Just built a hurry up build on a 112 for my grand daughter, got the tractor in a bunch of 5 gal bucket and milk crates. 2 weeks later we pulled it, cut out over 120 lbs. of useless parts including the variator and went with the single belt. We had trouble with the belt not releasing with the JD pulley, looking through the parts we found a belt guard. This thing bolts to the block and extends forward of the pulley about 1", it acts like a belt guide on the top and bottom of the pulley to keep the belt from coming off the pulley and when the clutch is released it lets the belt move forward to release it from the pulley. It is a JD factory part, basicially a piece of 1" 1 1/4" flat bar bent in a "U" shape with some brackets to mount it to the block. All the head scratcin and thought trying to reengineering to solve a problem and JD already had the part.