by Rob Cox, May 26, 2012
If your pool pump motor is screaming and shrieking, it's begging for attention. Or perhaps your motor has given up the ghost altogether. In either case, you have a few options.
You could take the motor to a local electric motor shop, and have them rebuild it - this general involves replacing the bearings and the shaft seal, maybe a fresh coat of paint on the motor casing. This cost can vary from area to area, but let's assume that this option will cost you $125 +/-.
Rebuilding your pump motor can be a good option, especially for a relatively new pump. The only problem with rebuilding a motor is that the only thing being "rebuilt" is the bearings and the seal. The other parts of your pump motor are still the same age. Windings, Capacitor, Switches, etc - could cause problems later on, and the warranty on a rebuild job is usually only 30 days.
Option #2 is to replace the pump, from front to back, motor and "wet end". This could be a reasonable option if your old pump was undersized and underpowered, or if you want to (or are required to) switch to a dual-speed or variable speed pool pump. Of course, this is the most expensive option, running anywhere from $350 to $900, depending on the pump model and features.
Option #3 is the subject of this blog post - replace the motor. When we speak of the motor, we refer only to the electrical motor attached to the "wet end", where the water is pumped through. Modern pool pump motors are now more efficient than ever, and if you wanted to, you could switch to a two-speed motor, although you will need to replace the time clock, and add the 4th wire - the low speed power wire.
To replace your pool pump motor, you'll need to have a few items on hand:
The job of replacing a motor on a different pump is not so different, really. Most modern plastic pumps don't utilize a stub shaft, or a keyed shaft motor. The most common question I hear from pool owners replacing Hayward, Pentair or Jandy pump motors is how to remove the impeller. The trick to this is to hold that shaft stationary, in the rear of the motor, while unthreading the impeller from the opposite end of the motor shaft. Once the impeller is removed, you can then remove the seal plate from the old motor and reinstall it onto the new motor, using a new shaft seal.
I hope this has been helpful to those who want to save a few dollars and replace their own pumps, or for younger pool guys who dont often come across the old style Anthony bronze pump (made by Sta-Rite for Anthony).
If you have any questions on your pool pump motor replacement, hit the link at the top of the page and send me an email, or leave a comment below.
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