Table 4-3. Unit Troubleshooting
Test or Inspection
1. ENGINE FAILS TO CRANK.
Step 1. Check voltage at right battery for 24 volts.
If voltage is below 24 volts, service battery (para 3-11). Tighten loose battery
cable connections and clean corroded battery connections. Repair or replace
any broken connections.
Step 2. Check engine key switch for loose or damaged connections.
Tighten or repair loose or damaged connections (para 4-60).
Step 3. Check starter solenoid wiring and connections for cracks, burns, or looseness.
Tighten loose connections or wiring. Replace damaged wiring and connections
Step 4. Check starter for looseness or damaged connections.
Tighten loose connections. Replace starter if damaged (para 4-58).
Step 5. If engine still fails to crank, notify the supervisor.
2. ENGINE FAILS TO DEVELOP FULL POWER/DOES NOT RUN SMOOTHLY.
Step 1. Check throttle position. Engine should run at 2100 RPM with throttle fully open.
Ensure throttle is in correct position.
If NBC exposure is suspected, all air filter media should be handled by personnel wearing
protective equipment. Consult your unit NBC Officer or NBC NCO for appropriate handling or
Step 2. Check air filter. Replace filter quarterly or every 300 hours of operation.
Change if needed (para 4-37).