TM 10-4610-232-12
Table 4-2. Unit Troubleshooting Guide (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4. Check low pressure air lines and components for leaks.
(a) Replace/repair leaking components (para. 4-24).
(b) Notify direct support maintenance.
Step 5. Notify direct support maintenance.
7. Air compressor on at more than 1850 psig (12747 kPa), or is not on at less than 1400 psig (9646 kPa).
Notify direct support maintenance.
8. Air compressor oil has water in it (looks milky).
Step 1. Visually confirm malfunction.
Change oil (para. 4-78).
Step 2. Notify operators to check daily for a build up of water in the oil.
If the problem keeps reoccurring on a frequent basis, replace the air compressor (para. 4-80) and have
direct support maintenance repair it.
HIGH PRESSURE PUMP.
1. High pressure pump/motor noisy.
Step 1. Check pump and motor mounting hardware.
Tighten, if loose.
Step 2. Check belt guard mounting hardware.
Tighten, if loose.
Step 3. Check skid stable levels for pressure level.
(a) Lower the stable level pressure (equally on each stable level) until noise diminishes
(b) Notify direct support maintenance.
2. High pressure pump/motor belts are noisy or have a burning smell.
Step 1. Check the belt for wear.
Replace, if worn (para. 4-81).
Step 2. Check drive belt tension.
Adjust to correct tension (para. 4-81).
3. High pressure pump discharge pressure won’t go to 900 psig (6201 kPa).
Step 1. Check drive belt tension.
(a) Adjust to correct tension (para. 4-81).
(b) Notify direct support maintenance.
4. Feed high pressure alarm on at Iess than 900 psig (6201 kPa) or is not on and the RO system pressure is more than
960 psig (6614 kPa).
CAUTION
The ROWPU can continue in operation but the operator needs to monitor operation to
ensure the system pressure does not exceed 900 psig by opening the pressure
control valve.
Notify direct support maintenance.
5. High pressure pump and piping pulsating or vibrating moderate to severe. Pump may be making sharp hammering
sound.
Step 1. Check mounting hardware for the pump and motor.
(a) Tighten if loose.
(b) If problem continues notify direct support maintenance.
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