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Lincoln SA 200 troubleshoot help?


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Old 07-10-2008, 02:09 AM
123weld 123weld is offline
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Default Lincoln SA 200 troubleshoot help?

My first question is does anyone know of any repair or trouble shooting aside from from weldmarts cd or what little info lincoln ever provided on the generator end. My SA 200 has no auxillary output and has only the faintest tiny spark when you attempt to strike an arc. Visually all the obvious wires, connections etc. look alright. Following weldmarts steps, I unbolted the two spliced wires under the commentator to take some ohm readings between them and the positive exciter brush and outer rheostat wire, in hopes of diagnosing exciter field coils. The positive brush to solid wire from right hand coil gave a consistant 180 ohms. The stranded wire w/ the eyelet on end to outer rheostat gives a 180 ohm reading also, but it doesn't stay at 180, it jumps down to much lower ranges and stays in lower ranges most of time.

I went to another SA 200 which welds just fine. Ran the same tests which I described above. 180 on the positive and the low jumping around on the stranded wire to rheostat.

I went back to the troubled SA 200 and flashed the coils, no luck there. Its got a 0-64 ohm rheostat. I checked it, it reads about 25-89, still a difference of 64 ohms though. I don't know what to do next. I believe I have reason not to trust weldmarts procedures all the way. I don't mean to down talk them or bash them. Even if there is a problem deeper down in the generator, it seems I should be able to get auxillary output. Anyone have experiance w/ this or know of any methods of testing different components in the welder?
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Old 07-10-2008, 07:20 AM
John in Maryland John in Maryland is offline
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Default Re: Lincoln SA 200 troubleshoot help?

You've got a bad connection somewhere.
I've got a Lincoln G8000 that did the exact same thing. I found one of the connectors on the field bridge rectifier had corroded. I replaced it and put dielectric grease on it too. I then pulled all the other connectors cleaned them and applied dielectric grease it's been working fine since.

J.I.M.
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