TM 5-4310-386-14
Table 4-2. Unit Troubleshooting Procedures (Cont).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
11. ENGINE OVERHEATS OR BACKFIRES.
Step 1. Check to see if crankcase oil level is too low.
Fill to proper level.
Step 2. Check to see if belts are slipping on engine cooling fan.
Adjust (para. 4-41).
Step 3. Check to see if fuel in tank is of poor grade.
Drain. Replace.
Step 4. Check to see if cooling air ducting is dirty.
Clean cooling air ducting (para. 4-42).
NOTE
When engine stops suddenly with compressor engaged and safety bypass off, engine can be
shut down by low compressor oil pressure or compressor 4th stage head temperature.
12. ENGINE STOPS SUDDENLY.
Step 1. Check to see if fuel tank is empty.
Add fuel as required.
Step 2. Check crankcase oil level.
Add oil, as required.
Step 3. Check cylinder head temperature gauge.
Let engine cool. Check air cooling ducting fins (para. 4-42).
Step 4. Restart engine and check oil pressure.
If low, notify Direct Support Maintenance.
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