Thank you for all yur comments. When looking at the screw and nut securing the trucks to the tender frame, I discovered a wire to the front truck contact had cjome loose. I resoldered the wire, tichtened the screws, cleaned the wheels, wipers and axles and the loco appears to be running fine.
Thanks again - this fourum is really hel[pful.
Don
Thanks again - this fourum is really hel[pful.
Don