Agricultural attachment i.e. plough, for tractor, has control actuator whose switch off is controlled by hydraulic control variable that is based on another control variable, which brings attachment into headland and/or transport position

摘要

The attachment has a coupling device for coupling the attachment with a working vehicle. A control actuator (1) e.g. hydraulic cylinder, is subjected with outside energy, and coupled with the coupling device. The coupling device exerts a force on the vehicle in a switched on condition of the actuator. Switch off of the actuator is controlled by a hydraulic control variable that is based on another control variable, which brings the attachment into a headland and/or transport position. A double-acting control valve (20) i.e. double-acting non-return valve, is arranged upstream of the actuator.