My 671 from 1948 was running fine then stopped. The e-unit would cycle but the motor would act like it wanted to run but seemed to be binding. I took it out, rolled the chassis to see if something was binding it but it rolled freely. loosened the brush plate cover and cleaned the armature as best as I could and also cleaned all the grease on the gears. Turned the armature by hand and did not feel any binding. What am I missing? Does anyone think its the motor or is it the e-unit. Usually on my other locos when the e-unit goes bad the motor doesn't try to run. Any ideas?
Thanks
Bruce