A vehicle hydraulic system which has a component lube circuit, a pump supplying hydraulic fluid from a sump to a first and a second hydraulic control circuit includes a filter circuit. The filter circuit includes a first filter circuit outlet connected to a inlet of the lube circuit, a sump line connected to the sump, and a second filter circuit outlet connected to an inlet of the pump. A suction filter or screen is connected between the sump line and the second filter circuit outlet. A suction bypass filter or screen is connected in series with a suction bypass valve between the sump line and the second filter circuit outlet. A return filter or screen is connected to an outlet of the first control circuit. A return line is connected between the return filter and the first filter circuit outlet. A return bypass filter or screen is connected in series with a return bypass valve between an outlet of the first control circuit and the return line. A pressure responsive backpressure valve has an outlet connected to the second filter circuit outlet, and has an inlet and a pressure sensing pilot line both connected to an outlet of the return filter. The backpressure valve also has a valve member biased by a spring to a normally closed position and movable to an open position in response to pressure in the pilot line. An orifice is located in the return line. A pressure sense line has one end connected to the return line between the orifice and the first filter circuit outlet, and has a second end connected to the valve member in opposition to the pilot line.