Question about Hobart Handler 140 Mig Welder

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Wire feed is sticking when I try to weld. If I increase friction it only jams the wire. I have never cleaned of replaced the liner. Is this my problem? I don't use this welder that much.

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  • jdh45890 Oct 17, 2010

    "sticking" to what? the part you're welding? Or in the gun? To eliminate the gun liner lay out the whip straight and try to feed wire thru it without a tip in the gun. If if feeds ok then it is probably the tip.

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  • 223 Answers

Cleanliness is important when it comes to Mig welding. Any rust, dirt, dust, oil is liable to be deposited in the whip liner. If it's just a dirty liner you can try cleaning it with a solvent that doesn't leave an oil deposit (electric motor cleaner, brake cleaner, that sort of thing) compressed air and flexing of the whip.

Make sure your whip hasn't been crimped, if it has then no amount of cleaning will restore it to operation.. a new liner is the only reasonable answer.

It's possible that a bad tip can cause feed issues. Miller type tips are the worst, in my experience, sometimes you just get a tip that will weld to the wire when the current passes between them. I've worked in shops where I might go through three tips in five minutes and then hit one that would last all afternoon. If the wire sticks and you can hold the gun up and rotate your wrist and you feel a 'pop' and the wire jumps out of the tip then just change the tip out. Excessive roller pressure with a tip that's sticking to the wire can really make trouble for you. Nozzle dip is your friend sometimes with tip sticking issues.

Copper clad wire is not particularly friendly to liners, the copper is liable to flake off in the liner. I use bare wire, I bag the wire in a plastic bag on the feeder and I wrap a scratcher pad on the wire just before it goes into the feeder and I find that I have few feed issues. Wire that has even a trace of rust should be discarded as it will both fill your liner with rust and give poor quality welds.

lp

Posted on Dec 24, 2010

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My welder won't feed wire it sounds like it's trying to energize but can't. A couple of times it fed through but wouldn't feed to weld so I had stick weld. What happens if the liner has a restriction?


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You need to replace the gun's liner. To avoid this problem you must decrease the voltage or increase your wire speed.
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Jan 10, 2010 | Saws

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Aug 06, 2009 | Welding Tools

1 Answer

I have a pro-mig 135 and while welding the arc surges up and down along with the wire feed.the feed is real jumpy and will not keep a constant smooth puddle


You need to clean and perhaps replace the liner in your wire feed gun. The liner gets tiny bits of dirt and **** up inside. After even normal use for a while, the liner itself gets worn away and makes the wire stick rather than smoothly poke into the puddle.

Liner maintenance time is also a good time to check the feed wheels for wear, look for the little ruts in the wheel to be dull or obviously worn at the edges. Wipe off the drive shafts and housing as long as you've got the drive wheels off anyway. :-)
All of this should have a nicely illustrated procedure in your user manual.

The other thing that can cause problems is that the welding wire can sometimes get rusty enough to be sticky inside the liner. Roll off a good length of wire (2 or 3 wraps around the spool) and inspect it for any sort of funkyness. If in doubt, blow out the liner, change the wire, and weld something to see if it works better.

Regards,
Carl

Jan 24, 2009 | Welding Tools

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