The Hydraulic Steering Control Units consists of a rotary and a rotary meter. Via a steering column the steering unit is connected to the steeringwhel of vehicle.When the stering whecl is turned, oil is direted from the steering system pump via the rotary valye and rotary mcter to thecylinder ports L ork (depend on the direction of turn).The rotary meter the oil flow to the steering cylinder in proportion to the angular rotation ofthe stecring whecl. The is used in stcering low speed and heayy d