Back-up ring for Link-Belt LS-98

The back-up ring, part number 1A0599, serves as a support component within the hydraulic systems of the Link-Belt LS-98 crane. Its primary function is to provide structural backing to dynamic seals, such as O-rings or rod seals, preventing them from extruding into the clearance gaps when the system is subjected to high hydraulic pressures. By limiting the deformation of the primary seal, this component helps maintain the integrity of the hydraulic circuit and prevents fluid leakage.

This component is specifically configured for the Link-Belt LS-98 crawler crane. It is installed within hydraulic cylinders where reliable sealing is required to manage operational pressures. Proper fitment ensures that the seal remains correctly positioned within its groove, allowing for effective operation of the crane's boom and lifting mechanisms.

In hydraulic applications, back-up rings are used alongside primary seals to bridge the gap between mating surfaces. They prevent the primary seal from being forced into the extrusion gap caused by pressure differentials. These rings are typically installed on the low-pressure side of the seal to provide the necessary mechanical support, ensuring the primary seal functions correctly throughout the operating cycle of the hydraulic equipment.