Back up ring for Terex BT4792

The back up ring, part number 901-00155, serves as an auxiliary sealing component within the rotation gearbox assembly of the Terex BT4792 crane. It is designed to function in conjunction with O-rings or other primary seals to prevent them from extruding or deforming when subjected to high hydraulic or mechanical pressures. By providing a rigid support surface for the primary seal, this component helps maintain the integrity of the lubrication or hydraulic systems housed within the rotation gearbox. This support is necessary for the consistent operation of the crane's swing mechanism, which allows for the precise positioning of loads during lifting tasks.

This component is specifically compatible with the Terex BT4792 model. Back up rings are generally utilized in heavy machinery to protect primary elastomeric seals from being forced into the clearance gaps between mating parts under load. By filling these gaps, the back up ring ensures that the primary seal maintains its shape and continues to function effectively within the assembly.