I have a postwar NW2 switcher #623 that had been running perfectly, with a perfectly operational e-unit, that just suddenly stopped while running a couple weeks ago. I have let the engine sit until one of my grandchildren comes over so I use the engine repair as an educational experience. I am sure the repair will be simple, as all postwar repairs usually are. I want to show my grandson how much info about the cause of the problem can be deduced without even taking the engine apart. I also want him to do the repair, including any soldering required, so he can experience the satisfaction of a successful engine repair.
He will be coming over, either tomorrow or the next day and the repair will commence.
Earl