Back-up ring for Terex BT4792

The back-up ring 226852 serves as an auxiliary sealing component within the hydraulic lifting cylinder of the Terex BT4792 crane. It is installed in conjunction with dynamic seals, such as O-rings, to provide structural support. By filling the clearance gap between mating surfaces, this ring prevents the primary seal from extruding into the gap when the hydraulic system is subjected to high operating pressures.

This component is specifically engineered for the lifting cylinder assembly, which controls the boom angle during load positioning. Proper installation of this back-up ring ensures that the primary seal maintains its intended shape and position within the cylinder housing. By supporting the seal, it helps maintain the integrity of the hydraulic circuit and prevents fluid bypass within the lifting system of the BT4792 model.

Back-up rings are used in various hydraulic applications to stabilize seals against pressure differentials. They are typically positioned on the low-pressure side of the seal to counteract deformation. In heavy machinery, these rings are standard elements in cylinder maintenance to ensure that dynamic seals function within their design parameters throughout the stroke of the piston.