Brake and steering system

A combined brake and steering hydraulic system for a vehicle, comprising a hydraulic pump on the vehicle having an output of a predetermined maximum amount of fluid in a normal operating range, a first priority valve having a first inlet and a first regulated outlet and a first by-pass outlet, the said first inlet connected to receive the entire output of the said pump, the said first regulated outlet during normal operation discharging an approximately constant flow of fluid, an open center hydraulic brake mechanism on the vehicle, first conduit means directing fluid from the said first regulated flow outlet to the said brake mechanism, a second priority valve having a second inlet and a second regulated outlet and a second by-pass outlet, second conduit means directing the flow from the said first by-pass outlet to the said second inlet, an open center hydraulic steering mechanism on the vehicle, the said second regulted outlet discharging fluid during some conditions of operation at a second approximately constant flow, means directing the flow from the said second regulated outlet to the said steering mechanism, the total of the said first and second constant flows being less than the said predetermined maximum amount, and the said second by-pass outlet discharging the remainder of the fluid output of the said pump.