Big Bud 400/20

The Big Bud 400/20 is a four-wheel drive (4WD) farm tractor produced by Big Bud from 1979 to 1981. It features a Detroit Diesel 12.1L 8-cylinder turbocharged diesel engine producing 400 hp (298.3 kW). The tractor has a 12-speed gear transmission (Fuller Roadranger RT 12513) with 12 forward and 2 reverse gears. It is built with planetary final drives, articulated power steering, pneumatic drum brakes, and a Cruiser Cab with air-conditioning. The hydraulics system is a closed center load sensing type with 4 valves, 36 gpm pump flow, and 35 gpm steering flow. Dimensions include a 150 inch wheelbase, 267.6 inch length, 120 inch width, and a shipping weight of 40000 lbs. Tires are available in sizes 24.5-32 and 30.5-32 for both front and rear. Electrical system features a negative ground, alternator charging system with 75 amps, and a 12 volt battery. The original price was $109,000 in 1978. The 400/20 variant uses a gear shift transmission, while the related 400/30 variant uses a power shift transmission.