Back-up ring for Terex HC230

This back-up ring, identified by part number 0762 120 21, functions as a support component within the sealing assemblies of the Terex HC230 crane. It is installed alongside O-rings to prevent seal extrusion when the system is subjected to high pressure. By providing a rigid surface, the ring ensures the O-ring retains its shape and continues to seal effectively against the housing walls.

The component is specifically engineered for fitment in the Terex HC230 model. It is designed to operate within the hydraulic and pneumatic circuits of the machine where fluid pressures are significant. Proper installation of this ring helps maintain the overall efficiency of the hydraulic system by preventing fluid bypass and protecting the primary seals from deformation.

In heavy machinery, back-up rings are used in high-pressure applications to bridge the gap between mating parts. By preventing the O-ring from being forced into the clearance gap, the back-up ring extends the service life of the seal and ensures consistent performance under varying load conditions.