Zoeller M53 Mighty Mate Iron Body, Poly Base Automatic Sump Pump 1/3 HP Logo
Anonymous Posted on Aug 29, 2011

My Zoeller M53 Sump Pump Shorted out since the gasket seems to have partially rotted after 2 years Itis not used that often. I opened the wrong area of the pump and drained part of the oil. WHAT TYPe Oil and how much do i put bak in the pump. Thanks

  • Anonymous Sep 01, 2011

    Thank you. I went to a Zoellelr service center and bought a new gasket and a quart of oil.
    The switch still works and the only way water could have entered is thru a bad gasket.
    The only reason I needed oil is I drained part of it accidentally during Hurrican IRENE this weekend.

    Again thanks for your help.

  • Anonymous Mar 16, 2014

    Zoeller house sump pump

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1 Answer

John Prohaska

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  • Master 1,378 Answers
  • Posted on Aug 29, 2011
John Prohaska
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If your seal or gasket failed and water penetrated into the motor cabinet how certain are you that whatever you have done has actually remedied the underlying issue of the pump being grounded?

A new M53 is ~$125 - $150 and the oil is not something you can walk into the hardware store and pick up off the shelf. I'd want to be certain you have fixed the ground first. Having worked on these in the past it is unlikely you are going to fix anything wrong with the winding, especially for less than a new unit.

If all is OK and the oil is all you need ask around at local pump repair shops for 10 or 20 weight non-detergent pump oil...they should know what you want and if they sell it, you should be all set. As for the amount, pour it in slowly until you see the winding is fully submerged. You need to leave room at the top to allow for thermal expansion of the oil.

John

  • Anonymous Sep 01, 2011

    Thank you. I only needed oil since I unintentionally drained some during Hurrican Irene after the pump shorted out.
    I went to an Authorized service center and bought the oil and a new gasket. I will find out if it works when I intentionally submerse the pump and let it sit under water for a while.
    The switch still works and I am sure the only way water got into where the wiring is is thru a faulty gasket or gremlins.

    Again thank you for replying I do apppreciate when someone takes the time to offer help.

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