Brake Oil Cooler

The fluid released from the valve is passed back to the inlet side of the pump instead of discharging into the reservoir. This save energy that would be used if the fluid had to be drawn through the fine mesh filter screen. Line pressure is too great for the converter, so the secondary regulator acts as a pressure reducer. A portion of the fluid returning from the converter passes to an Brake oil cooler that provides low pressure lubrication of the gear box.