Question about Hayward Northstar 2 - Hp In Ground Pool Pump

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I disassembled the pump but I can't get the impeller off. It's stripped and needs replacing. I don't want to force it and break something else. What is the best way to remove the impeller? It's the No

I disassembled the pump but I can't get the impeller off. It's stripped and needs replacing. I don't want to force it and break something else. What is the best way to remove the impeller? It's the Northstar pump. Barry

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I broke the outer circle of the impeller off with a screw driver and then used a Dremel tool to cut the plastic down to the shaft so I could break if off the threaded shaft.

Posted on May 27, 2009

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Our centurion pool pump motor Model B128 replaced less than 1 year ago. Pool company has to replace the impeller twice. Is this common? I believe the pool co sold and installed a used pump instead


Broken impellers generally are not caused by the pump's motor. Impellers usually fail due to back pressure from the filter when the pump shuts off. Air in the filter is compressed while the motor runs, on your pump 12-15 psi. or a bit higher.

When the motor shuts off that compressed air forces water back to the pump, sometimes with enough force to loosen (or completely throw off) the impeller. If the impeller is loose when the pump starts up again it will instantly re-thread the impeller and strip out the threads.

Check to see if you have a suction leak. After the pump has turned on, bleed the air out from the air relief valve on top of the filter. After the pump has run for a while open the air relief valve and see if air comes out. There should be no air, or just a little.

I have seen this back pressure strong enough to blow the skimmer basket up onto the deck.

What make and model of pump and filter do you have?

Feb 22, 2013 | Pool & Spa

1 Answer

How to replace bearings


Must disassemble the pump from the motor. The impeller has RH threads so hold motor armature (do not damage it) and turn impeller CCW to remove it from end of shaft. Hold armature in left hand and rotate impeller with right hand, turning hand on impeller back toward your body, or top of impeller toward you. Don't know how else to describe it. Once you have the impeller off everything should come apart pretty easily.
If impeller is really stuck, you will need to figure out how to hold it evenly all the way around without putting pressure on blades. Strap wrench, home made jig, something that can put more pressure on it than your hand.
You may want to remove the motor field so that you can grasp the armature while removing the impeller, do this by removing the long screws from the end of the motor.

Gently pry, tap, slide, however you can, get the bearings off the armature shaft without damaging any parts attached to it like fans, or starter centrifugal weights. Those things can be removed if needed.


Put new bearings on by sliding over shaft and seating in place by driving against the center race only. Do not drive bearing on by striking the outer race to move the inner race, this will damage the bearing.

Aug 14, 2012 | AO Smith SQ1152 Pool Pump Motor

1 Answer

Impeller rusted on how to remove


removing the Impeller, is actually not that bad. You say it's rusted on but I have to ask why you think it's "rusted". I have to assume it's just on real tight and you just assumed it's rusted. If your removing the impeller I have to assume either you need to place the shaft seal, the motor, or the impeller itself is bad and your replacing it. Either way the procedure is pretty much the same. To remove the impeller you need to lock the motor and unscrew impeller. Depending on the motor, you remove have a cap in the middle of the tail piece and hold with a wrench, usually 9/16", or remove a cap that covers the whole end and grab the shaft with a wrench (usually 7/16") by sliding it under one of the components and then turning impeller. If the impeller has a bolt or screw in the middle remove that first. It should be reverse thread so make sure you don't turn the wrong way and break or strip. If there is no screw, or after you've removed it, just spin the impeller off (it should be counter clockwise standard thread). If you can't do it by hand and assuming you don't have an impeller wrench, be very careful and use a large pliers, pipe wrench, or strap wrench to loosen it. After that you can unbolt the motor from the seal plate. If the Impeller is corroded, or rusted as you say and it's really hard to remove, you just have to man handle it. If the impeller breaks or the brass insert strips out, you'll have to cut it away till you get to the shaft and can use channel locks, locking pliers etc to remove the insert however necessary. It is rare for this to happen, but it can happen. Impellers can break, fail, or strip out like anything else.
Hope this helps. If you need further assistance post a reply in the comments, and don't hesitate to leave good thumb rating if you found this helpful. Thanks, and good Luck!

Sep 29, 2010 | Polaris Pb4 - 60 Booster Pump

1 Answer

Pool sweep pump stuck and will not turn.Binding on impeller to rubber seal.How to disassemble remove impeller and seal.


