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Thread: Polaris Pump PB4 BOOSTER PUMP seal replacement problem.

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    Polaris Pump PB4 BOOSTER PUMP seal replacement problem.

    I am trying to follow typical directions online by taking apart the back cap and was going to secure the shaft from spinning but the back does not look like others that can be secured with a screwdriver or wrench. The back is round flat and flushed nothing sticking out to put a wrench on and no notch to put a flat head screwdriver to lock it down.

    The spinning front seal in the center looks to have a cap like nut in the center. I am trying to figure out how to secure and take off spinning part where the front seal is located and the O-ring is around. Any help would be awesome this is a older PB4. Also, started leaking at bottom when I ran the polaris pump while pool pump was off so the pressure caused leaks at cut off valve and on from of pump at volut and around the secure bolts.

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    Re: Polaris Pump PB4 BOOSTER PUMP seal replacement problem.

    HowTo: Change the pump seal on a Polaris Booster Pump poolplaza.com - YouTube

    There is an access cover covering the end of the shaft. It's either a cap that you pry off with a screwdriver or a hex cap that you unscrew.

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    Re: Polaris Pump PB4 BOOSTER PUMP seal replacement problem.

    This is the back of the shaft after taking cap off. This is the part I don't know how to secure. Nothing sticks out. This is round and small hole in center. It is pretty much flush not like other ones that stick out to put a wrench on in the typical videos.
    image1.jpg

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    Re: Polaris Pump PB4 BOOSTER PUMP seal replacement problem.

    That's odd. Maybe you can lock the shaft by gripping it in the side access just behind the impeller and seal plate.

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    Re: Polaris Pump PB4 BOOSTER PUMP seal replacement problem.

    Yeah it is weird. I tried several wrenches and still can't figure how to grip it so I went to front trying to see if I can stop it from turning there.

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