This paper is dedicated to investigate the static and dynamic behavior of a hydraulic motor controlled by a hydraulic circuit incorporating a poppet-type directional control valve (DCV) and a pressure reducer. The system is fed by the hydraulic power from a constant pressure source. The pressure reducer is active in one direction of motor rotation. In the other direction, it is by-passed. The studied system and its basic elements were described mathematically and simulated by developing Matlab-Simulink programs, mainly the DCV, pressure reducer, the check valve and the hydraulic motor. The transient response of the system was investigated experimentally and the experimental results were used to validate the
simulation program.