Patent ID: 7377353

Claim:
A traction control valve system for use with a hydrostatic circuit comprising: four fluid displacement motors with left front and right front motors and left rear and right rear motors fluidly connected within the hydrostatic circuit; first and second one-way relief valves adapted to connect to the hydrostatic circuit; wherein below a threshold pressure the first relief valve is closed so that the traction control valve system passes fluid from the left front motor to the right rear motor; wherein below the threshold pressure the second relief valve is closed so that the traction control valve system passes fluid from the right front motor to the left rear motor; wherein above the threshold pressure the first relief valve is open so that the traction control valve system passes fluid from the right rear motor to the left rear motor; and wherein above the threshold pressure the second relief valve is open so that the traction control valve system passes fluid from the left rear motor to the right rear motor.