Importance

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Abstract

A hydraulic cooler pressure isolation circuit for a header of an agricultural harvester equipped with a reservoir and a pump. The circuit comprises a hydraulic fluid cooler, a supply line extending from the hydraulic fluid cooler to the pump, a return line extending from the hydraulic fluid cooler to the reservoir, and a drain line operatively in fluid communication with the return line for connecting to the reservoir. A first valve, a second valve, a return valve, and a bypass valve of the circuit operate to direct hydraulic fluid flow through the cooler under normal system operating conditions, and direct hydraulic fluid flow to bypass the cooler when the system experiences high pressure operating conditions at the cooler.

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First Claim