How To Change The Shaft Seal On A Hayward PowerFlo Pump


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If your Hayward PowerFlo pump is leaking, it is likely the shaft seal on pump has failed. A failed shaft seal can cause damage to your motor and should be replaced as soon as possible. This guide will walk you through changing the shaft seal and gaskets.

Things You'll Need

Socket set with a 1/4" and 8mm socket

Clean paper towel

Flathead screw driver

Step by Step


Step 1

First and foremost, make sure that power to the pump has been cut off. Unplug the pump if possible.

Step 2

Disconnect the hoses by removing the hose clamp then sliding the hose off of the hose adapter. Place the hoses over the swimming pool wall so that the water doesn’t drain out of the pool.

Step 3

I recommend placing the pump on a shop bench or table so that it is easier to work on.

Step 4

Remove the pump lid by gripping the handle and slowly turning the cover counter clockwise, the pulling up towards you. Once the cover is off, remove the basket and drain any water inside of the strainer housing.

Step 5

Next, we’ll need to remove the strainer. To do this, we’ll first need to remove the c-clip that locks it into place. Simply pull it gently outwards towards you and lift it out of place.

Step 6

Now you can begin turning the strainer counter clockwise (if you are facing the strainer) until it can be removed.

Step 7

The next step is to remove the front cover strainer. There are 8 bolts that hold it into place. Using an 8mm socket, begin removing the nuts and bolts.

Step 8

Once the front cover has been removed, you’ll need to expose the rear end of the shaft. If the motor does not have a cover on the back, you can simply remove the shaft access cover.

Step 9

If the motor has a cover on it, you’ll need to remove it to access the rear end of the shaft. Using the 1/4" socket, remove the screw that holds the cover to the motor. The cover can be moved to the side exposing the shaft.

Step 10

With a flat head screw driver, hold the end of the shaft in place while spinning the impeller off of the shaft counter clockwise. Place it to the side for now

Step 11

Using a 1/4" socket, loosen and remove the thru-bolts. If you feel resistance, I would recommend stopping and contacting a professional. If the thru bolts snap, you may have to buy additional parts or a new pump. PROCEED AT YOUR OWN RISK.

Step 12

Once the thru-bolts have been removed, the pump housing can be removed. Make note of the pump housing position before removing it. Place the pump housing face down and use the tip of the screw driver to push the shaft seal out. Be careful not to push on the plastic seat that the shaft seal sits in.

Step 13

Once the ceramic half of the shaft seal has been removed, inspect and clean the pump housing making certain that the rubber seat of the shaft seal was removed as well.

Step 14

Next we will remove the “spring” half of the shaft seal from the impeller. You can simply pull to remove it by hand.

Step 15

If your impeller looks like this after that shaft seal has been removed, you still have one more step. Using the pliers, grip the remainder of the shaft seal and remove it by turning and pulling. Clean the impeller shaft and place it aside for now.

Step 16

Lubricate the shaft seal seat inside of the pump housing.

Step 17

Using a clean paper towel, pick up the ceramic half of the shaft seal (do not touch it with your hands) and push it into place.

Step 18

Once the shaft seal is in place, you can begin installing the pump housing back onto the motor. Line up the thru bolt holes on the motor with the holes on the back of the pump housing.

Step 19

With the pump housing in place, lubricate the shaft of the impeller. Install the other half of the shaft seal onto the impeller. The black surface of the shaft seal should be facing you once installed.

Step 20

Using the flat head screw driver, hold the rear end of the shaft in place and thread the impeller back onto the shaft.

Step 21

Inspect the pump housing o-ring and replace if necessary. Lubricate the o-ring before putting it back onto the pump housing.

Step 22

Once the o-ring is in place, you can put the pump housing cover back on. Use the nuts and bolts you removed before to attach it to the pump housing.

Step 23

Before installing the strainer housing, inspect the o-ring and replace if necessary Lubricate the o-ring before putting it back on.

Step 24

The strainer doesn’t need to be threaded on tightly. Once it is upright with a little play, line up the grooves, and install the retaining clip.

Step 25

Inspect the lid o-ring and replace if necessary.

Step 26

Re-install the strainer basket and fill the strainer with water to prime the pump. Inspect the lid o-ring and replace if necessary, lubricate the lid o-ring then secure the lid to the strainer.

Step 27

Turn the power on to the pump and check for leaks. If these are any leaks, turn off the power to the pump and repair the leak.

Step 28

Your project is now complete and your pump should be as good as new.


(1 to 11 of 11)

 Posted: 5/22/2022 

I have a Hayward Power Flo LX and can’t get or pop off the little silver circle off to get my impeller off. Used a flat head screw driver and it won’t budge.

InyoPools Product Specialist  Posted: 5/23/2022 

Please review the diagram on the following link. Which key number in the diagram are your referring to? Hayward Power-Flo LX1580, 1520UN, 1680

 Posted: 4/14/2020 

I am replacing the seal on my SP1580. I have installed my new ceramic half of the seal, but noticed that it does not completely bottom out on the flat portion of the seat. it lacks maybe 1/8". I tried lightly tapping it, but it doesn't go down any farther. Does it actually seat on the flat portion of the recess, or does the rubber cup portion make the seal by gripping the sides of the recess?

InyoPools Product Specialist  Posted: 4/15/2020 

The rubber gasket around the ceramic seal and the spring tension of the other side keeps the mechanism watertight.

 Posted: 2/19/2020 

Found a solution to a frozen impeller that I had asked about. I clamped a pair of vice grips to the motor shaft between the motor and the pump housing. Then I gave the impeller blades 3 or 4 lights raps with a screwdriver and hammer- SUCCESS! with no damage to impeller

Anonymous  Posted: 8/8/2019 

How tight do you make the impeller on the motor shaft?

InyoPools Product Specialist  Posted: 8/8/2019 

Hand-tighten the impeller because the rotation of the motor keeps the impeller secured to the shaft.

InyoPools Product Specialist  Posted: 7/18/2014 

Pump seals – The “200” shaft seal goes on a Sta-Rite Dura-Glas or Max-E-Glas pump. The “201” shaft seal goes on a a Sta-Rite Dura-Glas II or Max-E-Glas II pump. These seal should not be lubricated especially the ceramic surfaces.

Anonymous  Posted: 7/18/2014 

I am installing a new pump,i have 2 pump seals a 200 and a 201,they look the same which one goes where.also what kind of lubricant do I use

InyoPools Product Specialist  Posted: 7/18/2013 

tom g - I'm not sure what the issue is here. The ceramic part of the seal comes with the rubber gasket on the seal. If the issue is getting the seal and rubber gasket into the pump housing, check to make sure that the old rubber gasket came out with the old ceramic seal. Sometime that gasket is left behind and prevents the insertion of the new gasket and seal.

 Posted: 7/17/2013 

Was great except I wasn't sure how to put back the rubber gasket on the ceramic motor shaft seal