As some recall from my posts, I participated in modular club railroading for 11 years. You see a lot. I saw engines burn up from too much train and/or too little engine.
I recall one show, a very long and very heavy freight train running. Several MTH diesels were pulling. After sometime, I started smelling the "burning electronics" smell. Train went by, smell died off. Train came back, smell came back. It was running fine but something wasn't right. We shut the train down. The engines were SO hot, we could not comfortably touch them to pull them off the track. Grease was liquefied and running out of the axles on the truck block. I believe one or more of those locos needed professional help once they cooled down.
