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 TM 55-1905-223-24-3
Table 2-2. Troubleshooting-Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP 6. Check for fuel pump not turning.
a. Check tachometer shaft for rotation while cranking.
b. If tachometer shaft is not turning, remove the fuel pump and check to see if the accessory drive shaft is
turning (para. 2-37).
c. If turning, replace fuel pump (para. 2-37).
d. If not turning, refer to direct support maintenance for corrective action.
STEP 7. Check for excessive intake air restriction.
Refer to Malfunction 14, Step 3.
STEP 8. Check for excessive exhaust restriction.
Refer to Malfunction 14, Step 4.
18. Engine hard to start or will not start (exhaust smoke present).
STEP 1. Check for low engine cranking speed (below 150 rpm).
Check engine cranking rpm.
STEP 2. Check coolant heater (para. 2-36).
Repair coolant heater (para. 2-36).
STEP 3. Check to see if fuel filter plugged.
Replace fuel filter (para. 2-31).
STEP 4. Check for air in the fuel system.
a. Tighten all fuel line connections.
b. Tighten fuel filters.
c. Check for air leaks at fuel pump:
(1) Run the engine.
(2) Loosen the fuel outlet line at the shutoff valve.
(3) If air bubbles continue after initial release of air, replace the fuel pump (para. 2-37).
STEP 5. Check to see if fuel suction line is restricted.
Inspect fuel lines for restriction or damage. Correct as required. Refer to Malfunction 17, Step 4.
STEP 6. Check air intake system for restriction.
Refer to Malfunction 14, Step 3.
STEP 7. Check for contaminated fuel.
If contaminated drain, clean, and replace.
2-39
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