Question about Hobart Handler 140 Mig Welder
Basic electricity, + and -, electricity needs a metallic path to follow, on the - side, start by inspecting the connection where the ground cable plugs into the machine. These connectors often wear out and sometimes they lose their connectivity. Wiggle it, feel it, visually inspect it, move on down the cable, are there any splices? I've seen them spliced in numerous places with black tape everywhere, and the owner's standing there scratching his head wondering... Check where the cable attaches the clamp, is it secure and tight? If you're satisfied the ground side is in good condition, then troubleshoot the +side. Now, how the torch side works is there are two electric paths that need to have connectivity. The first is a wire that connects inside the cover of the welder, runs all along the whip to the trigger, where it's connected to a switch (trigger), then follows back down the whip to the machine. If anything happens when you squeeze the trigger then this is all working properly, logical? If nothing happens, check the connections we just discussed. The other path is how the high voltage gets to your work. At the machine, connected to the wire drive is the liner of the whip. Where this is clamped to the drive is the connection, inspect it. then the electricity travels down the liner to the contact tip, which is how the electricity gets into the wire. If they put the electricity into the wire at the machine, the wire would be glowing red hot and melting all through the whip, because the resistance is the same as at the tip of the wire, get it? But the liner itself is heavier metal than the wire, so the resistance is less, so it doesn't heat in the liner, following? So if you pull the shield off the end of the handle, you'll see the contact tip that connects the + liner to the moving wire inside. Inspect it closely. If you still have no current flow after these inspections, there's still hope. Somewhere on the machine there should be two or more fuses. Find them and inspect them, if any are burnt, be sure to replace it with the same size and amp fuse. I'm sure that if you follow these steps, your welder will be working just fine before you know it. Please post back your results.
Posted on Feb 08, 2009
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Posted on Jan 02, 2017
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