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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.
They are Dong Feng tractors from China. They are distributed in the US and Canada under various names including Taskmaster, Avenger etc. The parent company is DFAM and it is the largest production base of small size tractors in China. The reviews are good, and has a good selection of tires. Distributors are growing in North America. You can get more information on the China tractors board.