In Reply to: Thermaldyne Pak 50 tech manual posted by brian on 07/29/02 at 7:22 AM:
Hmmm, if the machine turns on, and when you press the trigger nothing happens. It is likely that you are missing the "parts in place" spring. It is or was located in the nozzle. It jumpers a couple of metal saftey pins. If there is simply no power, then you'll have to remove the halves on the case and replace the circuit board fuse.
As for installing a Miller torch, I wouldn't advise it do to parts cost. If your torch is bad, replace it with the brand name RPT. I think it's owned in some way by T-dyne, but the gun is much cheaper than factory, and uses the identical pieces. You'll find that there really are not alot of "clone" parts for the Lincoln and Miller guns, but plenty for the T-dyne and Hypertherm brands.