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Installation
NOTICE: Pump motor is equipped with carbon brushes
with a normal operating life of about 300 hours. One
extra set of brushes is included. Replacement brushes are
available from your dealer. Motor brushes not included
in warranty.
Fire hazard. Incorrectly mounted brushes
may cause fire. Be sure curve on end of brush matches
curve on commutator.
LUBRICATION
Motor is lubricated at factory for life of bearings. Pump
seal is water cooled and self lubricating.
PUMP SERVICE
Motor has auto-reset thermal overload. If motor
overheats, overload will cut off power to prevent
damage and will reset after motor cools. If overload trips
repeatedly, check pump for cause (low voltage, clogged
impeller, etc.).
Hazardous voltage. Can shock, burn, or
cause death. Disconnect motor from electrical power
before servicing pump.
Always replace both brushes - to avoid fire hazard,
never replace just one.
Seal Changing Procedure
Hazardous voltage. Unplug pump before
continuing.
1. Unplug the pump from the outlet and remove all
piping or hoses from the pump.
2. To avoid breaking the brushes when you remove or
replace the motor shaft, remove the motor brushes
(see "Brush Changing Procedure", Page 7, Steps 1
and 2). Put the brushes where they will not get lost
or damaged while you proceed.
3. Remove 4 screws from the back of the pump body
(Key No. 1, Page 8) and remove the pump body
from the motor. Remove the old Square-cut O-Ring
(Key No. 4C) from the assembly.
4. Unscrew the impeller (Key No. 4A) from the motor
shaft and discard it.
5. Pull the seal plate (Key No. 5) from the motor shaft.
6. Turn the seal plate face down (See Figure 4A)
and use a screwdriver or small tube to push the
stationary seal half out of the seal plate (Figure 4B).
7. Place a cardboard washer over the seal face to
protect it and use a tube to push the stationary seal
half into the seal plate until it seats (Figure 4C). Be
sure you don't scratch or mar the polished face of
the seal. Also, keep your hands away from the seal
face to keep dirt and grease off of it.
A
B
D
Figure 4: Seal Changing Procedure
8. Use the cardboard washer and tube to push the
rotating half of the seal into the new impeller,
polished face out (Figure 4D). Be sure you don't
scratch or mar the polished face of the seal. Also,
keep your hands away from the seal face to keep
dirt and grease off of it.
9. CAREFULLY slide the seal plate back onto the motor
shaft, making sure that you don't chip or scratch the
seal face in the process.
10. Thread the new impeller onto the motor shaft,
making sure that you don't chip or scratch the seal
face in the process.
11. Reinstall the motor shaft in the motor.
12. Install the new square-cut O-ring on the seal plate.
13. Bring the impeller/motor assembly up to the pump
body and insert the impeller and seal plate into the
pump body.
14. Install the 4 body screws (be sure to reinstall the
handle on the upper screws) and tighten them
securely.
15. Replace the motor brushes (see "Brush Changing
Procedure", Page 7, Steps 4, 5, and 6).
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