Hydraulic coupling device and method of mounting the same

A hydraulic coupling device comprising a female coupling unit comprising a female coupling body, a holding block, a guiding ring, and an expanding ring for fixedly arranging the female coupling unit to the holding block 50 in an opening of the holding block, wherein the guiding ring comprises an outer surface comprising a thread surface portion configured to engage with a thread surface portion of a cylindrical portion of the opening of the holding block for fixedly arranging the guiding ring to the holding block, wherein a seat is provided in the opening for supporting the expanding ring, wherein an outer surface of a front end of the female coupling body comprises a circumferential groove comprising a groove seat, configured to receive the expanding ring, wherein the female coupling unit is adapted to be fixedly arranged to the holding block by being suspended between the guiding ring and the seat, wherein the expanding ring is arranged as a support between the female coupling unit and the seat.