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Thread: Sta-rite MSE rebuild

  1. #1
    Water well drilling contractor Sixdays's Avatar
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    Default Sta-rite MSE rebuild

    Howdy, been a while since I visited the forum but as always there is an amazing amount of knowledge here!

    Anyhow, I have a question that somebody may have a quick answer to. I rebuild a few Sta-rite MSE pumps and usually put the pump in a barrel of water with an ejector rigged up to test them. Of course half the time a piece of trash plugs the jet and I have to clean it out. Not a big deal but in order to save time I tried just submerging the pump end in a bucket of water. The idea is to run the pump and flush out any junk before I install it and plug a jet assembly on somebody's well. So, I tried this approach and the pump motor starts too slow, never gets up to speed and just pulls too many amps................ Before I condem the motor (which may be bad) I just wondering if this set-up is "over-amping" the motor"? Motor is wired to run on 110V and ran fine on the bench with no load (yes I know the motor could still be bad...........hahaha).

    Oh yes, I recently ran a few MSE pumps with no ejector on my test barrel. I just plugged the drive side port and put an old footvalve on the suction side............ seems like that worked OK........... still had to use the barrel though..

    Any ideas..... suggestions for dealing with MSE pumps..?

    Thanks,
    TS
    Last edited by Sixdays; 02-02-2012 at 04:23 PM.

  2. #2
    General Engineering Contractor ballvalve's Avatar
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    Is this the pump? http://www.lockewell.com/pdf/sta-rite/ms-series.pdf

    Running it without restricting the outlet could cause high amp draw. Your test bench should have a outlet valve and pressure gauge to watch amps as you close down the valve and raise the pressure.

  3. #3
    Water well drilling contractor Sixdays's Avatar
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    Yes that is the pump.

    I kind of answered my own question................... went back to the test rig with a plug on the "drive" side and a checkvalve on the suction side. As you mention.............. have to control the discharge volume ............... this is done by the pressure regulator supplied with the pump..........

    I guess it's true what they say " the lazy man works the hardest"........................ hahaha

    Thanks,
    TS

  4. #4
    In the Trades Texas Wellman's Avatar
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    We had a test bench years ago (made by Sta-Rite). It had a little well head and discharge etc. It even had a gauge for amps and flow. It was more a PITA to hook everything up than to just take the pump back to the well and let er rip.

    I understand about getting trash in the jet, it happens. I never test them anymore and rarely do I plug up the jet. Just make sure you clean out the internals good with air or use a good water hose if it's really dirty. I have rebuilt hundreds of these pump through the years so I know them pretty well.

    I much prefer the Goulds jet pumps to the MSE series anymore, they are much easier to rebuild and cheaper too.

  5. #5
    Water well drilling contractor Sixdays's Avatar
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    Thanks for your reply, most people don't work on pumps any more................ just sell new ones. Yep, they are a pain to work on the worst thing is cleaning all the rust / iron build up. I probably should not test them either because there is rarely a problem and then if that freshly rebuilt pump sets around for long it rust and more scale and craparoo turns loose.............

    Amen on the Goulds pumps they are much easier to clean but those never really caught on here!
    TS

  6. #6
    In the Trades Texas Wellman's Avatar
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    Really? The Goulds 1-HP is about $75-100 cheaper than the 1-HP Sta Rite MSE. The only drawback is that they don't pump quite as much water as the sta-rite.

    You probably noticed that the motors for the MSE are much higher than the goulds. It's because they have a service factor of 1.65, which means that it's really more like a 1.5 HP motor. Not to mention that it's a special design and only AO smith makes them.

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