Back-up ring for Terex HC230

The back-up ring 0762 120 36 serves as a support component within the hydraulic and pneumatic systems of the Terex HC230 crane. It is installed alongside dynamic seals, such as O-rings, to prevent the primary seal from extruding into the clearance gap between moving parts when the system is under high pressure. By providing a rigid backing, this component maintains the seal geometry and ensures the integrity of the hydraulic circuit, which helps prevent fluid leakage and supports the consistent operation of actuators and cylinders.

This component is compatible with the Terex HC230 model. The specification P34-T2 is associated with this part. The actual manufacturer for this component is Terex.

In heavy machinery, back-up rings are used in high-pressure applications where the clearance gap between mating surfaces might otherwise allow a soft seal to deform or fail. They act as a mechanical barrier that allows the primary seal to function effectively without being forced out of its groove during pressure spikes or continuous high-load operation.