When I bought my SB13 it made a huge racket when I used the gearbox. I used this to negotiate a better price. When I got it home, I tore it completely down for a refurbish before moving it into my basement. What I found was the 2 shafts that carried the gears had worn the oilite bushings in the case tremendously. On 2 of them, they had worn through completely, to the cast iron. The shaft ends had also worn down, the worst was down to .955". I put in all new bushings, and sleeved the shaft ends that ride on the bushings back to 1". ?I cleaned everything out of the oil holes, installed new felts and all is good now.
