The Shibaura SD4003 is a compact utility tractor produced from 1980 to 1985 as part of the SD 3 Series. Built in Matsumoto, Japan, it features a 2.1L 4-cylinder liquid-cooled diesel engine producing 40 hp (29.8 kW). The tractor offers two transmission options: a 12-speed gear with 12 forward and 4 reverse gears, and a 24-speed creeper with 24 forward and 8 reverse gears. It has two-wheel drive and an open operator station. The tractor weighs 3619 lbs (1641 kg) and measures 133 inches in length, 60 inches in width, and 76 inches in height. Standard agricultural tires are 6.00-16 front and 12.4/11-28 rear. The rear tractor hitch is type I, and the rear PTO operates at 540 rpm with a 1.375 inch shaft.