McCormick-Deering WD-40

The McCormick-Deering WD-40 is a standard-tread farm tractor produced from 1935 to 1940 by McCormick-Deering, a part of International Harvester. It was built in Milwaukee, Wisconsin, USA. The WD-40 is a diesel variant in the WD-40 series, featuring an International Harvester 7.6L 4-cylinder diesel engine with 48.9 hp estimated engine power. It has a 3-speed gear transmission with dry disc clutch, two-wheel drive with spur gear final drives, and manual steering. The tractor weighs 7,550 lbs and rides on 34x6 front and 50x12 rear steel tires. It delivers a tested drawbar power of 37.21 hp and belt power of 48.79 hp, capable of pulling 4 14-inch plows. The belt pulley diameter is 16.75 inches with a speed of 2580 ft/min. The WD-40 was designed for farm use with an open operator station.