The Sheppard Diesel SD-2 is a row-crop tractor produced from 1949 to 1956 by Sheppard Diesel in Hanover, Pennsylvania, USA. It features a 2-cylinder liquid-cooled diesel engine with 24 hp (17.9 kW) output, an 8-speed gear transmission with 8 forward and 2 reverse gears, and two-wheel drive with spur gear final drives. The tractor has an open operator station, manual steering, and mechanical drum brakes. It is equipped with a rear PTO of 540 rpm and a belt pulley with 8.25 inches diameter. The SD-2 was built in variants including row-crop, orchard, and grove models, with a total production of 257 units.