Impeller Replacement - Pentair Myers MSC150 Series Owner's Manual

Impeller Replacement

Risk of electric shock. Can shock,
burn or kill. To reduce the risk of hazardous
or fatal electrical shock, follow instructions A
through B, below:
A. This pump has an approved 3-conductor power
cord with 3-prong, grounding-type plug. Connect
the pump only to a properly grounded, 3-prong
outlet. If the sump pump circuit has a 2-prong
outlet, replace it with a grounded 3-prong outlet
installed according to code.
First: Turn off power to the pump, disconnect
the discharge piping, and lift the pump out of
the sump BY THE HANDLE ON TOP OF THE
MOTOR (not by the cord).
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Step 1: A. Invert the pump and secure it from
tipping. B. Remove the three screws holding the
motor to the base and lift the base off the motor.
C. Do not remove the seal plate,
as the motor is full of oil and will spill.
Step 2: Hold the motor shaft with a screwdriver
and unscrew the impeller as shown.
NOTICE: The impeller has a left-hand thread, so
it loosens to the right (
Base
Seal Plate
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).
For parts or assistance, call Customer Service at 1-888-987-8677
B. Unplug the pump before handling or servicing
it. If your basement floor is wet, turn off all power
before walking on it. If the shut-off box is in the
basement, call your electric company or hydro
authority to shut off the service to the house, or
call your local fire department for instructions.
After turning off the power, remove the pump for
service.
Step 3: Thread the new impeller onto the motor
shaft as shown (left-hand thread – tightens to the
left ).
Step 4: Re-mount the base on the motor. Be
sure to mount it so that the switch is clear of the
discharge and all other obstructions in the sump.
Last: Run the pump through one complete cycle
after it is assembled and reinstalled. It should
operate correctly and you should not hear any
sounds of scraping or dragging from the pump.
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