Backup ring for Terex HC230

The backup ring, part number 0762 136 25, serves as a support component for dynamic seals within the hydraulic systems of the Terex HC230 crane. Its primary function is to prevent the extrusion of the main sealing element, such as an O-ring, into the clearance gap between mating surfaces when the system is subjected to high pressure. By providing this physical support, the ring ensures the primary seal maintains its shape and sealing capability, preventing premature deformation or failure that could lead to hydraulic fluid leaks and pressure loss.

This component is compatible with the Terex HC230 model. In hydraulic applications, backup rings are installed on the low-pressure side of a seal to counteract the forces that would otherwise push the softer sealing material into the gap between moving or stationary parts. This configuration is standard in heavy machinery hydraulic circuits to ensure consistent performance and to protect the integrity of the sealing assembly under varying pressure conditions.