That was very brave of you! It is normally strongly advised not to try this at home, since it usually results in Boing! Ping! Whirr! Splat! as springs, contacts, and ball bearings shoot out into all corners of the garage, followed by the sound of much loud swearing. In your case you did it logically, with photos and separate storage for each cam segment.the problem here is the Weld Current/Voltage selector switch, I had problem with mine and stripped it down
[ I actually have one of these 140E MIGs, which I bought as "Spares or Repairs". The square steel operating shaft of the rotary switch has sheared in two, halfway down at the circlip grooves.]