Deere + Company

Donald E McGovern

Van E Waggoner

Stanley L Irwin

A quick drop valve is electrically actuated by a switch located adjacent to the implement positioning control lever. The quick drop valve is a pilot operated spring biassed valve. When the electric switch is closed a solenoid valve is energized redirecting fluid between the pilot control lines. The quick drop valve is shifted short circuiting the flow of fluid from the lift side of the hydraulic cylinder to the reservoir and redirects it to the drop side of the hydraulic cylinder for quickly dropping the working implement.

Electrical trigger for quick drop valve

A secondary hydraulic steering system being automatically triggered and manually actuated. The steering system is provided with a dual displacement fluid meter having a fluid pressure sensing valve for selecting the operational configuration in which the fluid meter is operated. The fluid pressure sensing valve is hydraulically coupled to the source of pressurized fluid and in response to a loss of fluid pressure shifts the dual displacement fluid meter into a reduced displacement configuration so that the operator has greater mechanical advantage.

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Dubuque, IA, United States of America

Donald E McGovern