Well, a few years ago the electric PTO fell off. Somehow the bolt came loose. Anyway, I decided to fix it this weekend. I got a new bolt (original was lost). I remembered the trick of putting rope in the spark plug hole in order to stop the shaft from turning while tightening the bolt. Well, I kept turning the shaft and checking the depth of the piston with a screwdriver. I turned it in the direction of tightening the shaft bolt. It didn't seem to be moving much at all but I'm sure...
John Deere 111 & PTO issue
John Deere 111 & PTO issue