TM 10-4320-318-14
Table 4-2. Troubleshooting Procedures
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE DOES NOT START.
Step 1. Check to see if fuel lines are damaged or leaking.
Replace damaged fuel lines (para. 4-23).
Step 2. Check for clogged fuel filter.
Replace fuel filter (para. 4-23).
Step 3. Check venting device for proper operation.
Remove venting valve and check for free
movement of internal valve ball.
If necessary, clean or replace venting valve (para. 4-23).
2. ENGINE IS HARD TO TURN.
Step 1. Check valve tappet clearance.
If necessary, adjust valve tappets (para. 4-30).
Step 2. Check adjustment of decompression device.
If necessary, adjust decompression device (para. 4-30).
3. BLACK SMOKE FROM EXHAUST (ENGINE MAY LACK POWER, INDICATED BY DROPPING SPEED.
Step 1. Check tappet clearance.
If necessary, adjust tappet clearance (para. 4-30).
Step 2. Check for faulty or leaky injection nozzle.
Replace injection nozzle if necessary (para. 4-26).
4. ENGINE LACKS POWER (NO SMOKE FROM EXHAUST).
Step 1. Check for clogged fuel filter.
Replace fuel filter (para. 4-23).
Step 2. Check venting device for proper operation.
Remove venting valve and check for free
movement of internal ball valve.
If necessary, clean or replace venting valve (para. 4-23).
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