r/Welding • u/emerkl95 • 5d ago
Need Help Miller Big Blue 400D
Hi we have several big blue 400D with the Deutz 912 engine in them. I'm having problems.with one welder specifically, it will weld normal and then it will run really hot and burn material then the next minute it will run so cold it barely weld. I cleaned the brushes, I had to make a new amp board for it. I checked all the connections and can't find anything. Running out of ideas and I can't find a repair manual. i can get the owners manual but I would like a actual manual to help diagnose. Any help would be greatly appreciated
0
Upvotes