Question about Hobart Handler 140 Mig Welder

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Hi I have a Hobart 135 Handler the problem is the feed motor only works for a few minutes of welding and then slows down or stops the goes slow again.

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First there is a overload for the drive motor incase the welding wire gets jammed. I've had one of these for a number of years and only recently understood the markings on the drive wheels. When the wheel is installed, the markings for the wire size is for the wire you're using. In other words, the marking is towards you but is indicating the size for the rear groove. For years, I looked at the numbers and assumed that they were for the groove closest to the numbers. I had no problem with solid wire, but with flux core all kinds of trouble. So, make sure you have the right groove for the wire size. Second make sure there are no kinks in your hose. Make sure your contact tips in the gun are the right size for your wire and in good condition A person has e a tendacy to make ther drive wheels tighter when the feed slips, this can cause problems for the flux core wire if the correct drive wheel is not selected.

Posted on Jul 04, 2010

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1 Answer

I have a hobart Handler 135 and it won't feed the wire correctly. At first it will feed about 6 " of wire then it goes down to about an inch at a time then it will just click. If you wait awhile it will...


If you completely remove wire from unit does it still slowdown and stop when you pull trigger?
If yes, then 2 most common problems are
A. Thermistor @ position PTC1 on circuit board
B. Drive Roller Motor

To diagnose, locate thermistor @ position PTC1 in upper middle part of circuit board.
It's yellowish round and about 1/2" in diameter.
Jumper Accross the 2 leads, use a small insulated screwdriver or meter probe.


1. Pull trigger on gun, when motor slows or stops then jumper the leads, if it speeds back up then it's the Thermistor
Replace with a Raychem RXE 1.85A @ 72 v
Or comparable, try EBay

2. If no change, isolate motor by removing the 2 leads and connect a 9-12 volt DC battery source, does motor spin? If not then motor is problem. If motor spins and is constant then additional troubleshooting needed, next possible issues are bad resistor or scr

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Jun 06, 2014 | Hobart Handler 140 Mig Welder

1 Answer

Wire feed is not stable on Hobart handler 135


is this a lower end machine ? the cheaper machines take the power from the welding transformer to power the feed motor and as a result the feed isn't stable, also is the wire liner and tip in good condition if not replace them, try blowing through the liner with compressed air to clear any dust from the wire

Sep 17, 2013 | Hobart Welding Tools

1 Answer

Hobart handler 135, the wire starts to feed for about 15 seconds then slows and stops.


Hi:
Don't know how old is your unit but my guess is that your gun's liner is the problem. Have you change it lately? If not, change it. Does your machine just stops feeding the wire or does it shuts down? If it just stop then; is the liner, if it shuts down; then you have a pc board problem.

Oct 29, 2011 | Hobart Handler 140 Mig Welder

1 Answer

Hobart handler 135 wire feeds for about a two feet then stops feed motor runs well under no load


This happens to me all the time. Wear and tear has taken its toll and everything has to be maintained for it to work. Most likely the welding tip is worn and should be replaced. Lincoln electric tips work well and I will replace mine several times during the day. Also check your tension and make sure the wire will uncoil freely from the spool. You can remove the tip and make sure the wire will feed without it. If not, your liner may be worn out. Also a welding Jell will help keep the tip from cloging. It will still happen, but hopefully not on your first weld of the day.

Jan 15, 2011 | Hobart Handler 140 Mig Welder

1 Answer

Lincoln 135 PRO MIG Welder feed stops after a few minutes


1/4" plate with a 135 amp machine is probably beyond it's duty cycle abilites. If you are using a mixed gas, and pushing the max on the settings, it will be cutting out because it is designed to.
You might want to get a higher amperage welder for consistent welding of 1/4"
The 140 Pro maxes out at 5/16" using inner shield wire. and 1/8", or 10 guage with gas.

Mar 19, 2010 | Welding Tools

1 Answer

I have a Hobart handler 120/90amp wire feed welder.When i try to weld,all i get is a small spark.I turn it off,turn it on and it does it again.The wire feed works good,it just sparks,but will not keep...


I have welded countless hours with Linde & Lincoln & even a few Hobarts & the only time that I ever had the same problem was when the ground connection either to the object I was welding, or the welding cable ground wasn't good & clean & tight. Same on stick welders also. I did develop the habit of grinding not only where I was preparing to weld, but where I was placing my ground clamp & that always provided a better "frying bacon" sound as I went along the business of pushing a bead. In a welder, the only other thing than that is involved is the step-up transformer and your wire. Hope this helps.

Feb 01, 2010 | Hobart Welding Tools

1 Answer

I have a hobart handler 135 motor stops feeding


Take the drive motor off and blow out dust, chips, wire pieces, etc. and then rinse out with contact cleaner, blow dry, re-install. Had to do this every so often with mine. Hope that helps.

Jan 05, 2010 | Hobart Handler 140 Mig Welder

1 Answer

Hobart handler 135 feed motor for wire doesn't feed wire. motor is ok I tested it with seperate power source. No power to motor from main board or ??????


check the SCR ,looks like a big transistor mounted
to a heat sink or some of the older units had a relay
in-line with a fuse , I have a older Hobart and it is
a great little welder. If you snap a pic of the P.C.
board and email it ill rsheehan@northernsteeldesigns.com

point out what parts to check.and replace.

Rob

Dec 06, 2009 | Hobart Handler 140 Mig Welder

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