Big Bud 747 is the world’s largest tractor, a custom-made farm tractor built in the late 1970s in Havre, Montana. The Big Bug 747 is not the only Big Bud tractor built at the manufacturing plant in Montana. The first two tractors were the 250 Series, purchased in 1968 for use on the 35,000 acres at Semenza Farm between Fort Benton and Chester, Montana.
Initially designed by Wilbur Hensler, built by employees at Northern Manufacturing Company, and made for the Rossi Brothers, Big Bud 747 came later in 1977. The Rossi Brothers were Californian cotton farmers who used the large tractor for over a decade before selling it to a farmer in Indialantic, Florida. Both farms used the biggest tractor globally for deep ripping, using the strong tines to loosen hard soil up to 50cm in depth. After falling into disuse, Big Bug 747 headed close to home and found work in Big Sandy, Montana, where it pulled an 80 ft. cultivator that worked 1.3 acres per minute.
By 2009, the decision was made to retire Big Bud 747 from traditional farm work and display the tractor at museums. As Big Bud 747 is a one-of-a-kind tractor, it has become increasingly difficult to find components to match its original design.
With 1100 hp, both owners and exhibitors advertise the Big Bug 747 as the world’s largest farm tractor. In size, it easily dwarfs the size of many of the largest tractors in production today. Depending on parameters, in some areas, the Big Bud 747 approximates twice the size of the biggest tractors on the market today.