Terex
Back-up ring for Terex HC230
This back-up ring is designed for the sealing systems of the Terex HC230 crane. It provides mechanical support to primary seals to prevent extrusion in high-pressure environments.
Parts diagram
Compatible models
Specifications
- Part number
- 0751 770 07
- Brand
- Terex
The back-up ring, part number 0751 770 07, serves as a support component within the sealing assemblies of the Terex HC230 crane. Its primary role is to provide mechanical backing to primary seals, such as O-rings, which prevents the seal material from extruding into the clearance gap between mating surfaces under elevated operating pressures.
This component is specifically intended for use in the Terex HC230 model. By maintaining the structural shape and positioning of the primary seal, it ensures the integrity of the hydraulic or pneumatic circuits within the machine. Proper installation of this ring helps manage the pressure distribution across the sealing interface.
In heavy machinery, back-up rings are used to support seals in high-pressure applications where the clearance gap might otherwise allow the seal to deform. By filling the gap, the back-up ring ensures the primary seal remains effective, which is necessary for maintaining system pressure and preventing fluid leakage across various hydraulic assemblies.

