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AO Smith Tig welding issues

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  • AO Smith Tig welding issues

    The issue I am having is it will not weld on AC. If you try to scratch start a arc it will just stick to the metal. In DC the HF start will not work, but if I scratch start it I can maintain a arc. The machine use to work fine till one day I was welding in AC and got the tungsten to close to the puddle and then shorted out. After that it would not maintain a arc. I inspected the gaps and its in spec. I am thinking a capacitor issue? Any thoughts. Thanks!

    Heres a pic that I found online that looks just like my welder


    Heres a pic of the inside of my welder

  • #2
    Those Sangamo caps of that era***, used in the H.F. circuit,
    don't last forever.
    I've fould them ruptured wide open, but usually just leaking out
    an oily tar-like substance.

    *** a brown one in the lower pic.
    sigpicViceGrip
    Negative people have a problem for every solution

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    • #3
      Do you know the specs on those capacitors? Is there any upgrades?

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      • #4
        Originally posted by vicegrip View Post
        Those Sangamo caps of that era***, used in the H.F. circuit,
        don't last forever.
        I've fould them ruptured wide open, but usually just leaking out
        an oily tar-like substance.

        *** a brown one in the lower pic.
        Do you know the specs on the capacitors? Any upgrades?

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        • #5
          I'm still having issues with this welder. Wanted to replace the caps but there's no specs on them

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          • #6
            I own the welder in your first picture. If I can get to it I will see if there is anything written on mine. This weekend will be busy but I will try.
            O/A
            DialArc 250p
            A-O Smith A3000
            Lincoln SP 135 w/gas
            And stuff I have lots of stuff.

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            • #7
              Originally posted by Fifelaker View Post
              I own the welder in your first picture. If I can get to it I will see if there is anything written on mine. This weekend will be busy but I will try.
              I would really appericaite it. If you could also take a pic of it too. It seems that some one in the past has added a extra cap as you can see in the pic above. THANKS!!!

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