Back-up ring for Terex HC230

The back-up ring, identified by part number 0762 131 30, serves as an auxiliary sealing component within the hydraulic systems of the Terex HC230 crawler crane. Its primary function is to provide structural support to O-rings and other primary seals. Under high hydraulic pressures, primary seals can deform or extrude into the clearance gap between mating surfaces, which often leads to premature failure and fluid leakage. By installing this ring adjacent to the primary seal, the component prevents extrusion and maintains the seal in its correct position, allowing the assembly to withstand higher operating pressures effectively.

This component is designed for use in the hydraulic cylinders and valves of the Terex HC230. It is a critical element for maintaining the sealing efficiency of hydraulic circuits during operation. Back-up rings are used in hydraulic systems to bridge the gap between moving parts, ensuring that soft sealing elements remain contained and functional even when subjected to significant hydraulic force. By supporting the primary seal, the back-up ring helps preserve the overall performance of the hydraulic circuit.