Pumps my weak link..need advice

Discussion in 'Irrigation' started by FIMCO-MEISTER, Jun 3, 2011.

  1. Firing up the pond at the building I manage part time. Filled the pond completely up. Did everything I could to bleed the air out of the lines. Turned the power on to the recirculating pump and it whirred for about 30 seconds then died. Dead silent. Power is good to it.

    Before I order a new one and replace anybody want to give me some troubleshooting thoughts?

    I put my wrench to the propeller shaft and it turns.

    FT pump Jacuzzi.jpg

    Fountain Terrace pump.jpg
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,009

    Doesn't look like it would have a thermal cut-off. Resistance testing?

    By the way, if it does come to replacement, you do well to have the same construction, since the "square-flange" pumps don't give you the ability to get a wrench on the motor shaft.
     
  3. Explain a little more. I can safely disconnect the wiring on this pump so it would be a good opportunity to learn a few things.
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,009

    Some motors have thermal protection - you can see more under the end cap - sometimes even a reset button

    I've been fairly lucky with pumps, so I haven't had to get into motor diagnostics. Having had to free up stuck shafts on system startups makes me forever wanting nothing to do with square-flange pumps (they're cheaper)
     
  5. jabbo

    jabbo LawnSite Member
    Posts: 215

    Ohm out the windings... Unhook the wires L1, L2, and L3 after you write down how they are attached. Then ohm out L1 to L2, L1 to L3, and L2 to L3. Then ohm out L1 to ground, L2 to ground, and L3 to ground. Compare like readings! Do this only if you find correct voltage to all 3 phases and no thermal overload or (red)reset button needs to be reset.
     
  6. Will do that and report back
    Thanks big time.
     
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,009

    Hey there! How are those shrub sprinklers coming along? :)
     
  8. jabbo

    jabbo LawnSite Member
    Posts: 215

    My guess is that the motor is single-phasing!!! Anybody else???
     
  9. jabbo

    jabbo LawnSite Member
    Posts: 215

    Boots I replaced all with drip. Working pretty nice at the moment even in this horrible dry/hot slump we are in. I even ran white 1/4" hose up to the hanging baskets so we have nothing to water by hand. The back yard around the pool/porch area looks awesome!!! Now I'm in the process of raising my pgp's because in some spots the yard has grown 2-3 inches...:dizzy: I am also changing all the original red nozzles to the blue ones. Since we have gotten so dry, the weak areas in my design are showing up and one of them is the mid-range spots on those red nozzles...
     
  10. jabbo

    jabbo LawnSite Member
    Posts: 215

    Never mind. You said the power was good so not that...Probably open or shorted winding...
     

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