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Big Bud Tractor. Big Bud Tractor. 16-V 747 Big Bud The World's Largest Farm Tractor. In 1977 the Big Bud 747 tractor was built in Havre, Montana. The tractor was built by Ron Harmon and the crew of the Northern Manufacturing Company. The tractor was built to produce 760 horsepower using a 16-cylinder Detroit Diesel engine. The tractor measures 27 feet long, 20 feet wide, and 14 feet tall.
Usually when we think of the world's biggest machines, our minds turn to mining equipment, like Caterpillar 777F rock trucks. 1. Big Bud 16V-747 Tractor. An impressive 28 ft long and 20 ft wide, Big Bud's enormity is no coincidence - this massive tractor shares some of the same DNA as super-sized mining equipment.