TM 10-4610-215-24
TM 08580A-24/2
Table 2-3. Troubleshooting (ROWPU)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
PUMP MOTORS
1. ELECTRIC MOTOR DRIVEN PUMP FAILS TO RUN.
WARNING
ELECTRICAL HIGH VOLTAGE
Electrical high voltage can cause serious injury or death. Some
tests performed in troubleshooting require power to be
connected. Always take proper measures to ensure personal
safety.
ROWPU piping and equipment can contain extremely high
pressure during and after operation. If this pressure is not
relieved before working on these pipes or equipment, serious
injury or death may occur. Be sure to open all drains and vents
before beginning any disassembly.
CAUTION
Make sure power is disconnected from junction box in order to
prevent damage to equipment.
NOTE
Continuity and tests for shorts shall be done with power
disconnected from the generator to the junction box.
Step 1.
Visually inspect motor/pump assembly for damage which may prevent it from working.
Step 2.
Remove fan cover and fan from motor. Using a strap wrench on rotor shaft, rotate rotor to
determine if motor/pump is frozen due to mechanical failure or jammed impeller.
a. If motor/pump is frozen and will not turn, replace motor/pump assembly.
b. If motor/pump rotates freely, perform continuity and short tests.
Step 3. Open conduit box on pump motor.
Step 4.
Inspect contacts and wires for burned, cracked, or loose connections.
NOTE
Tag and mark each wire for ease of reassembly.
Step 5.
Disconnect cable wires from motor.
Step 6.
Using a multimeter, check motor wiring for shorts or opens.
a. If short or open exists in motor wiring, replace motor assembly.
b. If no short or open is found, continue with electrical checks.
NOTE
For on–board pump motors, go to Step 8.
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