An agricultural machine (2) comprises an operating unit (6) and a carrier assembly (8) for the operating unit. The carrier assembly includes a carrier arm (12) and a suspension system (16) by which the operating unit is suspended from the carrier arm. The suspension system including two pairs of connecting rods, comprising a pair of upper connecting rods (28) and a pair of lower connecting rods (30), each said connecting rod being attached via joints (32) to the operating unit and the carrier arm. A first pair of said upper and lower connecting rods diverge in a working direction (D) of the operating unit and a second pair of said upper and lower connecting rods converge in a working direction of the operating unit.
