Welding Tips and Tricks

Took a chance and bought an estate sale Pro Mig 140. It's got some parts missing.

So trying to find a parts diagram is frustrating to say the least. Since I don't know what to call it, but I know where it is, ordering parts is a crap shoot. I've been to the Lincoln parts page, it's not much help at all.

https://www.lincolnelectric.com/en/Service-Navigator

The first part I need is the Wire Reel Spindle, which is I believe part number 9SM15445-1. I found one on Amazon here: https://www.amazon.com/Lincoln-inch-Wir ... 948&sr=8-2

The 2nd part I need is a fitting for the gas line at the rear. There is a female fitting at the back of the machine; turns out it isn't National Pipe Threads as I hoped. I found a gas line assembly part number 9SS19303. There is a version available here for $60: https://www.weldingandcutting.com/Gas-H ... 300138.htm The thing is I only need a pipe fitting at the back of the machine for my air hose from my existing CO2 regulator (male pipe thread to 1/4" barbed fitting). The link to the air line says that it's 5/8-18 fittings. I've looked at McMaster-Carr, no 5/8-18 fittings.

Anyone have any ideas here for a fitting besides buying an air hose I don't need?

Where can I find a decent parts diagram and parts list for this machine?

Thanks,

Arc Zone has a lot of fittings....this is likely what you want:

https://www.arc-zone.com/Hose-Repair-Ki ... 6BR?cPath=&

G-ManBart wrote:Arc Zone has a lot of fittings....this is likely what you want:

https://www.arc-zone.com/Hose-Repair-Ki ... 6BR?cPath=&

Thanks! Nice to know it's not some unobtanium!

Got everything hooked up and turned the power on: No gas out of the nozzle. Which means to solenoid valve is kaput or worse - the electronic board is kaput. Since the welder works otherwise, I'm going with the gas solenoid being bad.

anyone have a good procedure for testing a gas solenoid? I'd rather test and know before risking another $85 or so for as new solenoid valve.

Thanks!

Sure. Disconnect the solenoid from it's power source. Determine what the supply voltage is, then use a jumper lead from a known power source to exercise the solenoid. You can also test the solenoid feed circuit to see if there is a signal there or not?

Does the regulator show signs of flow when you pull the trigger. If so the solenoid is ok.

I have this same welder and had gas flow. When I pulled the trigger I could see the regulator change. Gas was flowing but not out the nozzle. I took the machine apart and found the hose from the solenoid to the gun was not connected to the fitting. Must never have been connected. It was tight when I pushed it on.

Thanks but it turns out the problem was multifold:

Gas regulator got turned down somehow, probably while being moved.

The gas would flow, but then leaked at the power block/mig gun cable connection. After fooling with it several times, I noticed the gun cable cover had slipped down towards where it mates with the power block, preventing full insertion, even though it gave all indication it was fully inserted. Pulled the cable back, cable seated perfectly; gas now coming out of the gun.

Life is good. Thanks for the help!