TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 112 of 1205
TM 9-2320-387-24-l STARTABILITY KNOWN INFO 1 ENGINE NOT LOCKED BATTERIES OK I I RUN THE GLOW PLUGS CIRCUIT STARTING SYSTEM OK TESTS. RETURN HERE. FUEL SYSTEM OK AIR INTAKE/EXHAUST OK I I GLOW PLUGS COMPRESSION L KNOWN INFO fNGlNE NOT LOCKED 3AlTERIES OK 3TARTlNG SYSTEM OK SLOW PLUGS OK AIR NTAKEEXHAUST -UEL SYSTEM OK POSSIBLE PROBLEMS COMPRESSION DIAGNOSTIC FLOWCHART REASON FOR QUESTION If the engine is hard to start it may be the glow plugs. RUN COMPRESSION UNBALANCE. IS THE COMPRESSION UNBALANCE STE/ICE-R TEST 14 (Page 2493) OK? REASON FOR QUESTION If cylinder compression is far enough out of balance, it could prevent the vehicle from starting. The lower the unbalance, the MAINTENANCE YES Y 2-48