GREAT PLAINS PA-120DEF Manuale d'uso - Pagina 6
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4. Wipe the cavity clean and wash the bypass poppet
in distilled water.
5. Examine all components and replace as necessary.
6. To replace the poppet O-ring, carefully remove the
O-ring using a small screwdriver or similar tool. Seat
new O-ring on the poppet head.
7. Assemble by placing the bypass poppet assembly
in the cavity. Tighten the plug firmly.
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
housing. 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.
6
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.
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.
REPAIR – P-120DEF
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.