The Shibaura SD3903 is a compact utility tractor produced from 1980 to 1985 as part of the SD 3 Series. Built in Matsumoto, Japan, it features a 1.5L turbocharged 4-cylinder diesel engine delivering 39 hp (29.1 kW). The tractor offers a 12-speed gear transmission with an optional 24-speed creeper, two-wheel drive, and an open operator station. It has a rear Type I hitch and a 540 RPM rear PTO. Dimensions include a length of 132 inches, width of 60 inches, height of 76 inches, and a weight of 3643 lbs. Standard tires are 6.00-16 front and 12.4/11-28 rear.