Abstract: 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.

Abstract: A hydraulic filter assembly includes a housing mounted to a manifold which has a first inlet port, a second inlet port and an outlet port. The housing encloses a hollow outer filter element and a hollow inner filter element spaced apart from and received within the outer filter element. The housing and the outer filter element enclose an outer chamber therebetween, the outer filter element and the inner filter element enclose a middle chamber therebetween, and the inner filter element surround an inner chamber. The manifold has a first passage communicating the first inlet port to the inner chamber, a second passage communicating the second inlet port to the outer chamber, and a third passage communicating the middle chamber to the outlet port. As a result, fluid flows from the outer chamber to the middle chamber via the outer filter element and so that fluid flows from the inner chamber to the middle chamber via the inner filter element.