Back up washer kit for Link-Belt LS-98

The PX309 back up washer kit consists of auxiliary components used to support seals within the hydraulic systems of the Link-Belt LS-98 crane. These washers are positioned adjacent to primary seals, such as O-rings or piston seals, to prevent them from extruding into the clearance gap under high pressure. By providing this structural support, the washers help the seals maintain their position and integrity during the operation of the crane's hydraulic circuits.

This kit is specifically configured for the Link-Belt LS-98 lattice boom crane, which is frequently utilized in heavy lifting, construction, and industrial dredging applications. The components in this kit are designed to fit the specific seal housings found in this machine, ensuring compatibility with the existing hydraulic architecture. Proper installation of these washers is necessary to prevent seal failure, which can otherwise lead to hydraulic fluid leaks and a subsequent loss of system pressure.

In hydraulic systems, back up washers act as a mechanical barrier that fills the extrusion gap between mating parts. This prevents the softer seal material from being forced into the gap when the system is under load. Replacing these washers during seal maintenance helps ensure that the sealing assembly remains effective and prevents premature wear of the primary sealing elements.