The Keck-Gonnerman 18-35 ZW is a standard-tread farm tractor produced from 1928 to 1937 by Keck-Gonnerman in Mount Vernon, Indiana, USA. It features a Buda 6.3L 4-cylinder liquid-cooled kerosene engine with a hand-crank starter and optional electric starter. The tractor has a 2-speed gear transmission with 2 forward and 1 reverse gears. It delivers 18 hp at the drawbar and 35 hp at the belt, capable of pulling 3 or 4 14-inch plows. The tractor is two-wheel drive with spur gear final drives and manual steering, and it has an open operator station. Dimensions are 132 inches long, 70 inches wide, and 67 inches high, weighing 5250 lbs. It rides on 50x12 steel rear tires and includes a belt pulley 16.5 inches in diameter and 8.5 inches wide, running at 585 RPM and 2600 ft/min speed.