TM 10-3930-641-20
TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE (CONT)
15. STARTING MOTOR DOES NOT TURN OVER
Step 1. Inspect batteries.
Step 2. Inspect battery connections.
Clean and tighten.
Step 3. Check electrical starting circuit. (See page 2-74.)
Step 5. Inspect starting motor.
16. SUDDEN LARGE INCREASE IN FUEL USE
Inspect fuel lines and fittings for leaks.
17. UNUSUAL ENGINE VIBRATIONS
Step 1. Test fan assembly for fan blade out of balance.
Remove fan belts (see page 2-229) and operate engine at speed that had vibration. If there is no vibration, replace fan
Step 2. Check fan drive pulley for loose capscrews.