My John Deere Hydrostatic Mower will not engage the Mower Deck. It was working and when I mowed through some thick leaves it threw the belt off. I replaced the belt and can see and hear the mechanism move slightly to engage but not enough. What can I do to effect a repair? Is there a key way in the shaft? The Mower will go forward and reverse but the blades will not engage. What can I do to effect its operation? It was working and after putting the belt on it will not engage the mower Deck. Tries to but, does not. Please help with a response. The fuse is OK it attempts to move but not enough to engage.Please answer soon.

Sincerely,
Steven L. Frazier

Oops my comment didn't pertain to this