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Changed from model B227se to UST1072 and having issues

The old pool motor for a hayward superpump model#B227SE serial #bx3-18 with a rectangle housing seized up. so i am replacing with a AOsmith UST1072. Both 3/4 hp motors. every site says this is the proper motor swap. but i replaced everything and now when i hit the power switch, it hums and i have to tap it with a mallet to get it to start. Cant hardly believe the capacity would be bad brand new out of the box. Also when it does start, you can hear the metal piece (i think its called a centrifugal)in the back of the motor click against a white plastic piece that is connected to 2 thin copper pieces that touch when the white plastic piece moves up. And it ran for about 1 sec without water in the trap (because it sucked it all out) and it started to smoke a little. its not seized up or anything and there are no obstructions to keep it from turning properly. Didn't know what else to do. any help would be greatly appreciated. ive looked everywhere thanks

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  • shamrock24 May 13, 2013

    after going out and purchasing a Multimeter and checking the volatage going to the motor from the wall switch and it is 220v. But my the issue is that there is a black plastic bolt that you can move up or down and it will say either 115v or 230v. and when it is on 115v it will at least attempt to do something, but on 220v setting it just sets there and does nothing. I have taken pictures of the old motor and new motor and do not know if it is wired up for 220v. the directions on the actual motor are VERY vague.

  • shamrock24 May 15, 2013

    well i'm giving up, having a pool company come over to check it out. noticed that nothing on here was much help. But thanks for trying. Ill let everyone know what the deal was when i find out in case anyone else has the same issue

  • shamrock24 May 22, 2013

    called the pool company and they said the new motor was awaiting a new motor and hopefully this is the issue


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Check your supply voltage. Most new ao smiths come prewired for 220v. If you are running 120 volt supply, There will be a problem in motor starting. It will make unusual noise and most likely shut down shortly.

Posted on May 11, 2013

  • shamrock24 May 11, 2013

    i had a feeling that this would be the issue. i am running 120v. I have only ran the motor for about 3 seconds continuously because i'm afraid of burning the motor up. (no water in the pool currently)I know it is supposed to say on the label how to switch over to the 120v, but the only thing i can make any sense of is there is a plastic bolt that i have to switch from 220v to 120v....would you know if i have to do any rewiring? thank you very much for the response


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Posted on Jan 02, 2017

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SOURCE: 1 HP electric motor hums but not turning.

check for a re-set button somewhere on the motor housing.

Posted on May 04, 2010

  • 1305 Answers


There may debris that has passed by the strainer basket and jammed the pump. I've personally got the world's worse pool... it's right next to a deadora tree with small pine type needles...they always get by the strainer basket and sometimes lodge in the pump.
To remedy the this, I take the protective cap off the exposed end of the motor and turn the shaft back and forth with a crescent wrench.
This frees the shaft up, then turn the switch on. You may need to do this a few times.
Also, with the pump off, remove the strainer and reach into the intake and see if anything is lodged in the opening... feel around with your finger to see if you can feel any debris.
If this doesn't solve it, you'll need to unbolt the motor with the pump impeller free from the basket housing. Once free clean the intake and surrounding area of all debris.
Being careful with the o-rings, reinstall. that should get you up and running...
let me know how it goes...

Posted on Jul 10, 2009

  • 1378 Answers

SOURCE: Low/High Switch wiring for Hayward Superpump

I do not read anywhere that you have a 230V DPDT switch which you will need in order to select the high or low speed. You will have 6 terminalas on the switch. Line connections usually go to the middle set. Put put sides of one pole to the common terminal and put one of the other posts to the hi and the other to the low terminal. I prefer to use am on-off-on switch so the switch in the middle turns off the pump. Flip it one way for hi and the other for low. If you post your stock number from the two-speed motor I could give you a more accurate diagram if you need it. Generally, 1 is common, 2 hi and 3/4 low.

Posted on Apr 26, 2010

  • 8404 Answers

SOURCE: A. O. Smith 1 1/2 hp. motor Type SP. Humms then

You have a failing start/run capacitor. Take the motor to your pool supply place for repair.

Posted on Aug 04, 2010

  • 640 Answers

SOURCE: Model SP15921TLNP 1HP pool pump.

Are you sure it has a capacitor. I say this because capacitance motors tend to be fan motors. If there is an integral capacitor you should be able to find its size on the label plate for the motor.
Most motors are not capacitance though.

Posted on Jul 08, 2011

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