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NOTE: When applying power,
be sure the pump is restrained
from turning by holding the
pump at the motor housing, or by
clamping it in a holding fixture.
CAUTION: Always keep hands
away from the pump cutter
area after the circuit breaker
is reconnected.
Pump
Troubleshooting
Below is a list of troubles and
their probable causes.
No liquid delivered.
1. Pump air bound
2. Discharge head too high
3. Pump or piping plugged
4. Wrong rotation
5. Speed too low
Insufficient liquid delivered.
1. Discharge head too high
2. Impeller or cutters partially
plugged or damaged
3. Wrong rotation
4. Incorrect diameter impeller
5. Speed too low
Insufficient discharge pressure.
1. Wrong rotation
2. Air or gases in liquid
3. Impeller damages
4. Incorrect impeller diameter
5. Speed too low
Pump overloads motor.
1. Wrong rotation
2. Specific gravity or viscosity
of liq uid too high
3. Speed too high
4. Head lower than rating,
pumping too much liquid
5. Pump clogged
6. Defective bearings
7. Defective impeller
Pump is noisy.
1. Defective bearings
2. No axial clearance between
impeller and volute
3. No axial clearance between
cutter ring and axial cutter
4. No diametral clearance
between radial cutter and
cutter ring
If the cause of the trouble cannot
be determined and corrected as
outlined above, contact your
nearest factory representative.
5
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