Posted August 16, 2010 - 06:15 PM
The distance between the two pulleys is not fixed since the variable drive pulley moves forwards and backwards to change the speed of the transmission drive belt. However, the front drive belt is meant to be 45 inches OD, and this should be a loose fit around the outside of the variator sheaves and around the pulley off the engine so that it slips when when the variator is in park position. In this position, the variator shaft should also be engaging the brake rod by 1/16th of an inch. So - theoretically you can set the position of the variator to engage the brake (no movement of tractor forward and a little bit backward), then position the engine to allow a 45 inch belt to be a loose fit around the two pulleys. How you do that in practice I am not so sure... Good luck!