5
6. Thoroughly clean housing (8)
and other parts and install
new stator.
7. Connect leads through housing
bore and tuck leads back
behind the stator windings to
prevent rubbing on rotor.
Use
only twist on wire nuts to
connect wires.
8. If the ball bearing (57) is
rusted or feels rough when
turned, it should be replaced.
Remove hex head capscrews
(31), lockwashers (44), retainer
plate (56) and pull the bearing
(57) and rotor assembly (15)
from the bearing cap (9).
Remove hex head capscrew
(59) and washer (58) and press
the bearing off the shaft. Install
the new bearing by pressing on
inner face only.
Pressing on
the outer face will ruin
the bearing.
9. In reassembly replace any
O-rings that are defective. Use
Parker O-ring Lub on all O-
rings for easy assembly and to
prevent cutting.
10.Completely reassemble and fill
with oil as described under
Replacing Seals
.
11.Always run pump for a few
seconds after assembly work
to be sure all parts run
smoothly and are correctly
adjusted before replacing in
sump. Check again for correct
rotation. Pump should rotate
counterclockwise when viewed
from the suction.
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
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
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.