Allis Chalmers WD

The Allis Chalmers WD is a row-crop tractor produced from 1948 to 1953 by Allis Chalmers in West Allis, Wisconsin, USA. It featured Two-Clutch Power Control and power-shifted rear wheels. The dual clutch system used a foot-operated dry clutch to disconnect the PTO and driveline from the engine, while a hand-operated wet clutch allowed the PTO to operate while the tractor was slowed or stopped. It was powered by a 3.3L 4-cylinder liquid-cooled vertical I-head engine available in tractor fuel and gasoline versions. The tractor had a 4-speed non-synchronized gear transmission with 4 forward and 1 reverse gears. It had a drawbar power of 19 hp claimed and 30.23 hp tested, with a PTO power of 26 hp claimed. The WD had two-wheel drive, manual worm and horizontal sector steering, and manual external compression band type brakes. It had an open operator station and a single hitch point rear tractor hitch. The tractor's dimensions include a wheelbase of 88.1 inches, length of 127 inches, height of 81.5 inches, and operating weight of 3500 lbs. It used 5.50-16 front tires and 11-28 or 12-28 rear tires. The electrical system had a positive ground, Delco generator charging system, and a 6-volt battery.