Hydraulic circuit for gradually adjusting the displacement of a hydraulic apparatus

The circuit has a secondary line (13) connecting an accumulator (11) to a hydraulic unit (1). A primary distributor (15) selectively connects the hydraulic unit to the accumulator or reservoir (R). The secondary line comprises a secondary distributor (16) alternating between a first configuration and a second configuration. The secondary distributor is controlled via the pressure within a primary line (12) such that transition from the first configuration to the second configuration of the secondary distributor is carried out when the pressure in the primary line reaches a threshold value. An independent claim is also included for a method for gradually adjusting displacement of a hydraulic apparatus.