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TM 10-4320-307-10
Table 3-1. Operator/Crew Troubleshooting (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 5.
Check for sufficient suction pressure.
Increase suction pressure if necessary.
Step 6.
Check discharge pressure.
Adjust discharge pressure as required.
12.
NOISY PUMP OPERATION
Step 1.
Check that pump is securely mounted to skid.
If pump is loose, tighten bolts.
Step 2.
Check that engine speed is not set too high causing pump cavitation.
Reduce engine speed to meet suction capability.
Step 3.
Check adequate suction pressure to prevent cavitation.
Increase suction pressure if necessary.
Step 4.
Check pump free rotation by hand.
Stop pump and notify unit maintenance if cause of problem cannot immediately be identified.
13.
PUMP OVERHEATS
Step 1.
Check discharge pressure.
Open discharge and suction valves.
Step 2.
Check suction pipe for obstruction.
If there is an obstruction, remove.
Step 3.
Check for leaks that cause loss of suction.
If leaks are present, replace gasket and/or piping.
14. PUMP DISCHARGE PRESSURE LOW
Step 1.
Check that engine is running at rated speed.
Increase engine speed.
Step 2.
Check that suction valve is fully open.
Open suction valve.
Step 3.
Check adequate suction pressure.
Step 4.
Check for leaks in piping.
If a Category Class III leak is detected, replace gasket and/or piping.
Step 5.
Check for loose connection in suction pipe.
Tighten loose connections.
3-8
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