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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.
World's Largest Machines Ever Built , More specifically, it is a mobile strip mining machine It is the largest tracked vehicle in the world at 13,500 tons what is the biggest mining machine in the world - , strip mining machine - for scale see truck at 22sec! - YouTube-  ,11 Aug 2011 , strip mining machine - for scale see .