Rebuilding a Proline pool pump motor can save you money and add years of use. It's important, though, to know when the motor is salvageable and when it's more economical to cut your losses and buy a new one. If the motor's copper windings are burned, it's probably not worth the cost and inconvenience of the rebuild. If the windings appear to be intact and undamaged, you can proceed.
Turn off the power to the motor and disengage the timeclock to be sure it doesn't come on while you're working. Remove the motor from the pump and disconnect the wiring from the rear of the motor. Remove the impeller and pump bracket from the front of the motor.
Remove the cover from the starter capacitor. Draw a diagram of the wires connected to the capacitor terminals so you can reconnect the new capacitor in the same manner. Remove the wires and set the old capacitor aside.
Remove the hex-headed bolts at the rear of the motor. These are long, thin bolts that run the length of the motor, holding the rear and front housing sections together. Once the bolts are removed, mark the position of the rear housing in relation to the center section so you can reassemble the two parts to line the bolt holes up exactly.
Use the screw driver to pry off the rear section of the motor. The rear motor bearing sits in a bearing race at the center of the rear housing. When you remove the housing, you will expose the rear shaft, rear bearing and the windings.Take care not to pull off the wiring attached to the rear housing and leading to the terminal plate at the back of the housing.
Tap the front motor shaft gently to loosen it to slide out through the rear of the motor. You should now have the central shaft with the rear bearing at the back, the electromagnet in the middle and the front bearing attached to front shaft out in one piece. Take care not to damage the windings in the motor housing as you pull the shaft out.
Attach the bearing puller to the rear shaft and carefully pull off the rear bearing. Move the bearing puller to the front shaft and pull off the front bearing. Remove the terminal plate from the rear motor housing. You now have all of the replaceable parts ready to match up. These are the starter capacitor, front and rear bearings and the terminal plate.
Write down the information on the motor's identification plate and take all of the replaceable parts to your pool supplier for replacement. With the information from the motor and the parts, you should have no trouble getting the right replacement parts.
Press the new front bearing onto the front motor shaft. Slide the 1-inch lead pipe section over the front shaft and gently tap the bearing into place. Make sure the end of the pipe touches only the interior race on the new bearing so as not to damage the shield holding the ball bearings in place.
Put the shaft assembly back into the motor body. Install the rear bearing into the rear housing. Set the rear housing onto the shaft so the end of the shaft enters the inside bearing race. Gently tap the rear housing onto the shaft, being careful to line up the marks made earlier so the bolt holes line up.
Slide the bolts back through the rear holes and through the body until they come in contact with the threaded holes in the front housing. Hand tighten each bolt. You may have to wiggle each bolt slightly to find the threaded holes because you won't be able to see them through the motor. When all of the bolts are lined up and hand tightened, use the nut driver to finish tightening and pull the housing parts securely together.
Spin the motor shaft to be sure it turns freely on the new bearings. Install the new terminal plate in the rear housing and the new starter capacitor on the side of the motor. Put the capacitor cover back on and reattach the wiring. Run the motor briefly before reinstalling it onto the pump to be sure it is working properly.