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 TM 55-1905-223-24-13
Table 2-2. Troubleshooting - CONT
Malfunction
Test or Inspection
Corrective Action
2.
Not enough pressure.
STEP 1.
Check for low motor speed.
Make sure motor is directly across-the-line and receiving full voltage
and frequency.
STEP 2.
Check for air leaks in suction piping.
Shut off or plug inlet and put line under pressure. A drop in pressure
gauge reading indicates a leak. Locate and correct leak.
3.
Pump operates for short time then stops.
STEP 1.
Check for loss of prime.
a.
Fill pump and suction pipe completely with liquid.
b.
Correct leaks in suction pipe, joints and fittings.
c.
Vent casing to remove accumulated air.
STEP 2.
Check to see if suction Lift is too high.
Remove obstructions from inlet (Item 3, PMCS).
4.
Pump draws excess amperage.
STEP 1.
Check for distorted casing.
Make sure there is no contact between impeller and casing.
STEP 2.
Check to see if motor speed is too high.
Make sure there is proper voltage and frequency to motor.
5.
Pump noisy or vibrates.
STEP 1.
Check motor balance.
a.
Disconnect motor from pump (para. 2-13) and operate motor alone.
b.
Replace pump (para. 2-14).
c.
Replace motor (para. 2-13).
d.
Make sure lubricants are of proper grade. See LO 55-1905-223-12.
STEP 2.
Check for misalignment.
Align pump and motor (Item 1, PMCS).
SECTION V. UNIT MAINTENANCE PROCEDURES
2-11. General. This section provides unit maintenance for the bilge/ballast pump. The tasks are for removal and
replacement of components.
2-5
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