Question about AO Smith A O Smith Motors Century 1hp 115v Thru - Bolt Lomart Motor - Bv90

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Can't get the 4 motor to housing bolts off sp 1515-z-1 esc pump motor without twisting bolt into. have broke one as of now. Trying to replace pump seal. instructs say to remove 4 motor bolts to housing and push out seal from motor end. Looks like I will need 4 new bolts ans a tip to remove the remaining 3 bolts or just twist all 4 bolts off.

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Thank you for posting your question here on

As a rule, when we get those pumps in for repair and the bolts are breaking you notice the motor shaft is severely corroded as well. Often times that will make the unit unrepairable as the new seal won't hold up on a damaged motor shaft. If that is your case you will want to at least consider a new motor and seal for the pump.

If you can remove the bolts with or without breaking you can precede to attempt the repair. Bear in mind you will need to get the busted tips out of the pump housing in order to install the new bolts. That is not an easy task as you are working with a small brass bushing in a thin plastic leg. The removal easily damaged the pump housing. Try to work the bolts back and forth to free the tips. You will then need to get the broken tips out. If all goes well and the shaft is not too bad you should be ok. Anything goes wrong, replace the motor and seal and you'll still save some $$$ compared to a whole new pump.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!


Posted on Sep 12, 2010

  • g_robinson20 Sep 13, 2010

    This is only the second season this motor has been used. The shaft is in perfect condition, no rust , just shiney and brand new looking. The four bolts just do not want to loosen up. Tied for a week gently trying to loosen and using all the tricks of tapping and lubricating. I think this is just a poor design. I f the motor was several years old I would understand.Anyhow my next move is to twist bolts off and try to get four new bolts to replace them with. Thank you. By the way I gave about $219.00 for the motor and did;nt get much use from it. Just bad luck


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