Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 7 of 7

Thread: Replacement pump, now I"m leaking

  1. Back To Top    #1

    Join Date
    Sep 2014
    Location
    Fort Lauderdale, FL
    Posts
    144

    Replacement pump, now I"m leaking

    Hi everyone. I've had an old 3/4hp single speed pump on its last legs that finally gave up the ghost this weekend. Had been running hot, finally siezed up. I already had a direct replacement motor on hand, so I did the swap out this weekend. Ran to the local pool store for help with seals/gaskets. In the end I replaced the motor, the shaft seal, the diffuser, and diffuser gasket. Reinstalled, and it runs, but once the pump primes and I have pressure, water is trickling out at the bottom between the motor frame and the seal plate.

    I took it apart again this afternoon, looked everything over, put it back together. Still trickling.

    My pump (unknown make) has the band-style clamp between the seal plate and the wet end of the pump. That gasket seems fine, not leaking there. I can't see where the diffuser gasket could cause a leak like what I'm seeing. That suggests maybe the new shaft seal itself is bad? Or is there anything between the seal plate and the motor? I don't remember a in gasket there offhand, but I'm not sure there should be any water there to seal.

    I'll probably be pulling it apart again tomorrow. Just wonder what else I should be looking for. What are the odds I got a bad shaft seal? Or put it in incorrectly? Or should I suspect the seal plate itself?

    - - - Updated - - -

    Ok, title is a bit misleading. Replacement pump MOTOR, now it's leaking...
    15k in-ground plaster, Hayward C900 cartridge, 3/4hp single speed pump, Barracuda G2 cleaner, TF-100

  2. Back To Top    #2

    Join Date
    Aug 2014
    Location
    Shallotte, NC
    Posts
    693

    Re: Replacement pump, now I"m leaking

    It is the shaft seal. Make sure everything is assembled and seated properly. Check for proper sealing on the shaft and end bell. if you touched the faces of the seal, you need to get all of your body oil off of them.

  3. Back To Top    #3

    Join Date
    Sep 2014
    Location
    Fort Lauderdale, FL
    Posts
    144

    Re: Replacement pump, now I"m leaking

    I'm not sure if I touched the face of the seal or not. Anything in particular you would recommend to clean off any oils?
    15k in-ground plaster, Hayward C900 cartridge, 3/4hp single speed pump, Barracuda G2 cleaner, TF-100

  4. Back To Top    #4

    In the Industry

    Join Date
    Jun 2015
    Location
    Wildomar, California
    Posts
    423

    Re: Replacement pump, now I"m leaking

    But did you replace the seal plate gasket? You did not mention it in your post.

  5. Back To Top    #5

    Join Date
    Sep 2014
    Location
    Fort Lauderdale, FL
    Posts
    144

    Re: Replacement pump, now I"m leaking

    No, I just cleaned, lubed, and re-used the seal plate gasket. It appears to be holding water just fine.

    I took the pump back to the pool store today to verify the orientation of the shaft seal. They said the seal looked fine, and also suspected the seal plate gasket. I reinstalled, and just shot video with my cell phone verifying that no drips are coming off the band clamp/seal plate gasketed joint. Everything I'm seeing points to the shaft seal, IMO.

    Guess it's back to the pool store tomorrow for another shaft seal. What are the odds I got a bad one out of the box? This will be the fourth time I've detatched the motor from the rest of the pump, and the 2nd time I've had to disconnect all the wiring. I'll be a pro before I know it.

    Oh, and just a random comment. @#$*@#$&$ to whoever designed my equipment pad layout. The pump is neatly boxed in by the house on 2 sides, and the filter on another. Leaving the only approach as the input side, with all the valves and 3-way. Of course, the electrical terminals are facing the wall of the house, with only enough room for a shorty screwdriver. The only access I have is to crouch/kneel over the 3-way intake valve, and lean over the length of the pump body. Grrr...

    Very frustrating day... 3 days and almost $200 into this DIY replacement and I still don't have a working pump. Almost wish I'd just bit the bullet and bought a new one.
    15k in-ground plaster, Hayward C900 cartridge, 3/4hp single speed pump, Barracuda G2 cleaner, TF-100

  6. Back To Top    #6
    Agent99's Avatar
    Join Date
    Aug 2008
    Location
    San Jose, CA
    Posts
    688

    Re: Replacement pump, now I"m leaking

    I hear you on equipment layout. I had to deal with that for 17 years until finally, this year, in Spring, we started a full pool and backyard landscape gut and I got to rearrange all the pool equipment!! Now things are nice and 'you're welcome' to the future homeowner of my house.
    ----Chris----
    25k IG/Spa Figure 8, 18x36, Pebble Sheen Blue Granite, Sta-Rite S8M150 Cartridge Filter, Pentair 460805 400k BTU Heater & 011018 IntelliFlo VarSpd
    Liquidator, Fafco Solar Heat, Polaris PB460 Booster Pump w/280 cleaner, Katchaleaf Cover, TF100 Test Kit, FAKE MAIN DRAIN

  7. Back To Top    #7

    Join Date
    Sep 2014
    Location
    Fort Lauderdale, FL
    Posts
    144

    Re: Replacement pump, now I"m leaking

    Success! Put a 2nd shaft seal in there and we're bone dry now! Must've had a bad one or something...

    I think I need a swim, and maybe a drink with a little umbrella in it.
    15k in-ground plaster, Hayward C900 cartridge, 3/4hp single speed pump, Barracuda G2 cleaner, TF-100

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •