Orbitrol steering unit for Terex RT555-1

The steering unit, often referred to as an orbitrol, serves as the primary control interface within the hydraulic steering system of the Terex RT555-1 crane. It functions by converting the mechanical rotation of the steering wheel into a proportional hydraulic flow, which in turn actuates the steering cylinders to turn the wheels. This component is engineered to provide responsive and accurate handling, which is necessary for maneuvering the crane in tight work zones or during load positioning tasks. The internal valving is designed to maintain steering control even if the primary hydraulic pump experiences a loss of pressure.

This specific component, part number 718A0720, is intended for integration into the Terex RT555-1 model. It is designed to match the original hydraulic system requirements for this crane to ensure consistent steering performance and operator feedback. Proper installation and maintenance of this unit are necessary to prevent erratic steering behavior or loss of control during operation.

In heavy machinery, hydrostatic steering units act as the bridge between the operator and the vehicle's hydraulic circuit. By metering fluid based on the speed and direction of the steering wheel input, these units allow for the smooth articulation of steering axles. They often contain integrated relief and check valves to protect the steering circuit from pressure spikes and to ensure a steady flow of hydraulic fluid throughout the system.