The Fahr D400A is a farm tractor produced by Fahr from 1955 to 1960 with a total of 223 units built. It is powered by a Deutz F3L514 4.0L 3-cylinder air-cooled diesel engine producing 45 hp (33.6 kW). The tractor features a ZF A23 7-speed gear transmission with 7 forward and 2 reverse gears. It has two-wheel drive, manual steering, and an open operator station. The dimensions include a wheelbase of 91.3 inches (231 cm), length of 143.7 inches (364 cm), width of 73.4 inches (186 cm), height of 92.9 inches (235 cm), and a weight of 6220 lbs (2821 kg).