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Thread: Lincoln Pro MiG 140 Dead

  1. #1
    Join Date
    Mar 2021
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    Lincoln Pro MiG 140 Dead

    Hi,
    I’m new and know little about what I am doing with a mig welder I bought on a whim some years ago at Lowe’s

    Sn M39806
    11173
    was working well but then sputtering and died.
    trigger is good
    wire feeds easily
    flux core .035
    no gas
    No spark at all now.
    connections are tight.
    and perhaps moist critically right in the middle of a honey do project.
    anything would be greatly appreciated
    Crobar
    Last edited by Crobar; 03-27-2021 at 04:32 PM.

  2. #2
    Join Date
    Jun 2012
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    Sebeka and Bemidji MN
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    Re: Lincoln Pro MiG 140 Dead

    This will sound dumb, but I've seen the knobs on those get turned slightly off from the click point. Still feeds wire but no weld.

    If yours has continuous dials, then that doesn't apply...

    But, make sure your "ground clamp" is clamped on a bare ground down spot.

    If good contact is not made, no weld.
    Dave J.

    Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

    Syncro 350
    Invertec v250-s
    Thermal Arc 161 and 300
    MM210
    Dialarc
    Tried being normal once, didn't take....I think it was a Tuesday.

  3. #3
    Join Date
    Mar 2021
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    Re: Lincoln Pro MiG 140 Dead

    Good clean contact point just a couple inches from weld point.
    new ground clamp.
    will check dials for good positioning as I do believe it is something odd like that.
    thanks for your response
    Crobar

  4. #4
    Join Date
    Mar 2021
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    Re: Lincoln Pro MiG 140 Dead

    No go
    still no spark
    maybe I need to test components?
    Don’t know which is most likely to die first.

  5. #5
    Join Date
    Aug 2013
    Location
    Austell GA USA
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    Re: Lincoln Pro MiG 140 Dead

    If you feel up to it. Below is something to get you started. See if you have power to the control board.

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  6. #6
    Join Date
    Mar 2010
    Location
    Ceres, California
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    Re: Lincoln Pro MiG 140 Dead

    Find a volt meter and connect it to the polarity studs. pull gun trigger. see if you have voltage at this point and your wire feeds. If so, short the gun tip to the work clamp while meter is still connected to the studs. pull trigger, if voltage does not change the miggun is open. If you don't want to take a chance on damaging the tip, feed out 6 inches of wire and put work clamp on the end. if gun good the wire will turn red.
    If you do not have voltage at the polarity studs you have a problem inside the welder case.

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