Question about AO Smith 1 1/2 HP 115/230V 56C Replacement Motor

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Can I replace the 1.0 hp A.O. Smith pump motor (Hayward SP1580FP) with a 1/2 hp motor (like that found on the Hayward SP1750)?

I wish to cut down on my gpm and power useage without having to purchase a complete pump and motor

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  • 426 Answers

Only if it will carry the load

Posted on Nov 06, 2013


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Posted on Jan 02, 2017

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SOURCE: just replaced a rheem oem 1/6 hp motor 3 wires

green wire cut off if motor is held on with metal bracket.white/yellow to contactor,black to other side contactor. brown/wht to fan on capacitor,brown to common on contactor NOT HERM.

Posted on Jul 10, 2009

  • 717 Answers

SOURCE: I wish to replace the existing pump seal ( an 8"

What brand of pump? The shaft of the motor doesn't come out of the middle of the motor unless you take the motor apart and there are no o-rings in the middle of a motor

Posted on Feb 15, 2011

  • 3740 Answers


Hi and welcome to FixYa, I am Kelly

Black is High/ 2, Red is Low /4 and white is L2 / COM (115 VAC connection) Also shown in Diagrm 69 below link as common

Usually on the side of an AO Smith motor there is a nameplate with a diagram of the connections.

Download this file:

See Diagram CD 69, CD 39, CD 41

Thanks for choosing FixYa,

Posted on Apr 02, 2011

  • 1400 Answers

SOURCE: just replaced a Hayward 2hp pool motor with a OA

No there is no switch in the motor.Correct voltage is done by hooking up incoming power to a combination of internal wires or contacts.

There should be a wiring diagram on the cover where the hookup is.Or on the outside case of the motor.
The high and low speed doesnt make sence to me.Check the rpm of the motor it should be one rpm continueous.
Unless this is a Hvac motor and not a pool pump motor.Possible you may have been sold the wrong motor.
Usually a pool pump is 115 volts 1 speed and 1 rpm continuos duty.Unless you specify 230 volts.

Posted on Aug 09, 2011

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1 Answer

How do I break down pool motor aol 1-1/2 hp

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A.O. Smith is just the motor. If your pump is a Hayward any pool store can help. Take your old one in and they can match it. Be sure to get a new seal while your at it, It should be a #201 seal. If you pull the whole motor and pump face the pool shop can probally do the work for you and gennerally don't charge except for the parts. Good luck

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