Hydraulic device with a lubricating pump

Hydraulic Device, in particular hydraulic percussion device, with a lead for a pressurized hydraulic fluid, particularly hydraulic oil, and with a lubricating pump (1) connected to the supply line via a hydraulic inlet flow connection (E) is, and a pump element (10) for conveying lubricant such as Lubricating grease from a reservoir (12) to at least one to be supplied with lubricant lubricating point of the hydraulic Device and means for generating a pump stroke of the pump element (10), characterized in that as means for generating a pump stroke is provided a piston assembly (4), the means for reversing the direction of movement of at least one element of the Piston assembly (4) with at least one in particular by at least a groove-like recess (20) formed by-pass (20) and at least an elastic member (9; 9a, 9b) which the piston assembly (4) in a first, the hydraulic inlet (E) facing towards applied, are associated such that the piston assembly (4) between a fluid connection between the hydraulic inlet (E) and a hydraulic outlet (A) blocking the closing position and a ...