Back-up ring for Terex HC230

The back-up ring, identified by part number 0782 304 14, serves as a support component within the sealing systems of the Terex HC230 crawler crane. It is designed to provide mechanical backing to primary seals, such as O-rings, during operation. By preventing the primary seal from extruding or deforming into the clearance gap under high pressure, this component maintains the structural integrity of the seal assembly and helps prevent fluid leaks.

This component is specifically engineered for fitment in the Terex HC230. It is intended for use in hydraulic cylinders where high operating pressures are common. The ring acts to stabilize the primary sealing element, ensuring it remains properly positioned to perform its function within the hydraulic circuit.

In hydraulic systems, back-up rings are used alongside elastomeric seals to allow the system to operate at higher pressure levels than the primary seal could withstand on its own. By filling the extrusion gap, the back-up ring ensures that the primary seal maintains its shape and contact pressure against the sealing surfaces, which is necessary for the effective containment of hydraulic fluid.