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table motor hums


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  • table motor hums

    82-70's. One board chassis. Table motor will hum and not run. I have changed the motor including the gear box. Changed the 2 capacitors. Changed the chassis. No luck.
    Any ideas?

  • #2
    Re: table motor hums

    I am assuming that you have tried to crank the motor to make sure nothing is binding.
    I would check the motor plug for burned pins or broken wire. I would do a continuity test between the plug and all connections involved.
    The plug has 3 wires:
    Black - goes to TS 22 which goes to C1 31A
    Green - goes to TS 20 which goes to capacitor 2 and C1 32 EE
    White - goes to TS1A1 which goes to C1 13L and C1 21D

    If your plug is ok, I would check C1 for burned pins, or a pin pushed out of the housing at locations 31A 32 EE 13L 21D .

    There is light at the end of the tunnel - just be sure it is not a train.


    • #3
      Re: table motor hums

      Take apart the table motor plug. There maybe a wire off that you can't see that causes this problem. I have seen it 2 times in 28 years. Let us know what you find [img]/content/btubb/images/%%GRAEMLIN_URL%%/eek.gif[/img]


      • #4
        Re: table motor hums

        I agree with talon. Strip your table motor plug down (machine side). You'll probably find a broken wire.

        Had this a couple of times myself, always looks like they just been cut.... strange.

        Other way to diagnose problem is, with table at zero. connect table plug into sweep motor, if it will reach. Run table from chassis. The sweep should run . if it HMMMM's your half way there.


        • #5
          Re: table motor hums

          I have had the capacitors mislabeled......change all 4.



          • #6
            Re: table motor hums

            Still have centrifugal start switch?
            Might not be closing contacts, causing motor to try and start with run windings.


            • #7
              Re: table motor hums

              Originally posted by talon1189:
              Take apart the table motor plug. There maybe a wire off that you can't see that causes this problem. I have seen it 2 times in 28 years. Let us know what you find [img]/content/btubb/images/%%GRAEMLIN_URL%%/eek.gif[/img]
              <font size="2" face="Verdana, Helvetica, sans-serif">Also Just Plain Rotten wires in wireway.
              If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it.&quot; -W.C.Fields


              • #8
                Re: table motor hums

                Thanks for all the help. It was a broken wire in the motor plug. I have to get one of those cheater plugs. I think I saw it posted somewhere that Stahl's sells them. Thanks again.


                • #9
                  Re: table motor hums

                  The pins/sockets on either end of the C1 can cause that too if they get worn or burnt, I would check those while you're at it to eliminate the chance of a coincodence.
                  82-70's SS Chassis Omega-Tek w/expanders
                  2009 Qubica scoring 3QT's and 6 box.


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