TM 5-4310-354-14
Table 5-1. Direct Support and General Support Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE
1. ENGINE FAILS TO CRANK WHEN START BUTTON IS PRESSED.
Step 1.
Starting motor defective.
Repair or replace starting motor (para 7-4).
Step 2.
Fuel shutoff not functioning.
Inspect and repair or replace fuel injection pump (para 7-8).
Step 3.
Defective fuel transfer pump.
Replace fuel transfer pump (para 4-43).
Step 4.
Fuel pump incorrectly timed.
Check and correct timing (para 7-8).
Step 5.
Valves sticking or adjusted incorrectly.
Adjust valves (para 4-50), check for sticking valves and repair or replace as necessary (para
Step 6.
Low cylinder compression (para 1-10b).
Inspect piston rings and pistons. Repair or replace as necessary (para 7-24).
Step 7.
Excessive thrust pressure on camshaft or crankshaft.
Check end play of camshaft (para 7-22).
Check end play of crankshaft (para 7-26).
Step 8.
Check for coolant in cylinders.
Replace cylinder head gasket (para 7-13). If cylinder head gasket is not defective, inspect,
repair, or replace cylinder block (para 7-28).
Step 9.
Inspect for seized compressor.
Repair or replace air compressor (para 6-11 and 6-12).
2. ENGINE CRANKS BUT IS HARD TO START OR FAILS TO START.
Step 1.
Check valve adjustment and for valves sticking.
Adjust valves (para 4-S0), repair or replace sticking valves (para 7-13).
5-2 Change 2
