Backup ring for Terex BT4792

The backup ring is a component used within the extension cylinder assembly of the Terex BT4792 crane. Its primary function is to support O-rings and other primary seals within the hydraulic system, preventing them from extruding or deforming when subjected to high operating pressures. By providing a rigid support surface, the component helps maintain the integrity of the sealing system, which is necessary for the consistent extension and retraction of the crane boom.

This specific component is compatible with the Terex BT4792 model and features dimensions of 4.25 inches by 4.50 inches. Backup rings are used in hydraulic cylinders to prevent seal failure by filling the clearance gap between mating parts, ensuring that the primary seals remain in their intended position under pressure. This prevents fluid bypass and maintains the required hydraulic force within the cylinder assembly.