<p>Hay making machine comprises connecting rods (24, 25) assigned to pivoting beams (6, 7) which hinge at one end to a central man beam (8). The alignment of a boom (18, 19) automatically changes in relation to the pivoting beams during the pivoting movement of the pivoting beams. Preferred Features: The pivoting beams have a hinge (29) with a pivoting axis aligned across the longitudinal alignment of the pivoting beams.</p>
