Trying to find a manual or diagrams for this welder I picked up. No power, no weld. I did find a bad rectifier and replaced it but no luck. IÂ’m afraid the stator windings are bad but IÂ’m unsure on how to check them. IÂ’ve cleaned the slip rings and flashed the rotor, but all I get is a tiny spark. Hoping someone has some experience with these. I really want to get it up and running.