20 Most Recent Zoeller M53 Mighty Mate Iron Body, Poly Base Automatic Sump Pump 1/3 HP Questions & Answers

I imagine you asked the plumber why the pump is running continuously and he replied as you said but what he simply meant was, because water is in the sump. I'll address pump switch failure later.So the question should be why is water continually entering the sump. It could be because the water table level is high but its been my experience a sump pump runs nonstop because water expelled by the pump is flowing directly back into the sump.Have you asked neighbors if their pumps run nonstop? Do you have continuous standing water around your home?If you don't have standing water around your home and your neighbors dont have the problem with their sump pumps running nonstop then the most likely cause is the pump outlet is flowing back into the sump. In other words, its continuously recirculating the same water.Here's how I"ve diagnosed this issue in the past. Install a temporary 1 1/2 inch pvc line to discharge the pump outlet on the ground a minimum 20 feet from the house foundation on ground with a downward slope. This gets the pump outlet far enough away from the house that water should not re-enter the house sump. If your pump then cycles normally, you know the problem is because water from the pump outlet is reentering the sump. Then it's a matter of determining why the original pump outlet is flowing back into the sump.As for pump failures... most sump pumps are not designed for continous duty and the switches are of marginal quality. I alleviated the switch issue by zip tying the switch float of the pump up so it is always on and installed a seperate sump float switch that will last longer than the original.

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I had the same problem of pump not turning on unless I tapped the pipe to create a vibration. I took the float off and cleaned the grime / buildup. The buildup changed the buoyancy of the float (made it heavier) such that it did not float high enough to trigger the switch. Once cleaned, the float floats much higher above the water line and triggers the switch.

It probably draws about 6 amps so the power is 720 watts. Put it on a separate 15 Amp fused line so it doesn't put electrical noise into other items such a TV or radio for best results.

I'm not expert but have two M53 Zoeller sumps, one in the pit another as a spare which I plan on rebuilding. The weight on the float is at the bottom of both. Hope that helps.

Can you replace the switch? If not, you can wire in a new generic float switch for far less than purchasing a new pump. A decent hardware or electrical supply house should have a float switch and they should be able to help you wire it or you can Google float switch installation to get an idea of how to do it yourself (it is not too complicated).

i hope this helps
matthew

That usually means the rotor on the motor is locked. To check and possibly free it up, Turn pump over and find which socket fits the impeller nut. Try to turn nut either way. Once it spins freely , plug pump in and see if it works. If it still doesn't turn, you have a locked rotor.

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

It is called Di-electric oil and it needs to be completely filled up and possibly a new gasket if it doesnt seal correctly.

Ugh. Me too! I keeps setting off my back up pump with alarm. Driving me crazy!

replace the receptacle, its tripping due to wear . if the unit works fine in another receptacle , its not the unit

I'm not sure what was damaged, but sump pump switches are available at Home Depot & Lowes. In many cases, the switch is wired separately, anyway, making it somewhat simple to replace.

If you can get into the lower part where the pump sucks the water in, then see if you can get it to turn the opposite direction.(screwdriver) Probably a stone holding it back. Make sure power is unplugged before attempting anything. good luck