An implement hitch is disclosed for a tractor, wherein the hitch is fitted with a mechanism for stabilizing lateral movement of lifting arms of the hitch. The lifting arms are raised and lower by respective hydraulic cylinders. The stabilizing mechanism has a locking pin that is automatically retracted to an unlocked position by means of a flexible linkage when the lifting arms are in a lowered position. In the invention, the opposite end of the flexible linkage from the locking pin is connected to an anchoring point provided on the hydraulic cylinder serving to raise and lower one of the lifting arms.
