TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 3 - 18. GLOW PLUG TIP REMOVAL (DAMAGED OR BROKEN) This task covers: Removal INITIAL SETUP: Tools Equipment Condition General mechanic's tool kit: • Fuel injector nozzle removed (para. 4-3). automotive (Appendix G, Item 1) • Drivebelts loosened (TM 9-2320-280-20). Needlenose pliers, 90°(Appendix G, Item 134) General Safety Instructions Special Tools Compressed air used for cleaning purposes will not Socket 3/8 in. (Appendix G, Item 114) exceed 30 psi (207 kPa). Manual References Maintenance Level TM 9-2320-280-20 Direct support Personnel Required One mechanic One assistant Removal NOTE Affected cylinder piston must be brought to (TDC) position to ensure intake and exhaust valves are closed. 1. Using socket wrench and breaker bar on torsion damper bolt (3), rotate crankshaft to bring piston (in affected cylinder) to top dead center (TDC) position. NOTE Perform steps 2 and 3 if failed glow plug is still installed in cylinder head. Perform step 4 if failed glow plug has been removed from the cylinder head and glow plug tip is broken off in cylinder head prechamber. Perform steps 5 and 6 if failed glow plug tip is swollen. 2. Inserting pliers through injector nozzel opening (1), grasp glow plug tip, break off expanded tip, and remove the piece from the prechamber. 3. Remove the glow plug (TM 9-2320-280-20). WARNING Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only with effective chip guarding and personnel protective equipment (goggles, shield, gloves, etc.). 4. Direct compressed air into glow plug port (2) to expel broken tip from prechamber through injector nozzle opening (1). 3-38