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anyone have problems with L/E k870 amptrol?

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  • anyone have problems with L/E k870 amptrol?

    i have a lincoln sq/wave 175, and just the other day i started having a pedal problem. when i barely touch the pedal, i am instantly at full amperage. i have had this welder for about 10 years and have never had a lick of trouble with it. i am just assuming that the pedal is the problem, as i have had similar problems at work with our dynasty 200. any suggestions? repair or replace it? any help would be greatly appreciated.

  • #2
    I've got a brand new K870 amptrol never used . I'll take $150

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    • #3
      Do you still have that amptrol? I am in need of a new one. send me an email so we don't hijack this thread.

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      • #4
        Originally posted by drtrcr1025 View Post
        i have a lincoln sq/wave 175, and just the other day i started having a pedal problem. when i barely touch the pedal, i am instantly at full amperage. i have had this welder for about 10 years and have never had a lick of trouble with it. i am just assuming that the pedal is the problem, as i have had similar problems at work with our dynasty 200. any suggestions? repair or replace it? any help would be greatly appreciated.

        does it do the same when using "local", if not check inside the pedal and check pot, wires back to socket etc

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        • #5
          Get the manual for it from lincolns' web site. Go to the parts section and it should list the values of the pot, (resistance and wattage). Find the wires in the amphenol for your variable output. Put an ohm meter across them and start rocking the pedal. If it goes wide open and stays there, you either have a wire touching something inside the pedal, or your pot went on a permanent vacation. If the readings on the pedal are ok, (from 0 to it's maximum listed value), it's time to start looking inside the welder. Hope this helps. ---Mike---

          pot = potentiometer... Lincoln might call it a resistor.
          BUY AMERICAN... THE JOB YOU SAVE MAY BE YOUR OWN!!!!!

          Hobart Champion 16
          Miller external secondary contactor
          stick foot pedal
          remote voltage control(homemade)
          Hobart Portafeed 17(w AG-2000 control box)
          Bernard Q350 mig gun
          Hobart AG-2000 pull gun
          Lincoln Hi-Freq k799(yes, I know it's red)
          Weldcraft CS300 tig torch
          Miller RFC-23A foot pedal
          Thermal Dynamics Cutmaster 50
          Victor 450/300 series torches
          oodles of connecting cords

          I can fix it, just pay me to replace it first

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          • #6
            Like Jake_SS said. Check the wires back to the amphenol, could be a pinched wire at the socket clamp.
            BUY AMERICAN... THE JOB YOU SAVE MAY BE YOUR OWN!!!!!

            Hobart Champion 16
            Miller external secondary contactor
            stick foot pedal
            remote voltage control(homemade)
            Hobart Portafeed 17(w AG-2000 control box)
            Bernard Q350 mig gun
            Hobart AG-2000 pull gun
            Lincoln Hi-Freq k799(yes, I know it's red)
            Weldcraft CS300 tig torch
            Miller RFC-23A foot pedal
            Thermal Dynamics Cutmaster 50
            Victor 450/300 series torches
            oodles of connecting cords

            I can fix it, just pay me to replace it first

            Comment

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