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Thread: Hayward ST 1072 died after replacing gaskets

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    Join Date
    Jun 2016
    Location
    Virginia beach va
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    2

    Hayward ST 1072 died after replacing gaskets

    Long time lurker, first time poster. hope you guys can help me out.
    I inherited an old A.O. Smith ST 1072, 3/4 hp, model C48K2N143C2C, Hayward super pump II, 14k gallon pool, one skimmer, one return. there have always been bubbles in the returns. Tiny leak from bottom of pump. have unsuccessfully investigated other common sources of leaks. ordered new gaskets and replaced them yesterday, no issues during installation. although im not sure if i shorted capacitor bc im not sure that i got a screwdriver across the wires (but managed not to shock myself).
    reinstalled motor. Flipped switch and saw poof of smoke and motor died. reset breaker (it had not been tripped) and pump worked for several hours. it shut itself off overnight. tried it again this morning and it would only work for a few minutes before shutting off. now completely dead.
    thoughts:
    #1 i rewired the electrical incorrectly. do not think this is the case. white wire to neutral, red to line, green to ground. its a 115V. it should be noted that the red wire covering was fairly frayed.
    #2 shorted capacitor?
    #3 incorrectly installed gaskets, leading to increased leak and failure to prime the pump fully. i didn't notice any increase in the size of the leak when the pump was running so i dont think this is it.
    does anyone have any suggestions? im leaning towards just replacing the darned thing. thanks in advance!

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    cowboycasey's Avatar
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    Jul 2013
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    Re: Hayward ST 1072 died after replacing gaskets

    Welcome to TFP

    Can you take the motor to a shop and have them test it, sounds like something got shorted and you really do not want a shorted pump connected to your pool...
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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    Join Date
    Jun 2016
    Location
    Virginia beach va
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    Re: Hayward ST 1072 died after replacing gaskets

    i live in a beach community and i'm having a heck of time having anybody look at it because it's the height of their season! i may just replace it, it's old and was leaking anyway. you are right, i shouldn't take chances with electricity and water. it does start to work now but only for a minute or so and it shuts itself off. thanks for the reply.

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    Join Date
    May 2013
    Location
    Massachusetts
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    146

    Re: Hayward ST 1072 died after replacing gaskets

    Amazon.com : A.O. Smith ST1072 3/4 HP, 3450 RPM, 1.5 Service Factor, 56J Frame, Capacitor Start, ODP Enclosure, C-Face Pool Motor : Swimming Pool Water Pumps : Patio, Lawn Garden

    $150 on Amazon. I had this same motor, was loud as heck.

    Don't bother getting repaired, IMO. I replaced and thing works great now.
    25,000 Gallons Inground, Gunite
    DE, Hayward Filter
    Loud pump
    Hayward navigator cleaner, leaf hose suction

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