Allis Chalmers HD21

The Allis Chalmers HD21 is an agricultural crawler tractor produced from 1954 to 1965. It features a powerful 13.8L 6-cylinder supercharged diesel engine delivering 225 hp, coupled with a 2-speed torque converter transmission. Built in Springfield, Illinois, USA, the HD21 is designed for heavy-duty farming tasks with a crawler drive, contracting band brakes, and an open operator station. It weighs 45,500 lbs and measures 198 inches in length and 99 inches in height. The tractor's fuel tank capacity is 135 gallons, and it has a coolant capacity of 80 quarts. The HD21 is known for its robust construction and reliable performance in agricultural applications.