TM 5-4310-451-14
5-3. TROUBLESHOOTING SYMPTOM INDEX.
Troubleshooting
Procedure
Page
AIR COMPRESSOR
Air Discharge Pressure Too Low ..............................................................................................................
5-3
Excessive Oil in Discharge Line................................................................................................................
5-3
Unit Will Not Unload..................................................................................................................................
5-3
ENGINE
Difficult to Start..........................................................................................................................................
5-2
Exhaust Smokes Excessively ...................................................................................................................
5-2
Overheats .................................................................................................................................................
5-3
Performs Poorly ........................................................................................................................................
5-2
Turns Off Prematurely ..............................................................................................................................
5-2
Vibrates Excessively .................................................................................................................................
5-2
Table 5-1. Direct Support and General Support Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE
1.
DIFFICULT TO START/PERFORMS POORLY.
Check for proper valve clearance.
Adjust valve clearance (see paragraph 5-49).
2.
EXHAUST SMOKES EXCESSIVELY.
Check for proper valve clearance.
Adjust valve clearance (see paragraph 5-49).
3.
TURNS OFF PREMATURELY.
Check to see if engine idle speed is too low.
Adjust throttle control (see paragraph 5-54).
4.
VIBRATES EXCESSIVELY.
Step 1.
Check to see if engine idle speed is too low.
Adjust throttle control (see paragraph 5-54).
Step 2.
Check for proper valve clearance.
Adjust valve clearance (see paragraph 5-49).
5-2
