Table 2-1. TROUBLESHOOTING PROCEDURES
TEST OR INSPECTION
ENGINE WILL NOT CRANK. BATTERIES ARE FULLY CHARGED.
Step 1. Check for hydraulic seizure.
Remove fuel injectors (para 3-6).
Rotate engine crankshaft several times (if possible).
If engine now turns, reinstall injectors and start engine.
If engine does not turn with injectors out, proceed to next step.
Step 2. Check for mechanical seizure.
Disassemble engine (para 3-6) and check for bound rod or main
bearing, broken piston rings, or seized piston.
2. ENGINE WILL CRANK, BUT WILL NOT START OR STARTS HARD.
Step 1. Check fuel tank quantity.
Service fuel tank with proper grade fuel (TM 9-2320-281-10).
Step 2. Check for defective fuel pump shutoff valve.
Listen for shutoff valve opening (click) when ignition switch is placed to RUN position.
If opening (click) not heard, check for 12 vdc at switch terminal with ignition switch placed to RUN
If no voltage present , troubleshoot truck electrical system (TM 9-2320-281-20).
If voltage present, manually open shutoff valve and attempt start (TM 9-2320-281-20).
If engine starts, replace fuel shutoff valve (para 3-77c).
If engine does not start, proceed to next step.