How To Replace The Shaft Seal On A Hayward PowerFlo Pump

This guide will take you step by step through changing the shaft seal and gaskets.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. 

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

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.

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

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.

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.

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

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.

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.

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.

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.

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.

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.

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.

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

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.

16. Lubricate the shaft seal seat inside of the pump housing.

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.

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.

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.

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

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

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.

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

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.

25. Inspect the lid o-ring and replace if necessary.

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.

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.

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

If you have any other questions about pool and spa products please do let us know - we are here to help! 

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