TM 5-4310-389-14
Table 4-1. Direct Support Troubleshooting Procedures (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
COMPRESSOR (Contd)
6.
Compressor does not attain final pressure.
Step 1.
Check final stage safety valve.
Replace.
Step 2.
Check drain valves and stage safety.
Clean, repair, or replace.
Step 3.
Check intermediate stage pressures.
Replace valves/rings as necessary.
7.
Excessive vibration of unit.
Step 1.
Fuel delivery (timing off).
Check, adjust if necessary.
Step 2.
Floating frame cracked.
Weld, replace as necessary.
8.
Condensate drain not draining (cold weather).
Step 1.
Condensate heater inoperative.
Test circuit and element, replace if necessary.
9.
No oil pressure.
Step 1.
Check oil pump.
Test and service as required.
Step 2.
Check regulator.
Clean and adjust as necessary. Replace if required.
10. Compressor output insufficient.
Step 1.
Check engine rpm.
Adjust as required.
Step 2.
Check compressor valves.
Replace as necessary.
Step 3.
Check compressor rings.
Replace as necessary.
11. Safety valves between stages releasing pressure.
Step 1.
Check stage valves.
Replace as necessary.
Step 2.
Check stage safety valves.
Adjust; replace as necessary.
4-2
