EMD normally uses TR in a traction motor designation to mean tapered roller bearings for the motor support bearings on the axle as opposed to the oil-lubricated plain bearings.
What would be the difference between a D78 TR and D78 BTR motor?
Also, does EMD still manufacture these?
MEC407 Moderator:
Pan Am Railways — Boston & Maine/Maine Central — Delaware & Hudson
Central Maine & Quebec/Montreal, Maine & Atlantic/Bangor & Aroostook
Providence & Worcester — New England — GE Locomotives