Patent ID: 7726125

Claim:
A hydraulic circuit, comprising: a variable displacement pump configured to create a flow of pressurized fluid and having: a fluidic displacement control configured to vary the flow of pressurized fluid based on a first fluid signal; and an electronic displacement control configured to vary the flow of pressurized fluid based on an electronic signal, wherein the flow of pressurized fluid is controlled by the one of the fluidic displacement control and the electronic displacement control that is requesting the smallest flow of pressurized fluid; a first control valve connected between an outlet of the pump and an input of the fluidic displacement control, the first control valve being configured to transmit the first fluid signal to the input of the fluidic displacement control; and a controller operable in a shake out mode to: direct the first fluid signal in the form of pressurized fluid from the pump outlet to the input of the fluidic displacement control to cause the fluidic control to request a maximum flow of pressurized fluid; and transmit the electronic signal to the electronic displacement control to cause the electronic displacement control to vary the flow of pressurized fluid.