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TM 5-4320-313-14
4-9.
TROUBLESHOOTING - Continued.
Table 4-2. Unit Maintenance Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE CRANKS BUT FAILS TO START - Continued.
WARNING
Cleaning solvent, Federal Specification P-D-680, is toxic and flammable. Use only in a well-ventilated
area. Avoid prolonged breathing of fumes. Keep solvent away from flames. Do not use in excessive
amounts. Avoid skin contact. Do not smoke.
Step 5. If engine does not start, remove vent valve. Check vent valve by shaking for free movement of internal
valve ball.
If necessary, clean with cleaning solvent and allow to dry. If unserviceable, notify direct support maintenance.
Step 6. Check starting procedures under prevailing conditions.
If starting procedures have been performed correctly but engine still fails to start, notify direct support
maintenance.
2. ENGINE POWER OUTPUT IS SLOW AND RUNS UNSTEADILY.
Step 1. Check window of air filter indicator for red band indicating blocked air filter.
If red band appears in window of air filter indicator, replace air filter element (paragraph 4-10).
4-6
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