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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.
Big, Bigger, BIGGEST! 3 MASSIVE MACHINES that move (and work!) (Worldâs biggest / largest ever built!). NASA CRAWLER-TRANSPORTERS: The NASA crawler-transporters are the largest land transport vehicles in the world. Each crawler weighs about 2.7 million kilograms or about 6 million pounds.