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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.
1964 International Harvester Hough Division builds their first articulated wheel loader â the HD 400 of 10 cubic yard capacity; 1968 Caterpillar Tractor builds Cat 992 with 10 cubic yard capacity. 1970 International Harvester Company launches 580 Payloader of 18 cubic yard capacity â worldâs largest wheel loader to that date.