The Satoh ST-4040 is a utility tractor produced from 1977 to 1980 by Satoh. It features a Mitsubishi 2.1L 4-cylinder liquid-cooled diesel engine producing 39.5 hp (29.5 kW) with a 9-speed gear transmission. The tractor has a 4x4 MFWD 2WD drive with an open operator station. It includes a rear JIS1 hitch with position and draft control and a 540 RPM rear PTO. The tractor weighs 3748 lbs (1700 kg) and has agricultural rear tires sized 12.4/11-28.