Abstract: A three-function control lever is provided with a main ball joint operatively coupling the control lever to a console. An operator plate is coupled to the control lever for manipulating a first and second control link for manipulating an first and second hydraulic control valve. The first and second control links are coupled to the operator plate by first and second auxiliary ball joints. A radially extending arm projecting from the control lever controls the positioning of a third link for manipulating a third hydraulic control valve. The third link is coupled to the radially extending arm by a bell crank and auxiliary link. The auxiliary link is operatively coupled to the radially extending arm by a third auxiliary ball joint. A stabilizing link is operatively coupled to the operator plate and a fixed element to preventing the rotation of the operator plate when the control lever is twisted.

Abstract: A spool valve having a pressure inlet port, a work port and a tank port. A spool valve is responsible for selectively communicating the pressure inlet port to the work port and the work port to the tank port. The work port is located between the pressure inlet port and the tank port. The spool contains a passageway which receives fluid from the pressure inlet port and directs the fluid between the work port and the tank port to provide a pressurized fluid seal between the work port and the tank port.