Question about Welding Tools
I have a Miller Big 40 welder, serial # HD71116, that was welding perfectly about a month ago. It isn't used often. I tried to weld with it today and it would not weld or run A/C tools from the outlet. The motor runs fine and the welder/generator seems to be running but produces no current. I have a wiring schematic and physical drawing of the welder. What could be the problem and what should I check first? Thanks for any help you can provide.
Open inspection door,which also the fine tuner knob is ,there's a 2x4 size circut board that snaps out with little force to remove,this is the voltage regulator board,look for 4700 ohm resisitor burnt into,tv tech can fix or order new board at $227.00 what i paid.
Posted on Feb 04, 2009
Check to make sure that the throttle is reving up. I have the same machine and have had the same problem, the short fix I used was bailing wire on the carb. LOL. Turned out to be my idle solenoid.
Posted on Mar 11, 2010
The first place I would look is to check the brushes that ride on the slip rings and make sure that they are making good contact with the slip rings and clean the slip rings with either an armature stone or some scotch brite. If the brushes aren't making contact then there is no output.
Posted on Nov 26, 2014
Ok boy your welder have a riostathic control check contacts of your control maybe have dirt or grease
Posted on Mar 01, 2009
Not familular with this unit, however, check the power rating of your tools against the rating of the outlet, some generators will cope with lighting only and will fuse if a power tool is used under load ,
lets know the outcome of this first then we can move on....................
Posted on Jan 23, 2009
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Posted on Jan 02, 2017
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