Fordson Major Diesel Tractor Fuel Injector Oil Seal. Shown as item # 34 in the attached parts schematic picture. These seals are Genuine OEM Ford Tractor Operations replacement parts. These seals are used on tractors with an 8 wide cylinder head. This listing will be for a package quantity of. Fordson Major 5000 Diesel Tractor Models, from the years 1953 to 1964. May fit additional models not listed.