Back-up ring for Terex HC230

The back-up ring, part number 0759 001 09, functions as an auxiliary component within the hydraulic and pneumatic circuits of the Terex HC230 crane. It is installed in conjunction with primary seals, such as O-rings or piston seals, to maintain system integrity during operation. By providing a rigid support surface, this component prevents the primary seal from deforming or extruding into the clearance gaps between metal parts when the system is subjected to high pressure.

This component is compatible with the Terex HC230 model. It is designed to be placed on the low-pressure side of a seal to ensure that the primary sealing element retains its shape and functional characteristics. Proper installation is required to maintain the pressure-holding capability of the hydraulic assembly and to prevent fluid leakage.

In hydraulic systems, back-up rings are used to bridge the gap between mating surfaces, effectively protecting the softer primary seal from the mechanical stresses caused by pressure spikes. By limiting the movement of the seal material, the back-up ring helps preserve the sealing geometry and prevents premature failure of the hydraulic components.