<div class="htmlview paragraph">Advancements in farming techniques have required improvements be sought in the vehicle hydraulic system control.</div> <div class="htmlview paragraph">The application of a Electro-Hydraulic Servo System has produced these improvements for the J I Case Company on one series of its Agricultural tractors.</div> <div class="htmlview paragraph">This paper describes the control features, the interfacing of controls to the tractor and the requirement for system reliability.</div>