I replaced a LOT of idlers on Fisher decks, too. Particularly this guy:
The Hitachi/RCA idler (RCA #164113--isn't it scary how some of these numbers stick with you even 25 years later?) was another "fast mover", but at least it was designed in such a way that it could be swapped out in seconds with no tools. One shop I worked at had a tech who had small enough hands that he could reach in through the front-load door and swap those idlers out without even taking the cover off...
