Caterpillar Twenty-Eight

The Caterpillar Twenty-Eight is an agricultural crawler tractor produced from 1933 to 1935 by Caterpillar in Peoria, Illinois, USA. It features a Caterpillar 4.5L 4-cylinder liquid-cooled gasoline engine with an estimated 41.7 hp. The tractor has a 3-speed gear transmission with 3 forward and 1 reverse gears, and a crawler drive. It has an open operator station and a rear PTO type of 540 (1.375). The tractor weighs 7870 lbs (3569 kg) and measures 116.1 inches in length, 61.5 inches in width, and 60.6 inches in height. The belt pulley diameter is 11.75 inches with a width of 6.5 inches, running at 935 RPM and a speed of 2580 ft/min. A total of 1171 units were built. The Twenty-Eight succeeded the Caterpillar Twenty-Five model.