Replace Motor
1. Disconnect pump from power and flush.
2. Remove the four screws holding the motor and handle to
the housing.
3. Lift the motor from the housing and drive shaft.
4. Remove the motor shaft adapter from the drive shaft.
5. Assemble by reversing the steps above. Make sure the
motor is properly seated against the motor adapter seal.
Torque the four screws to 75 to 100 in-lbs.
Replace Switch
1. Disconnect pump from power and flush.
2. Remove the cover assembly on the side of the motor.
3. Press in on the sides of the switch. Push the switch from
the switch box.
NOTE: Before disconnecting wires, note their positions on the
switch. Connect to the new switch in the same positions.
4. Disconnect the terminal wires from the back of the old
switch.
5. Install the new switch by reversing steps above. Carefully
position wires in switch box before replacing cover.
6. Install cover assembly and tighten screws until snug. Do
not overtighten.
Replace the Drive Shaft or Motor Shaft Seal
Follow these steps to remove the drive shaft and motor
shaft seal.
1. Disconnect pump from power and flush.
2. Remove the motor as described above.
3. Carefully slide the drive shaft from the motor and the hous-
ing. Note the position of the motor shaft washer.
4. Carefully pry the motor shaft seal from the housing with a
flat-bladed screwdriver.
NOTE: While removing the motor shaft seal, note carefully the
orientation and which side of the seal faces the motor.
The new seal must be installed with the same orientation.
5. Inspect the drive shaft, motor shaft washer, motor shaft
seal, and bearings for wear. Replace, as necessary.
Follow these steps to install the drive shaft and motor
shaft seal.
1. Press the new motor shaft seal into the housing with the
same orientation as the old seal.
2. Position the motor shaft washer on the seal. Slide the
notched end of the drive shaft into place in the housing.
3. Align the drive shaft with the motor adapter. When properly
aligned, the drive shaft will slip into place with the motor
against the housing.
4. During assembly, make sure the motor is properly seated
against the motor adapter seal and the housing.
6
5. Replace the screws to fasten the motor and handle to the
housing. Use the two longer screws to secure the handle.
Torque to 75 to 100 in-lbs.
Replace Gears or Drive Key
Follow these steps to remove the gears and drive key.
1. Disconnect pump from power and flush thoroughly.
2. Remove the coverplate and O-ring from the housing.
3. Remove the drive key and gears from the housing.
4. Inspect gears and key for wear or damage. Replace, as
necessary. Clean cavity.
Follow the steps below to install gears and drive key.
1. Place a gear over the drive shaft.
2. Align the slotted drive shaft end with the gear.
3. Place the other gear in the housing. Turn the gears to make
sure they do not bind. Carefully place the key in the slot.
4. Replace the O-ring and coverplate. Torque screws to 25
to 35 in-lbs.
Read, understand and follow all safety instructions given at the
front of this manual.
During repair, carefully inspect all parts for wear or damage and
replace, as necessary. Check O-rings and seals for breakage,
wear, and signs of deterioration, such as swelling.
Replace Fuse
1. Locate the fuse holder on the power cord.
2. To remove fuse, push the ends together and twist. Replace
the blown fuse.
Clean or Replace Strainer
1. Disconnect pump from power and flush.
2. Remove the coverplate and O-ring from the housing.
3. Remove the inlet strainer.
4. Clean or replace the strainer. Install again.
5. Install the coverplate and O-ring. Torque screws to 25 to
35 in-lbs.
Clean or Replace Inlet Fitting
1. Disconnect pump from power and flush.
2. Remove the inlet fitting from the pump housing.
3. Clean or replace the inlet fitting. Install again. Torque screws
to 45 to 50 in-lbs.
REPAIR – P-120DEF
