Abstract: A suspension system for a vehicle includes a first hydraulic circuit, a second hydraulic circuit and a connection between the first hydraulic and the second hydraulic circuit. The first hydraulic circuit is operatively coupled to a first side of the vehicle, and is selectively controllable to move the first side of the vehicle. The second hydraulic circuit is operatively coupled to a second side of the vehicle, and is selectively controllable to move the second side of the vehicle. The first hydraulic circuit and the second hydraulic circuit operate together in a first mode when the connection between the first hydraulic circuit and the second hydraulic circuit is opened to move the first and second sides of the vehicle in a same direction. The first hydraulic circuit and the second hydraulic circuit operate independently of each other in a second mode when the connection is closed.

Abstract: A computerized monitoring system is provided for sensing, displaying and storing a plurality of vehicle parameters for determining efficiency and to provide a detailed history of the vehicle throughout a work shift. The system is primarily intended for use on vehicles that carry heavy payloads many times a day such as are used in mining and general off-road, heavy-duty construction. The system incorporates up to 40 sensors to monitor vehicle parameters such as payload weight fluid temperatures, fluid pressures, fluid levels, shift position, direction of vehicle motion and vehicle speed. The system is provided with a display for showing the information to a vehicle operator. In addition, a central processing unit monitors the sensors and continuously compares the sensor output against predetermined maximum and minimum levels which indicate a "normal" range of operation. The system is initialized by a computer card that must be inserted into a card reader.