Back-up ring for Terex HC230

The back-up ring, part number 0782 355 11, serves as a mechanical support component for primary sealing elements within the hydraulic systems of the Terex HC230 crane. By providing a rigid backing, it prevents O-rings from extruding into the clearance gaps between mating surfaces when the system is subjected to high pressure. This component ensures that primary seals remain correctly positioned and intact, which is necessary for maintaining the integrity of the hydraulic circuits and preventing fluid leaks.

This specific back-up ring is designed for fitment on the Terex HC230 model. It is installed alongside the primary seal to limit movement and protect the seal from the mechanical stresses that occur during operation. Proper installation of this support ring is necessary for the consistent performance of the hydraulic system.

Back-up rings are used in various hydraulic and pneumatic applications where high pressure could otherwise force a seal out of its groove. By filling the extrusion gap, they ensure that the primary seal can perform its function effectively without the risk of being forced out of position.