Hi all.I have a old/old Airarc 3025 made by miller plaza cutter.I can not get any arc out of the gun.This runs on 220 volt and auxillary air.It runs,i have air input at 80 psi and decreased at regulator to 40 psi.I turn switch on and the air is constantly comming out of the gun.This thing is so old the gun does not have a trigger on it.Any help much appreciated.Is there any way to get a owners manual?Thanks Newbie:welded wrenches Great Site Here.