6
8. Examine the bearings on
the shaft/rotor assembly. If
when rotated they feel rough,
replace. When reinstalling
new bearings, press only on
the inner ring of the bearing or
damage may occur.
9. Replace the wave washer into
the upper bearing pocket in the
motor housing, then reinstall
the rotor and shaft assembly.
10. Follow the previously outlined
steps to reassemble the pump
from this point.
11. Always run pump for a
few seconds after assembly
work to be sure all parts run
smoothly before replacing it
in the sump. Check again for
correct rotation. Pump should
rotate counterclockwise when
viewed from the suction end.
NOTE: When applying pow er,
be sure the pump is restrained
from turning by holding the
pump at the motor hous ing,
or by clamping it in a holding
fixture.
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 de liv ered
1. Discharge head too high
2. Impeller or cutters impartially
plugged or damaged
3. Wrong rotation
4. Incorrect diameter im pel ler
5. Speed too low
Insufficient discharge pressure
1. Wrong rotation
2. Air or gases in liquid
3. Impeller damages
4. Incorrect impeller di am e ter
5. Speed too low
Pump overloads motor
1. Wrong rotation
2. Specific gravity or vis cos i ty of
liquid too high
3. Speed too high
4. Head lower than rat ing,
pumping too much liquid
5. Pump clogged
6. Defective bearings
7. Defective impeller
Pump is noisy
1. Defective bearings
2. No axial clearance be tween
impeller and volute
3. No diametral clear ance
between radial cutter and cutter
ring
If the cause of the trouble cannot
be determined and cor rect ed
as outlined above, con tact your
nearest factory rep re sen ta tive.
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