The Caterpillar Diesel Thirty-Five is a crawler tractor produced by Caterpillar from 1933 to 1934 in Peoria, Illinois, USA. It features a 3-cylinder 8.5L diesel engine producing 39 hp at the drawbar and 45 hp at the belt. The tractor has a 4-speed transmission with 4 forward and 1 reverse gears and is designed with a crawler drive. Track gauge options include 53, 56, and 75 inches.