Tractor & Construction Plant Wiki
International Unistar CO-7044A
International 1970 CO7044A Unistar.jpg
International 1970 Unistar CO-7044A 4WD COE tractor, shown with Jifflox trailing-axle converter at American Truck Historical Society show, Reno, Nevada, 2001
Manufacturer International Harvester Co.
Introduced date mid-1970
Discontinued date 1972
Capacity tons/GVW/GCW 36000 lb GVW, 130000 lb GCW
Make Cummins
Model NTC-300
Fuel diesel
Cooling water
Cylinders 6
Displacement ci / L 855 ci
Power HP @ rpm 300 @ 2100
Gearbox make (model) Fuller RTF-909A (Spicer optional)
Gears (forward speeds) 9 (10, 13 optional)
Axles & drive
Wheels/drive 4x4 (full-time 4WD)
Tires standard/optional 10.00-20 12-ply dual rear
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The Unistar, billed by International as the Universal Highway Tractor was based on the Transtar CO-4070A 4x2, but with a modified grille, bumper, and front corner design. It’s main feature was a driving front axle with overrunning clutch to give it excellent traction in all conditions. The engine was the Cummins NTC-300, a special “torque-balanced” variation of the NTC-335. The standard transmission was a Fuller 9-speed with up to 13-speeds optional. The Unistar could be combined with a Jifflox trailing-axle converter so that it could be switched quickly from 4x4 to 6x4 layout. The engine offerings for the Unistar were expanded in 1972, to a range of Cummins diesels from 255-370 hp and Detroit Diesels from 260-318 hp.

See also

References / sources

  • Crismon, Frederick W. (1995). International Trucks. Motorbooks International, Osceola, Wisconsin.
  • Mroz, Albert (1996). The Illustrated Encyclopedia of American Trucks and Commercial Vehicles. Krause Publications, Iola, Wisconsin.

External links