Hydraulic apparatus having an additional thrust section

A distribution assembly of a hydraulic device with radial pistons, said device comprising a cylinder block which is engagable on a shaft by translation, said assembly comprising:

• a distributor, in contact with said cylinder block,
• a distribution cover, where the distributor is movable with respect to the distribution cover,
• a first chamber and a second chamber defined respectively by a first volume and a second volume located at the interface between said distributor and said distribution cover, and for receiving fluids under pressure allowing rotation of the cylinder block,
• wherein the distribution assembly comprises an additional section defined by a third volume located at the interface between said distributor and said distribution cover, said section for receiving said fluids under pressure to allow the engagement of the cylinder block on the shaft by a clutch which operates by moving the distributor against the cylinder block, and moving the distributor away from the cylinder block upon release of said fluids under pressure.