Back up ring for Terex BT4792

The back up ring, identified by part number 901-00152, is a component used in the swing gear box assembly of the Terex BT4792 crane. Its primary function is to support primary seals, such as O-rings, within hydraulic systems that operate under pressure. By filling the clearance gap between mating metal parts, the ring prevents the primary seal material from extruding or deforming during dynamic operation, which helps maintain the integrity of the seal and prevents fluid leaks within the swing system.

This component is specifically intended for use in the Terex BT4792 model. Proper installation of this ring ensures that the primary seals remain in their intended position and shape during the rotation maneuvers of the crane. Maintaining a leak-free swing gear box is necessary for the consistent operation of the machine's rotation system.

In general engineering applications, back up rings are used in conjunction with elastomeric seals in high-pressure environments. They protect the softer seal material from being forced into the gaps between mechanical components, thereby extending the service life of the sealing arrangement and ensuring the hydraulic system maintains its required pressure levels.