The present disclosure relates generally to a system for adjusting the rotational speed of a hydraulic powered feed roll in a harvester, and specifically to a system where a controller adjusts the rotational speed of the feed roll by adjusting the position of a control valve, which adjusts the rate hydraulic fluid flow through a motor to adjust the rotational speed of the feed roll. In some embodiments, the controller adjusts the position of the control valve so that the rotation of the feed roll matches that of the mechanical drive of an associated tractor.
