The Sheppard Diesel SD-1 is a 1949 utility tractor built by Sheppard Diesel in Hanover, Pennsylvania, USA. It features a 0.5L 1-cylinder air-cooled diesel engine producing 4 hp (3.0 kW) with indirect injection and a 3-speed gear transmission with 3 forward and 1 reverse gears. The tractor is two-wheel drive with manual steering and an open operator station. A total of 14 units were built. It weighs 1100 lbs (498 kg) and is capable of pulling 1 plow.