TM 5-4310-389-14
Table 4-1. Direct Support Troubleshooting Procedures (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
COMPRESSOR (Contd)
23. Engine does not run smoothly.
Step 1.
Engine/compressor mounts broken or loose.
Tighten or replace as required.
24. Engine overheats or backfires.
Step 1.
Fuel delivery wrong (fuel timing).
Adjust as required.
25. No alternator output.
Step 1.
Check for defective regulator.
Repair or replace regulator.
Step 2.
Inspect for defective brushes.
Repair or replace brushes.
Step 3.
Check for open field diode.
Replace diode.
Step 4. Check for open rotor.
Replace rotor.
26. Low alternator output.
Step 1.
Check for defective regulator.
Replace regulator.
Step 2.
Inspect for worn brushes.
Replace brushes.
Step 3.
Grounded/shorted rotor windings.
Replace rotor.
Step 4.
Grounded/shorted stator windings.
Replace stator.
Step 5.
Shorted/open rectifier diode.
Replace diode.
27. Noisy alternator.
Step 1.
Loose drive pulley.
Tighten pulley.
Step 2.
Cracked or damaged housing.
Replace alternator.
Step 3.
Worn bearings.
Replace bearings.
4-5
