Cnh Industrial America LLC

Guy Thomas Stoever

Jerry Lee Brinkley

Gerard Restaino, Iii

A cooler bypass valve assembly for an agricultural implement includes a cooler bypass valve configured to receive hydraulic fluid from a hydraulic supply. The cooler bypass valve position is adjustable between a first position that facilitates flow of the hydraulic fluid to a cooler bypass and restricts flow of the hydraulic fluid to a hydraulic fluid cooler, and a second position that blocks flow of the hydraulic fluid to the cooler bypass and facilitates flow of the hydraulic fluid to the hydraulic fluid cooler. The hydraulic fluid cooler is capable of reducing a temperature of the hydraulic fluid, and the cooler bypass directs the hydraulic fluid around the hydraulic fluid cooler. Additionally, the cooler bypass valve assembly includes a control assembly that controls the cooler bypass valve position based on the temperature of the hydraulic fluid.

Fluid cooler bypass system for an agricultural work vehicle

The apparatus uses an electrical signal controlled valve, for instance, a proportional solenoid controlled valve, controlled by a controller, to control a pilot operated valve for regulating pressure of fluid in a port thereof in connection with a fluid operated system. A pressure sensor in connection with the port is used to monitor the regulated pressure. The regulated pressurized fluid in the port is also used, as required, as a component of the pilot signal. The valves are configured such that when the electrical control signal is absent or the electrically controlled valve is unresponsive thereto, the presence of pressurized fluid at a predetermined supply pressure, will automatically operate the pilot operated valve in cooperation with a biasing element thereof, for delivering pressurized fluid at a minimum or reduced regulated pressure.

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Minooka, IL, United States of America

Guy Thomas Stoever