The Caterpillar Diesel Sixty is an agricultural crawler tractor built in 1931 by Caterpillar in San Leandro, California, USA. It features a 17.9L 4-cylinder liquid-cooled diesel engine producing an estimated 85.6 hp, with tested drawbar power of 65.11 hp and belt power of 77.08 hp. The tractor has a 3-speed gear transmission with 3 forward and 1 reverse gears and uses crawler drive. It weighs 24,390 lbs (11,063 kg).