Question about Pentair Pinnacle 1 1/2 - Hp In Ground Pool Pump

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Pentair whisperflo pool pump motor replacement, how do you remove the motor? has a threaded shaft. does the cover plate have to come off the pump/volute?

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No there is a cover on the other side of the motor thet comes off and with a 9/16 wrench holding the shaft - spin the impeller off

Posted on Jun 28, 2009

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When I changed Pentair Whiperflo motor with new Impeller & Diffuser seals the new motor shaft does not turn. Diffuser is pressing against Impellor not allowing it to rotate. What is wrong ?


Take the Diffuser off and run it if the impeller turns then might be tightening the Diffuser too much, it just needs to not move, doesnt really need a super waterproof seal or anything like that. If it still doesnt turn with the Diffuser off it might have locked up when replacing the Impeller, you can try to turn the impeller manually or remove the cover plate on the back of the moter and turn the shaft manually back there. OOoorr you broke it

Aug 03, 2015 | Pentair 2.0 Hp Whisperflo Pump

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MY 1000GPH INTEX FILTER PUMP IS DISMANTLED BUT I CANNOT GET THE IMPELLER OFF THE SHAFT


there should be a backwards threaded screw take that off then hold the back of the motor shaft and unscrew the impeller regular threads

Apr 13, 2014 | Pentair 2 hp WhisperFlo InGround Pool Pump...

1 Answer

Removing impeller from OJ800 water pump


The impeller has a reverse thread locking screw through the center. You can secure the motor shaft by putting a 9/16 open end wrench on the other end of the shaft, which is under a cap in the middle of the rear of the motor.
Check your seal plate carefully. Whisperflo is a great pump but they don't take heat very well. It is very common for the seal plate to also be damaged when the pump runs hot, particularly the lower inserts where the bolts screw into.

Jan 05, 2014 | Pentair 1 hp WhisperFlo InGround Pool Pump...

1 Answer

Pentair 011523 pump shaft seal is leaking. How do you remove the impeller and motor?


Separate the plumbing portion of the pump from the seal plate which is attached to the motor. The bolts will be a 9/16 inch hex head, that are visible facing the motor. Remove those bolts. That will then allow you to pull the motor and the seal plate away from the plumbing portion of the pump. Remove the diffuser which is covering the impeller, and then the impeller will need to be unthreaded off of the motors shaft. The motors shaft, will need to be locked. You can do this by removing the Cap on the backside of the motor and you can use whatever tool required to keep the shaft from spinning. Once you are able to lock the shaft, you can read the impeller... Note* some styles will have a screw in the middle of the impeller securing it to the motors shaft? This screw is Backwards thread, not normal thread. If your pump has this screw, need to remove it first, then you will be able to unthread the impeller off of the motors shaft.
once the impeller is removed, you can then remove the two halves of the shaft seal. Very carefully reinsert the new shaft seal into the proper places, just the way they were prior to you removing them.

Reassemble in backwards order as you disassembled everything.
good luck

Sep 04, 2013 | Pentair 011523 WhisperFlo High Performance...

1 Answer

How to separate pump from motor


take screws off around housing that separates motor from wet end remove diffuser then remove screw from impeller backwards thread and hold back shaft of motor after removing still hold shaft and turn impeller off regular threads make sure to replace seals

Apr 16, 2013 | Pentair 1 hp WhisperFlo InGround Pool Pump...

1 Answer

How to strip pool pump, pantera bearing has pack up


You are probably wondering how to remove the impeller - generally, these are screwed on to tha motor shaft - motors normally run clockwise when viewed from the rear, so thread is normal right hand. remove fan cowl and fan from motor in order to be able to restrain the shaft while you unscrew the impeller - it should be straightforward from there.

Bearing failure is more often than not brought on by leakaege from the mechanical seal - when you reassemble the pump you should replace the seal assembl - also make sure that there is no damage in the form of melted plastic around the seal stationary seat area; replace parts as necessary.

Jan 24, 2011 | Pentair 1 hp WhisperFlo InGround Pool Pump...

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Winding noise with some water leaking from the motor seal. Water still flowing but sounds laborous.


The shaft seal more likely than not needs to be replaced. If your shaft seal has been leaking for any length of time, the bearings could be damaged and this should be replaced. The whisperflow uses a PS1000 shaft seal and is fairly easy to replace (most seals available online or at most swimming pool retail stores). It is best advised not to run the pump until you have had this inspected by a licensed pool technician or have changed out the seal.

1) Make sure breaker/power to pump is off. 2) Remove the six bolts holding the wet end to the seal plate. 3) Remove the diffuser to expose the impeller. 4) Remove the screw in the middle of the impeller by turning clockwise (left hand threads). 5) Remove the dust cap at the rear of the motor and use a wrench to hold the shaft while you remove the impeller by turning counterclockwise. 6) Once the impeller is off, remove the four bolts holding the seal plate to the motor. 7) Press the old seal out of the seal plate and clean it thoroughly. Remove the ceramic part of the seal from the impeller and clean it thoroughly as well. 8) Apply a thin coat of lube (I prefer Magic Lube or Lube Tube) to the seal plate and impeller where the new seal will go. 9) Remove the new PS1000 shaft seal from the box (being careful *NOT* to touch the ceramic or carbon face with your fingers), press the metal part into the seal plate carefully, try not to bend the metal and make sure its completely seated against the seal plate. 10) You can now install the seal plate back onto the motor and secure with four bolts. Press the ceramic part into the impeller, use cardboard or paper between your fingers and the ceramic face. 11) Once you have seated the seal into the impeller, hold the motor shaft and thread the impeller on until snug, then reinstall the stainless screw, remember it is left hand thread so you'll have to turn it counterclockwise. 12) Reinstall the diffuser over the impeller and then install the wet end onto the seal plate using the six bolts, don't overtighten them.
Check the pump for operation and you should be good to go!


Dec 07, 2010 | Pentair 011515 WhisperFlo FullRated Energy...

1 Answer

Good morning. Three years ago we had an inground 15,000 gallon salt water pool installed that included a Pentair pump. The last couple of mornings there is a terrrible whine occurring as the pump kicks...


More than likly it's a square flange motor. If the noise is just starting when you take the pump apart you can check the impeller for problems but the most likley is a bearing going bad from a seal leak. If you remove the wires and take the motor with the back half of the pump to a pool store they can diagnose it for you and do the nessary repairs at the shop. Usually they will do this for a small bench fee or for just the price of the nessary parts.

Oct 07, 2010 | Pentair 1hp Whisperflo Pool Pump In -...

1 Answer

How to seperate pump from motor


Disconnect all power. Remove the six bolts holding the seal plate to the wet end. Remove the two small allen screws to remove the diffuser. Remove the dust cap from the end of the motor and secure the shaft from moving. If installed, remove the Phillips head screw in the center of the impeller by turning clockwise (left hand threads). You can now remove the impeller by turning counter clockwise, note that you may need an impeller wrench to remove it and a specific tool to hold the shaft while you remove the impeller. Once the impeller is off you can remove the four bolts that hold the motor to the seal plate. This process just needs to be reversed to re-install but you will need a new shaft seal (PS-1000).

Jun 30, 2010 | Pentair 1 hp WhisperFlo InGround Pool Pump...

1 Answer

Remove impellar?


Remove back cover from motor. Hold shaft stationary with wrench or screwdriver(depends on motor) Unscrew impeller. Some impellers have a screw in the middle securing it to shaft. The screw is reverse thread.

Mar 27, 2010 | Pentair 1.0 Hp Whisperflo Pump

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