The most annoying feature of my JD 445zt is that the drive pulley (sheave for purists) for the mower deck seems to have a magnetic attraction for flying wood chips or, most often, sweet gum balls. They lodge perfectly in the belt groove with the usual result that the belt pops off before I can react to shut down the deck. If I can shut it down quickly enough it's easy to remove the offending obstruction---just turn the pulley til the chip/gum ball is visible, then flick it out with a finger. Not fast enough: the belt pops off, and four out of five times the belt squeezes through the keeper on the tensioner pulley, turning a five minute job into a half-hour one.
Shown here is I'd guess the fifteenth or twentieth sweet gum ball I've collected.
Shown here is I'd guess the fifteenth or twentieth sweet gum ball I've collected.