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TM 5-4320-306-24
Table 3-1. Direct Support Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE FAILS TO CRANK OR CRANKS AT LOW SPEED
Step 1. Check for faulty starter motor.
Test and repair faulty starter motor (para 3-17).
Step 2. Check for restricted impeller.
Remove pump body (para 3-4) and remove foreign objects restricting impeller.
2. ENGINE CRANKS BUT FAILS TO START
Step 1 Check for loose cylinder head waisted bolts.
If loose, tighten in a crosswise manner with socket spanner No 120040/120050 to 29.50 ft-lb (40
Nm). Using torque gage No. 101900 tighten each bolt, crosswise, three additional 45 degree
increments; then, maintaining crosswise pattern, tighten each bolt an additional 30 degrees (para 3-
19).
3. ENGINE STARTS BUT RUNS UNEVENLY, STALLS, OR SURGES
Step 1. Check adjustment of injection pump.
Adjust injection pump (para 3-13).
Step 2. Check for faulty injectors. Remove and test injectors.
Repair or replace faulty injectors (para 3-15).
Step 3. Check for malfunctioning fuel injection pump.
Replace fuel injection pump (para 3-13).
Step 4. Check for air in the fuel system.
Service fuel feed pump (para 2-32).
Step 5. Check for faulty magnetic pickup.
Replace faulty magnetic pickup (para 3-23).
3-3
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