Have a Marx FT Diesel that came to a grinding halt today. Reversing became erratic, unit began to run more slowly and started to overheat. Finally stopped altogether.
So far:
- have checked all wiring
- cleaned commutator and checked brushes
- replaced e-unit
- checked for broken wiring on motor armature
Result: motor will not run on track, but will jerk to life briefly when power is applied directly to brush holders.
There appears to be a short somewhere, but where is it? Is there something potentially wrong with the field coil and/or armature?
Is there any hope or reviving this motor?
