How do I connect the argon line?

[James2]

Got the new machine (Maxstar 140), and new torch that was taken off a Maxstar 150. Can't find the place to hook up the argon line. Am I missing a piece that I need? I downloaded the manual from the Miller website, but didn't see any details there. Any help appreciated.

Thanks,
James

[James2]

The torch I picked up is: 1712RDI25 from a Maxstar 150. Is this not compatible with the Maxstar 140? Do I need one with a gas valve?

Thanks for any help.