Hayward 1 1/2 Super Pump humming noise

[Madty]

Thanks Al- I understand...uh, a little. I went out a little while ago and it was quiet. Then I heard a little noise- I guess just wait and see. I know everythings turning because the water is pumping fine.

Thanks again

[thepoolman1]

Sounds like a rear bearing noise to me, especially if the motor is a Magnatek/Century. The rear bearing cup in these motors is slightly large, allowing some lateral (side-to-side, up-and-down) movement. Get something stuck in the impeller and it gets out of balance. This can increase the tendency for the motor shaft to move and you will hear it as a "rum, rum, rum, etc" noise. Eventually the bearing cup gets larger and the noise worse.

Got this information from a motor shop many, many years ago. If it is a Magnatek/Century motor, the quick fix is to remove the end bell, wrap a couple of turns of teflon tape around the bearing, re-assemble the motor. Sound should be gone. Has worked every time for me. This can be done with A.O.Smith motors also, but they are more difficult to take apart due to the centrifugal switch on the end of the motor shaft. On re-assembly the switch contacts have to be adjusted properly also and the end bell seated properly and the through-bolts on both brands tightened evenly so the bearing is aligned properly.

[Poconos]

That would certainly explain why the beat note is now loud enough to hear. Great information for the archives in the brain.
Thanks.
Al