Terex
Back-up ring for Terex HC230
This back-up ring is designed for the Terex HC230 crane. It provides mechanical support to primary seals to prevent extrusion under high pressure.
Parts diagram
Compatible models
Specifications
- Part number
- 0762 122 59
- Brand
- Terex
The back-up ring, part number 0762 122 59, serves as an auxiliary component within the sealing systems of the Terex HC230 crane. It functions alongside primary seals, such as O-rings, to maintain the integrity of hydraulic circuits and other pressurized assemblies. By providing mechanical support, it prevents the primary seal from deforming or extruding into the clearance gap between mating surfaces when subjected to high fluid pressure.
This component is compatible with the Terex HC230 model. It is typically installed on the low-pressure side of a seal assembly to protect the primary seal from damage and ensure consistent performance within cylinders and valves. Proper installation of this ring is necessary to maintain the pressure-holding capability of the hydraulic system.
In heavy machinery, back-up rings are used to stabilize seals in high-pressure environments. By filling the extrusion gap, they allow the primary seal to function within its intended design parameters, helping to prevent fluid leakage and maintaining system pressure during operation.

