Steering control unit for Pettibone machinery

The steering control unit, part number BL-6781, functions as a hydrostatic steering valve within the hydraulic circuit of Pettibone machinery. Its primary role is to translate the rotational input from the operator steering wheel into a metered, proportional flow of hydraulic fluid. This fluid is directed to the steering cylinders, which actuate the wheels or axles to change the machine direction. By managing this flow, the unit allows for steering responsiveness without the need for a direct mechanical linkage between the steering wheel and the ground-engaging components.

This component is designed for use in various Pettibone material handling and construction equipment. The unit integrates a rotary spool valve and a gerotor or geroler gear meter to regulate pressure and flow within the steering system. It also incorporates internal relief and check valves to protect the hydraulic circuit during operation. Proper functioning of this unit is necessary to maintain accurate steering geometry and operator control during equipment travel and load positioning tasks. Maintenance of the hydraulic fluid and filtration system is recommended to ensure the internal components of the steering unit remain free of contaminants.