Big Bud Tractor
16-V 747 BIG BUD
"THE WORLDS 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. The tires were specially made by United Tire Company of Canada and are 8 feet in diameter. When the 1,000 gallon fuel tank is full the tractor tips the scales at over 100,000 pounds.
It was originally designed for the Rossi Brothers, cotton farmers in Bakersfield, California. The Rossi Brothers used the tractor for deep ripping. They owned and operated the 16-V747 for 11 years.
After leaving the cotton farm of the Rossi Brothers the Big Bud found its way to Indlantic, Florida. The second owners, Willowbrook Farms, also used the tractor for deep ripping purposes. Willowbrook Farms retired the Big Bud and left it to rest.
In 1997 the Big Bud found its way back home to Montana, only 60 miles from where it was built. The Williams Brothers of Big Sandy, Montana purchased the tractor and brought it to their farm in Chouteau County. The Williams Brothers use the tractor for cultivation purposes, pulling an 80 foot cultivator. The tractor can work more than one acre per minute, at speeds up to 8 mph. Except its new paint job, chrome stacks, and a whopping 900 plus horsepower - the Big Bud looks like it did when it rolled out of the Northern Manufacturing Company building back in 1977.
Big Bud Specs
TWIN DISC 8FLW-1801
Type: 18in. (45.72 cm) circuit with lock-up clutch
Forward speeds: 6
Reverse speeds: 1
Type: Limited-slip differantial with planetary wheel ends
26 in x 8in (66.04 cm x 20.32 cm) airbrakes, all wheels
System type: Load-sensing system allowing maximum pump flow to steering and implement valve.
Maximum flow: 65 gal/min (245.96 liters/min)
Tank Capacity: 150 Gallons (567.64 liters)
Relief pressure: 2000 psi
Implement valve: 4-spool open center, 60 gal/min (227.05 liters/min)
Steering: Orbital motor with 100 cubic inch (1.64 liters) displacement per steering wheel revolution
Steering cylinders: Double action dual cylinders, 4.5 inch (11.43 cm) bore
Starter system: 24 volt
All other electrical: 12 volt
Alternator: 75 amp
95,000 lb (38,636 jg) estimated shipping weight
130,000 lb (49,895 kg) ballasted weight
Wheelbase: 16 feet, 3 inches (4.95 meters)
Height (top of cab): 14 feet (4.27 meters)
Length (frame): 27 feet (8.23 meters)
Length (end of drawbar): 28 feet, 6 inches (8.69 meters)
Width (over fenders): 13 feet, 4 inches (4.06 meters)
Width (over duals): 20 feet, 10 inches (6.35 meters)
The Big Bud has moved!
See the World's Largest Farm Tractor on display at:
Hwy 3 W / 119 9th St SW
Clarion, Iowa 50525
Wednesday 1:30 - 4:00PM
Saturday 1:30 - 4:00PM
OR by appointment.
Please call the museum a day in advance to schedule your tour.
Please take the time to sign our guest book and feel free to leave some feedback.