A hydraulic circuit mechanically linked to a panel and agricultural harvesters including the same. The hydraulic circuit can be used to facilitate the transition of hydraulic states from a quick speed to a slow speed, when opening and closing the panel. The hydraulic circuit includes a restrictive orifice and a fluid stop valve that, when opened, diverts the path of pressurized fluid away from a hydraulic actuator during the actuator's extension. The diversion of pressurized fluid away from the hydraulic cylinder or through the restrictive orifice substantially reduces the speed at which the panel opens or closes.