I Just acquired a Bachmann 4-8-4 Northern Loco. The seller said it ran, but sluggishly. When I received it it would not run. The motor turned but the drive wheels didn't. It looks like the axles are slipping and the rear drivers pull out. Comments I have found say that is always a problem with the old Bachmann steamers. The common fix is to super glcue the axels back in. The problem initially was the quarter was off since the axles slip. Any advice to fix this? I contacted Bachmann service repair. 6 weeks out and no guarantee they can fix it because the loco is too old. Any help is appreciated.