Back-up ring for Terex HC230

The back-up ring, part number 0758 719 20, serves as a support component within the hydraulic and pneumatic sealing assemblies of the Terex HC230 crane. It is installed alongside primary seals, such as O-rings, to prevent them from deforming or extruding into the clearance gaps between mating surfaces when subjected to high fluid pressure. By maintaining the position and structural integrity of the primary seal, this component helps ensure the system remains leak-free during operation.

This component is specifically compatible with the Terex HC230 model. It is engineered to fit into hydraulic cylinders, valves, and other pressurized circuits where seal containment is required to maintain system pressure and prevent fluid loss. Proper installation of this ring is necessary to avoid premature failure of the primary seal, which can lead to pressure drops and compromised machine performance.

Back-up rings are used in various heavy machinery applications to extend the operational range of elastomeric seals. By filling the extrusion gap, they allow the primary seal to function effectively under higher pressures than it could withstand on its own. This support is essential for maintaining consistent hydraulic performance across the various circuits of the machine.