Sounds like maybe your motor bearing are going bad, or have already seized up. When you say "rubber seal" are you referring to the rubber portion of the shaft seal? Either way, to remove the impeller you need to lock the motor and unscrew impeller. Depending on the motor, you remove a cap in the middle of the tailpiece and hold with a wrench, or remove a cap that covers the whole end and grab the shaft with a wrench (usually 7/16") by sliding it under one of the components (not sure exact part off top of my head have to look at it) and then turning impeller. If the impeller has a bolt or screw in the middle remove that first. It should be reverse thread so make sure you don't turn the wrong way and break or strip. If there is no screw, or after you've removed it, just spin the impeller off (it should be counter clockwise standard thread). If you can't do it by hand and assuming you don't have an impeller wrench, be very careful and use a large pliers, pipe wrench, or strap wrench to loosen it. After that you unbolt the motor from the seal plate, pull the seal plate away from motor (this removes half the seal), and then pop the other half of the seal from the seal plate. If the bearings are seized up then you'll have to replace the motor, or have it rebuilt.

Sep 18, 2010 | Pentair Letro Booster Pump IMPELLER LA02L

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Removal of Aqua-Flo pump from motor


You will need to pull the front of the pump off then unscrew the impeller. The impeller will be set on the shaft and will take some force to break free. Hold ing the back of the shaft and using water pump pliers on the face of the impeller will usually work but sometimes I will wedge a screwdriver in the fin of the impeller and hit it sharply (not hard) with a hammer to break it free. Then the housing will just pull free of the motor. When replaceing, the impeller just goes on hand tight. Hope this helps and good luck.

Apr 15, 2010 | Aqua Flo 1 HP Aqua-Flo Pump: 1.5" in/out,...

1 Answer

My Hayward just hums when I turn it on and after a few seconds the breaker pops.


You will need to disassemble the pump and check the impeller. remove any debris and try turning the impeller by hand. If it does not move or is dragging, you will need to overhaul the pump. Possibly a shaft seal leak has damaged the motor bearing(s). Replace the shaft seal and motor bearings. If the motor is badly deteriorated, you might need to replace the motor. Note... the impeller turns counterclockwise to loosen. you may need special tools to grip and hold the motor shaft and the impeller to prevent damage to the impeller. If the impeller is seized on the shaft from rust, you may have to break it to get it off. reassemble with teflon lubricant on the shaft threads when reinstalling the impeller. This will prevent seizure later.

Apr 10, 2010 | Hayward 2HP Pool Pump Motor A O Smith...

1 Answer

Maytag Neptune purchased brand new in 2007. Tumbler won't spin and water doesn't get pumped out, all I head is a humming noise coming from the water pump. I opened the back and could feel the water pump...


There is something jamming the impellers in the pump (coin, nail, bobby pin, ect.) You need to manually get the water out, remove the pump, and see if you can find and remove the obstruction. If you find something in the pump and remove it, check the impellers before you put the pump back in. There are 3 plastic impellers, make sure none of them broke off. If they did not break off, your good to go. If one or more broke off, you will need to replace the pump, you cannot buy just the impellers. good luck.

Oct 16, 2009 | Maytag Neptune MAH5500B Front Load Washer

2 Answers

Does not pump all the water


Posted solution had a link to the manual. This was the key. Problem was lint in the drain pump impeller. Necessarey to remove pump cover (no need to dismount pump) with an allen wrench. Note of caution the pump housing is soft and the allen screws can strip out.

Jul 31, 2009 | Whirlpool Calypso GVW9959K Top Load Washer

1 Answer

Pump disassembly


I removed the impeller on my DW761UQB. The instructions were molded into the plastic pump housing. This is how I DID MINE: Remove motor mount screws. Remove the chopper screw (screw only goes into impeller, not motor shaft). Remove chopper and rotate/remove strainer. Place socket or wrench on impeller tip and place another wrench on rear of motor's plastic fan. Unscrew fan from impeller shaft ( threads are LEFT handed, turn CW). Once fan is 'backed off' of the impeller, CAREFULLY pry the motor/fan from pump housing (impeller is attached to motor shaft via splines). Don't crack the delicate plastic pump housing. Mine was stuck, but separated with moderate force. Now remove the impeller/seals from the pump housing. This worked for MY above mentioned model, I don't know what other models it applies to. I am not a pro.

Sep 25, 2008 | Dishwashers

2 Answers

DDW399D Dishwasher


Check and make sure that there is nothing blocking the pump inlet underneath the mesh removable filter. It should be making a whirring sound like it's trying to pull water in in a cycle. If it's not making that noise your pump is shot.

Oct 14, 2007 | Danby 22 in. DDW399 Free-standing...

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