The Caterpillar Tractor Company first became involved in the manufacture of tractors in 1920, when the Russell Grader Company released its first self-propelled grader – the Motor Patrol. This grader combined the steel-frame of the Russell Grader Company's horse-drawn graders, with an Allis Chalmers crawler tractor.
In 1928, the Russell Company released their first grader featuring a Caterpillar 2-Ton Tractor. That same year, Caterpillar