Distribution device for a hydraulic machine and a hydraulic machine fitted with such a device

A distribution device for a hydraulic machine comprising a distributor having a central axis extending therethrough and presenting distribution ducts opening out into a radial distribution face, and a distributor-counterpart, wherein each of the distributor and distributor-counterpart is an element and wherein one element is engaged in the other of said elements, in such a manner that said elements present respective opposite axially-extending faces between which first and second main enclosures are provided, the device comprising first and second cylinder-capacity selection slides arranged one after the other in a bore of one of the elements constituted by the distributor and by the distributor-counterpart, which bore is connected to the main enclosures and to at least some of the distribution ducts, said slides being configured to adopt at least three distinct configurations establishing different connections between main ducts and the distribution ducts via the main enclosures, thus defining at least three distinct operating capacities associated with the at least three distinct configurations.