Back-up ring for Terex HC230

The back-up ring, identified by part number 0758 717 17, is a component used within the hydraulic and pneumatic systems of the Terex HC230 crane. It is installed in conjunction with O-rings to provide structural support, preventing the seal from extruding or deforming when subjected to high fluid pressures. By occupying the clearance space between sealing surfaces, the ring ensures the O-ring maintains its intended shape and position, which is critical for preventing fluid leaks in cylinders and valves.

This component is specifically compatible with the Terex HC230 crane. It serves as a protective element for primary sealing components, ensuring that the hydraulic system maintains pressure integrity during operation. Back-up rings are standard engineering components used in various heavy machinery systems to extend the service life of elastomeric seals by mitigating the effects of high-pressure fluid force. They are installed in the gland or groove alongside the primary seal to bridge the gap between mating parts, effectively stopping the seal material from being forced into the clearance gap.