Replaces Old Part Number: 420807 Fits Various Craftsman Models Including: 917288612, 917204030, 917204040, 917253710, 917253711, 917253712, 917253714, 917253715, 917254362, 917254363, 917255737, 917255738, 917288610, 917288611, 917288613, 917288670, 917288671, 917288672, 917288673, 917289470, 917289472, 917289480, 917289482, 917986450 Genuine Original Equipment Manufacturer (Oem) Parts! Helpful Diy Instructions: Installation Guide With Video. This Ground Drive Belt (Part Number 420807) Is For Lawn Tractors. Ground Drive Belt 420807 Turns The Transmission Pulley To Move The Tractor. Wear Work Gloves To Protect Your Hands When Installing This Part. For Craftsman.