Secondly, an electronic control for the hydraulic power supply group was introduced, able to control pump displacement without the use of a hydraulic load sensing line, hence avoiding dissipation along this line. Using the main control algorithm, the pressure load sensing value is sent to the E.C.U. as an electrical signal. The Metering E.C.U. implements a closed loop pressure control able to induce variations in pump displacement with the aim of keeping the supply pressure value equal to the detected pressure load plus a pump margin. An anti-cavitation control ensures that the pressure on the supply line is always higher than 0.05MPa. In this way it is possible to remove the compensator valve of the traditional pump and so to eliminate this source of energy dissipation. The valve control strategy is the same as that described in the previous step.