This thread has been a huge help with what I'm working on. I have a Lionel 726 with the ATOMIC motor that was "is" my older brothers. These have been in an attic for longer than I'd care to admit. I've fixed the 2018 Scout engine and am now on the 726. When I took the motor out I saw the little bearings stuck in the grease and began looking into the problem. I also was not sure how many went in each end and have tried from 7 to 11 but the thing is still loud and when the shell is on it acts like a speaker for the grinding and vibrating noise. I was working on it this evening when I came across this thread. It seems the issue with mine is the "rear armature bearing" furthest from the worm gear. I think the number is 671M-20 from the pictures posted earlier in this thread. What I was wondering is if anyone knew how to get this part out. I would call it a bushing or a race like in a car wheel bearing setup. It's pressed into the housing and the little balls sit in it with the thrust washer keeping them in place. I need to replace it because it got damaged long ago by being run dry. It's pretty chewed up in there and it's my only guess as to the loud noise. Any help is greatly appreciated, thanks!
P.S. I've found the part online but it simple looks like a bushing with no recessed area to hold the tiny ball bearings...Is there no end to this madness?
