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The 9000T track-type agricultural tractors mark John Deere's entry into the high-horsepower, track tractor market. The 360-HP 9300T and the 425-HP 9400T tractors were designed with input from customers to meet customers' needs. Through customer input, on-farm research, and common sense, these tractors have been designed to work light in the spring, heavy in the fall, handle steep hillsides, turn under load and pull like a locomotive. Incorporating many of the already-market-dominating features of the 9000 wheel tractors plus innovative track vehicle features such as the wide stance, long wheel base, controllability, power, and versatility, these machines are truly amazing.

On-board vehicle electronics has matured and become a practical replacement for mechanical type control systems. Electronic control systems typically allow more application flexibility and performance enhancement potential than the mechanical control systems they replace. This paper will cover the electronic three-point hitch control on the John Deere 55 Series row-crop and 60 Series 4WD tractors. It will explain how the use of electronics has provided a more flexible system with adaptation to different vehicle configurations. It will also show how electronics has provided improved serviceability and performance.