TM 9-2320-260-20
Table 2-2. Mechanical Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE
1. ENGINE WILL NOT CRANK
Step 1. Check starting system (table 2-4, electrical troubleshooting, malfunction 2).
Step 2. Remove starter and visually check starter drive, ring gear, and flywheel for broken and
missing teeth.
a. Replace starter if starter teeth are damaged (para. 4-5).
b. If ring gear is damaged, notify your supervisor.
WARNING
Ensure fuel shutoff valve is OFF and remove throttle cable before
cranking engine. Failure to do so may result in injury to personnel.
Step 3.
Check for seized engine or fluid-locked pistons. Remove radiator and rotate engine at
accessory drive pulley bolt two full revolutions with starter removed.
If engine is seized, notify your supervisor.
Step 4.
Check belt-driven engine accessories and water pump for seizure. Remove all drivebelts
Manually turn drive pulley of each accessory and water pump.
a. If water pump drive pulley or accessory drive pulley will not turn, notify your supervisor.
b. Replace accessory if any drive pulley will not turn (paras. 3-49, 3-55,4-2, and 9-17).
Step 5.
Check air induction system for presence of water.
Remove air cleaner element (para. 3-17).
a. Replace element if air cleaner element is contaminated with water (para. 3-17).
b. If water is present within air cleaner, notify your supervisor.
Step 6.
exhaust manifold (para. 3-42).
END OF TESTING!
2. ENGINE CRANKS BUT WILL NOT START
Step 1. Refer to table 2-4, electrical troubleshooting, malfunction 4.
Step 2. Check air cleaner indicator (TM 9-2320-260-10).
a. If red appears at indicator window, inspect air cleaner cap and air cleaner element for
obstructions (para. 3-17).
b. Reset air cleaner indicator (TM 9-2320-260-10).
WARNING
Diesel fuel is highly flammable. Do not perform troubleshooting
q
checks near open flame. Injury to personnel may result.
Compressed air source will not exceed 30 psi (207 kPa). When
q
cleaning with compressed air, eyeshields must be worn. Failure
to wear eyeshields may result in injury to personnel.
2-70
