzle (7). 3. Remove screw-assembled washer (4) from clamp (3) and support bracket (1). 4. Loosen and disconnect two fuel injection line nuts (5) from fuel injection nozzles (7). 5. Using injection nozzle socket, remove fuel injection nozzle (7) and gasket (8) from cylinder head (9). Discard gasket (8). 4-2