The Shibaura SD3943 is a compact utility tractor produced from 1980 to 1985 as part of the SD 3 Series. Manufactured by Shibaura in Matsumoto, Japan, it features a turbocharged 1.5L 4-cylinder liquid-cooled diesel engine delivering 39 hp (29.1 kW) at 2750 RPM. The tractor offers a 12-speed gear transmission with an optional 24-speed creeper, four-wheel drive, and an open operator station. It has a rear Type I hitch and a 540 RPM rear PTO. The SD3943 weighs 4055 lbs (1839 kg) and measures 132 inches in length, 60 inches in width, and 78 inches in height. Standard tires are 8-18 front and 12.4/11-28 rear. Related models include the SD3903 and SD4003.