Miller matic 140 Mig Welding Package W/As 907335 - Answered Questions & Fixed issues

liner into torch then swan neck and finally through the tip

The CP-300 and CP-200 were never designed to run on single phase. You can buy a 3-phase generator (see military surplus) or a phase converter. You will need a pretty big one - like one rated for 20hp to use the full potential of the welder. That is also pretty expensive - say $1000. However, if you have a shop, you can buy used 3-phase equipment sometimes significantly cheaper than 2-phase stuff. So you buy that expensive converter and save money on all the other equipment you will buy. Or sell it. Or scrap it - some older welders had big copper wound transformers - a few hundred bucks worth of copper.... some had aluminum though... Good luck.

Your Linner of the gun could have a kink in it.

Follow this link...http://www.millerwelds.com/om/t225716g_pt_mil.pdf
or copy and paste it at your web browser.

First thing to check is that you still have an inlet guide (plastic funnel like) before the drive rolls. This one can be dirty or have enough build up inside that makes the wire feed imposible. Change this one if possible, it will cost you around 5 bucks at your near welding shop. If everything looks ok, then make sure you have the right drive rolls size, 023 or 030 in this case. Then ckeck you liner if it has a kink or dirty in the inside (use compressed air to blow the inside of the gun) then it's useless, change it. Final will be the contact tip just replace it for the right size according to the wire size.

579 at any praxair location.

well theres a couple things it could be. first make sure the surface is clean. second check the type of metal the horseshoe's are made of. its really hard to get welding to stick to pot metal.

Check inside grounding, if everythinbg looks good, need to be service by a pro.

fan or relay problem welder is protecting itself from burning up when it cools off will run fine check relay or fan

check that its got a good earth,,then strip the handel and check the triger switch

Make sure that wire feed wheels are tight and the tip is clean

You may be exceding the duty cycle of your welder
Check your operstors manual to see how long you can weld at higher amps before giving the welder a chance to cool down

This is the link to the owners manual to the pro hobby helmet. Now it doesn't necessarily instruct you how to replace the headgear but there is a schematic you can follow hope this helps
http://www.millerwelds.com/om/o231425c_mil.pdf

Too much tension would smash your wire and it would not run correctly. Are you sure you are using the correct size rollers for the wire you are using. Rollers come in various sizes and applications. A knurled roller is used for flux cored wire. Make sure you sizes match up. They are stamped on side of rollers. Good luck!

• Is the power pin located correctly so that the gas input is aligned between the o-rings on the pin?
• could be blocked by an old, dirty liner.
• Spatter could be clogging the gas ports on the gas diffuser.
• The gas solenoid could be sticking in the machine.

There is a large electrolytic capacitor probably clamped and bolted to the floor of the unit. Size-wise about as tall and fatter than a 12 oz. drink can. This supplies filtering to the DC used for the wire feed motor and since these wonders come from China, they don't live forever. If memory serves, it is 47,000 uFd @ 75 volts DC. You should verify that value, it's been a few years.
Since the nominal value of this exceeds the range of most RCL meters, it has to be replaced on faith or one can accept the reading one gets from such a meter since mine read on ~ 150 uFd., a fraction of its specified value.
I think you can get another (Chinese) capacitor (we aren't making these anymore) for ~$45 US from (or through) the dealer.

Look for a reset button on the case. Make sure that you have power to the machine and at the power socket. If everything looks ok outside, you may have to investigate your warranty. Good luck!

If its a new unit its probably nothing. Miller makes good stuff. Open the side so you can see the spool. With the machine on, press the trigger for a second. Did the little wheel spin (trying to feed the wire) if it did then your problem could be kinked wire, **** on tip, or spring on small spool is loose and wire is slipping. Let me know.

Give the whole welder a good cleaning and then look for a short to ground.

hi try this site
http://www.kemppi.com/inet/kemppi/en/akp.nsf/frameset/Frameset?OpenDocument&left=/inet/kemppi/en/akp.nsf/WEB_Nav?OpenView&navcat=Product Manuals&main=/inet/kemppi/kit.nsf/ProductManualsAll?Openview&ExpandView&top=/inet/kemppi/en/akp.nsf/Top?ReadForm&topcat=Product Info