Caterpillar's New D8N Tractor with Differential Steering

The D8N track type tractor at 213 kW (285 horsepower) was developed to provide a machine with large tractor features, yet carefully sized to be transported easily. In addition to incorporating the design features of Caterpillar's other large elevated sprocket tractors, the D8N has been equipped with a unique new steering system that represents the latest advancement in crawler tractors: powered differential steering. This paper discusses the design features of the tractor and its new steering system.