Back-up ring for Terex BT4792

The back-up ring, part number 226091, is a component used within the front outrigger cylinder of Terex BT4792 machinery. This ring is integrated into the hydraulic sealing system to provide structural support to the primary seals, such as O-rings or piston seals, during operation. By occupying the clearance gap between mating surfaces, it prevents the extrusion of softer sealing materials when the system is subjected to high hydraulic pressure. This support ensures that the seals maintain their intended shape and functionality, which is necessary for the proper operation of the outrigger cylinders during lifting and stabilization tasks.

This component is specifically engineered for fitment in the Terex BT4792 model. In hydraulic systems, back-up rings are positioned alongside seals to manage the pressure forces that would otherwise cause seal deformation or failure. By containing the seal material, the back-up ring helps maintain the integrity of the hydraulic circuit, reducing the risk of fluid bypass and assisting in the consistent performance of the cylinder assembly.