Making Tracks with Crawler Tractors

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

This rubber-track Challenger uses hydrostatically biased differential steering controlled by the steering wheel, so driving is done in much the same way as a wheel tractor. This 1991 Caterpillar Challenger 65B has a 285 hp diesel, a full power-shift 10-speed transmission and weighs about 35,000 pounds. It has a transport speed of 18 mph. Caterpillar sold the Challenger brand to AGCO in 2002.
Image courtesy Robert N. Pripps