Making Tracks with Crawler Tractors

Tractor expert Bob Pripps traces the evolution of crawler tractor steering systems.

“Like sitting in a second-story window, driving a house” was the reaction of these visitors viewing a 1993 Caterpillar D11N. The group – members of the Antique Caterpillar Machinery Owners Club (ACMOC) – toured the Caterpillar plant in 1993. Current production versions of the D11N use an 850 hp engine and weigh 230,000 pounds.
Image courtesy Robert N. Pripps