Spring centered balanced resolver valve

A hydraulic system comprising in combination a source of pressurized hydraulic fluid, a plurality of hydraulic motors, a plurality of control valves for directing fluid from said source to said motors, means for actuating said control valves to cause said control valves to transmit said fluid to selected ones of said motors, a dual-stage pressure responsive relief valve communicating with said source for said system for normally establishing a first pressure for said system and for establishing a second different pressure for said system in response to pressurization of a relief valve pilot line, communicating therewith further comprising:

• a balanced resolver valve having a first inlet connected to receive pressurized fluid upon actuation of a first of said control valves and having a second inlet connected to receive pressurized fluid upon actuation of a second of said control valves and having an outlet communicated with said relief valve pilot line, said resolver valve further having means for transmitting pressurized fluid from either of said inlets to said outlet when only one inlet is pressurized and having means for relieving pressure from said outlet when both of said inlets are pressurized and for preventing simultaneous communication of said inlets with said outlet.