TM 10-4610-232-12
Table 3-1. Operator Troubleshooting Guide (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4.
Check inlet air filter.
Change if plugged or dirty.
Step 5.
Isolate air leak.
Close the air block valves on both air manifolds, one by one. If results are obtained, operate with that
part of the system on manual.
Step 6.
Switch to manual valve operation.
Refer to para. 2-34.
Step 7.
Notify unit maintenance.
13. Air compressor overheats. Air compressor fan does not turn.
Step 1.
Switch to manual valve operation. Refer to para. 2-34.
Step 2.
Notify unit maintenance. Do not operate air compressor.
14. Air compressor oil looks milky.
Step 1.
Notify unit maintenance.
15. Air compressor motor runs but air compressor does not.
Step 1.
Notify unit maintenance.
AIR SUPPLY.
NOTE
If, at anytime, the air supply is not enough to operate the ROWPU, switch to manual valve
operation. Refer to para. 2-34 and notify unit maintenance.
1. System air pressure is less than 85 psig (586 kPa).
Step 1.
Check air COMPRESSOR OFF/ON switch.
Turn ON.
Step 2.
Check for open air drain valves.
Close valves.
Step 3.
Check air system low pressure regulator.
Adjust pressure up to 85 to 90 psig (586 to 620 kPa).
Step 4.
Isolate leak.
Close block valves on both air manifolds, one by one. If results are obtained, operate with that part of
system on manual. Refer to para. 2-34 and notify unit maintenance.
Step 5.
Notify unit maintenance.
2. System air pressure is greater than 95 psig (655 kPa).
Step 1.
Check air system low pressure regulator.
Adjust pressure to 85 to 90 psig (586 to 620 kPa).
NOTE
System air pressure goes down very slowly. The process can be sped up by opening and
closing an air manifold drain valve until the pressure drops.
Step 2.
Notify unit maintenance.
3. Air system low pressure relief valve leaks air.
Step 1.
Check to see that air pressure is not more than 85 to 90 psig (586 to 620 kPa).
Step 2.
Notify unit maintenance.
4. Air system high pressure relief valve leaks air.
Step 1.
Notify unit maintenance.
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