How do you remove the entire clutch assembly from the rear shaft of the engine to replace the rear main seal on a 2004 737 Z Trak? I removed the retaining bolt on the end of the shaft, but the clutch seems stuck on the shaft and won't slide off the shaft as the John Deere manual indicated it should. Dealer said "pry it off with a screwdriver" but it looks like that will bend the pulley or break the aluminum case.