Years ago we found an older gentleman who understood these unique motors and would "recondition" them for us. Ruben passed on some years ago and we have been searching for another individual to take them on for us but alas, all the specialty places we send them to say, "No way, we do not know how" or "These just were never designed to be serviced."
Armed with what Ruben shared with me, Felix, Richard and I decided we would tear into a few dead ones and see what we could do to resurrect them...