Working equipment with capabilities of preventing buckling of hydraulic cylinder

A working equipment comprising:

• a base arranged to be mounted to a vehicle;
• a movable arm connected to the base;
• a hydraulic system comprising an elongated double-acting hydraulic cylinder having a longitudinal axis A and provided with a cylinder cavity, and a piston arranged to move forth and back within the cylinder cavity along said longitudinal axis, and a piston rod attached to the piston, the piston dividing the cylinder cavity into a first chamber and a second chamber, the second chamber being on the rod side of the piston, wherein the piston rod is attached to and arranged to control movements of the arm relative to the base in response to the supply and return of hydraulic fluid to/from the hydraulic cylinder via hydraulic lines;
• a load holding valve unit arranged on the hydraulic line for the supply and return of hydraulic fluid to and from the second chamber of the hydraulic cylinder;
• at least one pressure measurement member configured to measure a pressure of the hydraulic fluid of the hydraulic system, and
• a working equipment control system arranged to generate driving instructions to be applied to the hydraulic system based on a set of operating instructions defining wanted movements of the movable arm, measured pressure values and stored control parameters,
• wherein said at least one pressure measurement member is arranged to measure the pressure of the hydraulic fluid in the second chamber of the hydraulic cylinder during an outward movement procedure of the piston rod, and to generate pressure values in dependence thereto, wherein the working equipment control system is configured to receive the measured pressure values obtained in the second chamber during an outward movement procedure, and to evaluate said measured pressure values by applying at least one evaluation criterion related to risk of hydraulic cylinder buckling of said hydraulic cylinder, and wherein said working equipment control system is further configured to perform at least one predetermined activity to reduce the risk of hydraulic cylinder buckling in dependence of the result of said evaluation.