Two arms (5, 6) are secured inside the scoop lifting arms (1, 2) and extend backwards in essentially the lifting arm length direction. A middle bar (7) which can be extended using a hydraulic mechanism extends parallel to the lifting arms in a direction away from a middle fastener (3) extending between these arms. The outer end of the bar can be connected to the scoop (12). The lifting arms are manoeuvered using a hydraulic mechanism and are pivotally connected to the rear part of the tractor.