FIELD: hydraulic control systems. SUBSTANCE: system is designed to control working members of mobile equipment. Control system has hydraulic motors, hydraulic control valve, control panel, and control unit. Control panel is connected to the first input of control unit, the first output of control unit is connected to control inputs of hydraulic control valves and their outputs are connected to hydraulic motors. In addition, system includes temperature-sensitive element of working fluid, variable-efficiency pump with electrohydraulic control and signal limiting device. Pump output is connected to inputs of hydraulic control valves. The second output of control unit is connected to the first input of signal limiting device and its second input is connected to output of temperature-sensitive element. Output of signal limiting device is connected to pump control input. System service life is extended due to improvement of pump operating conditions at low temperature of working fluid. EFFECT: higher reliability. 3 dwg
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