<p>Device comprising a rotary motor transmitting a linear movement to a hydraulic valve (6) through an arm (4) linked to the engine and acting on a clevis (5) integral with said valve (6). A spring acting on one end of the valve (6) provides clearance adjustment of the connection between the engine and said valve (6) and enables the return of the latter into a predetermined safety position in the event of breakdown of the system. The valve of the invention is for use in motor vehicle applications.</p>
