Why wont my john deere 445 lawn tractor go forward or backward after changing the hydrostatic motor bearing It starts it just wont go?

If your JOHN DEERe 445 lawn tractor won't move after changing the hydrostatic motor bearing, it could be due to a few reasons. You may have improperly reassembled the hydrostatic transmission, leading to a lack of hydraulic fluid flow. Additionally, ensure that the drive belt is correctly tensioned and not broken. Check for any air in the hydraulic system, as this could also prevent the tractor from moving.