Back-up ring for Terex BT4792

The back-up ring 935-00122 serves as a support component within the hydraulic triple pump assembly of the Terex BT4792 crane. Its primary function is to provide a rigid mechanical backing for O-rings, preventing them from deforming or extruding out of their designated housing when subjected to high fluid pressures. By maintaining the seal's geometry, this component ensures the integrity of the hydraulic circuit and prevents fluid leakage.

This part is specifically utilized in the triple pump system, which is responsible for supplying the necessary flow and pressure to operate various crane functions, including boom elevation, slewing, and outrigger extension. Proper installation of back-up rings is necessary in these high-pressure pump configurations to maintain system efficiency and prevent pressure loss. Regular inspection of these rings is part of standard maintenance for the hydraulic pump assembly to ensure the continued operation of the machine's hydraulic systems.