Making Tracks with Crawler Tractors

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

This nicely restored 1980 John Deere 450E uses a 60 hp 4-cylinder engine and a 4-speed transmission with a 2-speed power-shift auxiliary and a shuttle-shift reverse. Steering is by clutch-brake with hand levers.
Image courtesy Robert N. Pripps