I got the pump to work, it had dried out coolant sticking the vanes. I took it off and soaked it in some vinegar and hot water. I thought I needed a new pump, a quick google search showed that they use this PROCON pump on espresso machines, They get gunked up sitting for a long time and people soak them in acid to free them up. worked for me!
She plugs into the back of the unit, so when you flip the power switch on the welder it turns on.
Now I just need some argon. Pretty sure the cylinder I have is out of date, it also has 750psi of 75% argonx25% co2 mix. Any takers in Fort Collins?
How much is a large tank of argon going for these days if you own the tank? I don't want to get screwed.