Back-up ring for Terex HC230

The back-up ring, part number 0752 352 11, serves as a support component within the hydraulic and pneumatic systems of the Terex HC230 crane. Its primary function is to prevent the extrusion of dynamic seals, such as O-rings, when the system is subjected to high operating pressures. By providing a rigid support surface, this component ensures that seals remain correctly positioned within their grooves, preventing material deformation and subsequent fluid leakage that can lead to system failure.

This component is specifically engineered for use in the Terex HC230. It is installed alongside primary sealing elements to maintain system integrity during operation, particularly during pressure spikes. Proper installation of this back-up ring is necessary to ensure the effectiveness of the sealing assembly in heavy machinery applications.

In hydraulic systems, back-up rings are used to bridge the gap between mating parts where a seal is present. By filling this clearance, the ring prevents the softer seal material from being forced into the gap by hydraulic pressure, which is a common cause of seal degradation in high-pressure environments.