The present invention relates to a trailed agricultural machine (1) which comprises a support frame (3) provided with processing tools (4) and can be connected to the three-point hitch (5) of a tractor (2) by means of a coupling frame (6). The support frame (3) resting on the ground at least during transportation by means of wheels (15) and a load transfer system (20) extending between the carrying frame (3) and the coupling frame (6) to exert a force on the coupling frame (6) in at least one so-called intermediate configuration in which a majority of the processing tools (4) are not in contact with the floor and are arranged at the rear of the wheels (15). The agricultural machine (1) is characterized in that the agricultural machine comprises a device (30) adapted to isolate the hydraulic circuit of the load transfer system (20) in the so-called intermediate configuration.
