Design and Implementation of Electro-Hydraulic Draft Regulating System For MF 285 Tractors Using A New Hitch Control Valve

In this research an electro- hydraulic system was designed, constructed and installed on the Massey Ferguson (MF) 285 tractor by using a new hitch control valve. The electro- hydraulic system consisted of a tensile load cell, a potentiometer, a PLC, stepper motor with driver, hitch control valve and a Programmable Terminal.
The experiment results showed that the performance of the electro-hydraulic control system was satisfactory in response to the draft force variations and the position of plow was altered proportional with the draft force. Also the control system was stable when the draft force was kept in the constant value. The field results showed significant difference between two control systems in fuel consumption and wheel slip (P