Power steering system for a working machine

A power steering system for a working machine, said power steering system comprising:

• at least one steering cylinder, comprising two compartments separated by a piston,
• a liquid tank,
• a steering unit comprising a steering valve and a metering device, for supplying one compartment of the steering cylinder with a metered flow of liquid,
• a hydraulic pump, for pumping liquid from the liquid tank to the steering unit through a supply line, a return line through which the liquid can flow from the steering unit back to the liquid tank,
• a recirculation line connecting the return line to the supply line, a check valve being arranged on said recirculation line to prevent liquid from flowing from the supply line to the return line,
• two control lines, respectively connecting the steering unit to the two compartments of the at least one steering cylinder,
• a liquid accumulator connected through a branch to the return line;
• and
• a relief valve arranged on the return line between the liquid tank and a connection point of the liquid accumulator, wherein the relief valve enables the liquid to flow from the steering unit to the liquid tank only when a pressure threshold has been reached.