Question about Hayward 1.5 Hp Northstar High Performance Pump

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Can't get motor and impeller assembly off pump

After I spin off the outer housing of the motor/pump assembly I can see nothing holding the empeller housing in place on the pump housing, but I can't ge it to release. I don't see any screw,bolt or anything holding it in place. Any suggestions??


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The impeller unthreads counter clockwise off the shaft of the motor. on the back of the motor under a plug or the plastic cap there is the shaft of the motor with a slot for a standard screwdriver. put the biggest screwdriver you can find in there and turn on the impeller as hard as you can. After some years the impeller can get rusted onto the threads of the shaft and you will need to break it to get it off. (sometimes they just don't come off)

Posted on Feb 26, 2009

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How to remove impeller from a.o. smith

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Need to replace pump Impeller on A.O. Smith Century Centurion Pool & Spa Duty Switchless Pump

To get to the Impeller you need to remove a series of bolts, or a large clamp, that holds the two halves of the pump together. Once you do that, if their is a diffuser (housing that goes over the impeller), remove it. To remove the impeller, you need to lock the motor shaft. You can do this a couple different ways depending on the motor. There will either be a small cap that grants access to the motor shaft on the back of the motor, or you remove a larger housing that grants access to the wiring and other components in the back of the motor. If it's the small cap, then you can hold the shaft with a wrench. If it's the larger housing, then you can slip a wrench (probably 7/16") under the thermal overload switch and onto the shaft to lock it in place. Now you can unscrew the impeller. Check to see if the impeller has a screw in the center. If so remove this first. It will be reverse thread. The impeller should spin off counter clockwise. If the impeller is very tight, be careful not to damage it. If you don't have an impeller wrench, I strap wrench, or very large locking pliers with a rag around the impeller works well. Hope this helps. If you need further assistance post a reply in the comments, and don't hesitate to leave a good thumb rating if you found this helpful. Thanks, and good Luck!

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Replacing motor only how do I unassemble motor from empeller

In order to remove the motor, first turn the motor locking ring. This holds the too halves of the pump together. There should be a small tab you have to press in, then grab the round handle, and spin the outer sleeve to unlock. Once you do this the back half of the can be pulled away. This can be very hard sometimes. If the pump and motor still work, you can flip the switch on for a sec or two, and it will pop the back half away from the front half. If the motor is not working then you'll just have to twist, wiggle and pull till you get it apart. After this make sure the power is off, breaker off, etc. and you can remove two screw from the plastic cover on the tail of the motor and disconnect the wires, and remove that half the pump. Next step is to just pull off the diffuser, which may actually have stuck inside the front half the pump. Next remove the impeller, by unscrewing while locking the shaft from the rear with a wrench. if there is a screw in the center of the impeller threaded into motor shaft remove that first. This should be a left handed thread, so unscrew by turning clockwise. The impeller should unscrew counter clockwise like normal. Next remove the seal plate. That should expose 4 bolts holding the motor to the motor mounting plate. Once you remove this you can remove the old seal, clean, and install new seal. you should replace the diffuser and seal plate o-ring as well. Normally I don't recommend a lot of lube on o-rings, but this one can be a bugger to get back together, so use plenty of lube. As I said getting the back half inserted back into the front half is a pain, so you'll just have to work it. Make sure the motor locking ring is forward of the mounting brace that sits on the ground. This can be hard, but if you get it at the right angle it will go raight in place. Make sure the diffeser and/or diffuser o-ring does not slip off into the pump housing when your trying to get it lined up and back into place. There is a notch in the housing and seal plate that have to line up. Sometimes a clamp or ratcheting strap can be used to help pop the two halves back together.
Now all that being said.... it might be worth it to just take the whole pump in to a pump repair shop and let them rebuild it, or put a new motor and seals for ya. At least check the price and consider it. This pump has unions to install it so there is no pipe work required to remove the whole darn thing. Good Luck, and let me know if you have more questions.

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1 Answer

Im getting a loud buzzing noise when the pump is running

could be an obstruction in the impeller, or the bearings going out. You can split the pump in two be removing the large clamp or 4-6 bolts holding the two halves together. (not the 4 bolts holding the motor to seal plate, but the the bolts holding the seal plate to the seal plate housing. once you remove the clamp or bolts, the motor with seal plate and impeller and diffuser can all be pulled back away from the pump. You need to remove the diffuser (plastic housing that goes around the impeller) usually by a series of 3 to 6 small screws. Now you can easily try and spin the impeller and check for obstructions that might have bound it. If you do not see anything stuck in the impeller, then the noise is likely coming from the motor (probably the bearings) you can replace the motor, or have it rebuilt. if your not gunna rebuild it you can deal with it as long as the noise doesn't bother you and the motor is not getting too hot

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The impeller unscrews counter clockwise. I assume you already have the motor disconnected from the pump housing? If you need to hold the motor, it will depend on what kind of motor you have. Some motors have a wrench flat on the rear shaft of the motor if you remove the rear cover. It usually takes a 1/2" open end wrench. Be careful not to bump into the centrufugal switch assembly. Another trick is to use an impact wrench IN REVERSE ONLY it will often break it loose even though the motor spins. Only use it to remove it not to re-install impeller.

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How do you take the empeller off the shaft to put it on the new m

Take the back of the motor off, just a cover, you should find a flat spot on the shaft to fit a wrench, hold the shaft and spin off the Impeller.

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How dose the empeller come off a Hayward Pool Pump?

It unscrews. Remove back cover, hold shaft and spin impeller off.

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Replace pool motor

First you'll need to take the outer 6 bolts off the pump housing and that will allow you to remove the impeller and impeller housing with the motor. Then you can remove all the impeller parts and get to the bolts that hold your motor to the housing....
When you get the impeller and the housing free, check to see if your motor will turn... alot of times the motors get jammed because the pump sucks debris and jams in the impeller.... you may be able to still use your motor...worth a try...

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