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10. Plug pump into power and
operate for a few seconds
only to ensure parts are not
rubbing.
Replacing Lower Seal, Impeller
or Volute:
The wet end components may
be repaired or replaced by an
authorized Hydromatic service
facility without compromising the
hazardous location rating to
the pump.
NOTE: Any time the seal is
disturbed, it must be replaced.
Pump
Troubleshooting
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 damaged
4. Incorrect impeller diameter
5. Speed too low
Pump overloads motor.
1. Wrong rotation
2. Specific gravity or viscosity
of liquid 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
im pel ler and volute
3. No axial clearance between
radial cutter and cutter ring
If the cause of the trouble
cannot be determined and
corrected, contact the factory
or an authorized Hydromatic
service facility.
®
5
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