Lincoln Welding Tools - Page 5 - Recent Questions, Troubleshooting & Support
Brand new Lincoln pro-mig140 will not arc at all what can the problem
all wiring connected inside by the wire reel, like where the power comes into that area so you can reverse the polarity. is the machine powering up? Lights on front, fan running etc? wire moving through liner? Check your ground clamp wire, make sure the liner is making contact inside the gun tip. Check plug wiring on both the welder and the socket, makes sure they are both wired correctly as well as tightened down securely/ I've seen plugs that were new from factory but had 1 wire not connected to a post, cut too short and just left it.
also check that the outlet is wired the same as the plug on the machine. they need to have the 2 hot wires correct you'll see red, black, white & green. red & black are hot and need to go to the red and black from the wall.
Why does my lincoln 140c cut out?
Had the same issue with a friends SP125
Just got to looking at the Welder. Here's what I found. Yes, the Drive motor would thermally shutdown even if I holding the trigger and not welding. Ends up that there thermo sensor is not too sensitive, it ends up that the two pointed nodes on ether side of the Drive wheel were gummed up. A simple loosening of a screw to get them out. Cleaned them with Brake Cleaner and a paper clip and it took all the restrictions out. When trying to pull the Wire out of the Gun it too was tough to get out. Added some mineral spirits to that ( figured Brake cleaner was too aggressive) and it helped a lot. Working good now.
Low voltage at recepticials
If the front DOES NOT say "chopper technology", then the fine control knob MUST be turned all the way up for full aux power. Low engine RPM can also cause this issue. If your meter can read frequency, it should read a little above 60 Hz at full speed with no load.
How do you split the engine from the armature on older Lincoln Red Face welders?
Remove the roof, front panel, exciter brush holders, exciter nut, centering collar, exciter armature, exciter frame, generator housing, then the main armature. Support the engine carefully while doing this. I am a certified Lincoln tech and I do this monthly. Cutting the bars in the bell housing to get to the flex plate bolts can lead to a broken crankshaft. I have a poor fellows broken crankshaft here to prove it. So, please do it correctly and carefully. Also, change the armature bearing. It's cheap insurance.
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