All owners of JD 445 tractors with Kowasacki 23 hp liquid cooled engines... Beware if you have not fixed it you better or what happened to me could happen to you !!! Plastic cam gear exploded with approx. 1200 hrs. on it. End result upper valve train shot and a $1,200 bill. If you have not replaced the plastic gear with the (yes steel gear) please save yourself some $$$ and do it now !!!