Back-up ring for Link-Belt HSP8040

The back-up ring, part number 3A 13287, acts as a support component within the sealing assemblies of heavy machinery. It is positioned to prevent the extrusion of primary seals, such as O-rings, into the clearance gaps between mating surfaces when the system is subjected to high hydraulic or pneumatic pressures.

This component is specifically compatible with the Link-Belt HSP8040 rough-terrain crane. It is engineered to fit within the seal groove to provide the necessary structural support without interfering with the function of the primary seal. Proper installation of this component is necessary to maintain the integrity of hydraulic cylinders and other pressurized systems on the machine.

In hydraulic systems, back-up rings are used to bridge the gap between moving parts where high pressure could otherwise force a softer sealing element out of its housing. By providing a rigid surface, the ring ensures that the primary seal remains in its intended position, which helps to maintain system pressure and prevent fluid leakage during operation.