Abstract: An agricultural machine comprises a first frame part and a second frame part pivotably arranged about a vertical shaft relative to the first frame part. At least one first supply line which extends along the first frame part and at least one second supply line which extends along the second frame part, wherein a connecting device connects the at least first supply line and the at least second supply line together. To prevent distortion of the supply lines when pivoting the frame parts relative to one another, the connecting device comprises a retainer on which at least one rigid pipe connection is arranged for connecting the first and second supply lines wherein the pipe connection comprises two connecting ends aligned axially relative to one another, between which a bearing disc is clamped, wherein the bearing disc is rotatably mounted on the retainer.

Abstract: A reversible plough with a frame for a 3-point hitch attachment comprises a frame with lower first and second and an upper third attachment point for attachment to a 3-point hitch. A vertical pivot axle supports a plough tool carrier for pivotable movement. The upper third attachment point is located on a vertical pivot plate in a first upper pivot point. A second lower pivot point of said plate is connected to a transversel pivot axis on the frame and a third upper pivot point of said plate is connected to a control link. When the upper link of the 3-point hitch moves backwards, then the plate pivots and moves the control link backwards as well. Said control link extends towards the rear end portion of the frame and is connected to a link arrangement pivotally supported by the vertical pivot axle and connected to the plough tool carrier.

Abstract: An agricultural machine comprises a first frame part and a second frame part pivotably arranged about a vertical shaft relative to the first frame part. At least one first supply line which extends along the first frame part and at least one second supply line which extends along the second frame part, wherein a connecting device is arranged, by means of which the at least first supply line and the at least second supply line are connected together. To prevent distortion of the supply lines when pivoting the frame parts relative to one another, the connecting device comprises a retainer on which at least one rigid pipe connection is arranged for connecting the first and second supply lines wherein the pipe connection comprises two connecting ends aligned axially relative to one another, between which a bearing disc is clamped, wherein the bearing disc is rotatably mounted on the retainer.

Abstract: A reversible plough with a frame for a 3-point hitch attachment comprises a frame with lower first and second and an upper third attachment point for attachment to a 3-point hitch. A vertical pivot axle supports a plough tool carrier for pivotable movement. The upper third attachment point is located on a vertical pivot plate in a first upper pivot point. A second lower pivot point of said plate is connected to a transversel pivot axis on the frame and a third upper pivot point of said plate is connected to a control link. When the upper link of the 3-point hitch moves backwards, then the plate pivots and moves the control link backwards as well. Said control link extends towards the rear end portion of the frame and is connected to a link arrangement pivotally supported by the vertical pivot axle and connected to the plough tool carrier.