Back up seal for Link-Belt RTC-8040 II

The 3J13998 back up seal functions as an auxiliary component within the hydraulic systems of the Link-Belt RTC-8040 II crane. Its primary role is to provide mechanical support to the primary seal, such as an O-ring or lip seal, preventing it from deforming or extruding into the clearance gap when subjected to high fluid pressure. By maintaining the shape and position of the primary seal, this component helps preserve the integrity of the hydraulic system and prevents fluid leakage. It is typically installed within the gland of a hydraulic cylinder, positioned directly behind the primary sealing element to ensure stable operation during heavy lifting tasks.

This component is compatible with the Link-Belt RTC-8040 II rough-terrain crane. It is engineered to fit precisely within the designated groove alongside the primary seal, ensuring it does not interfere with the movement of the piston or rod. The design accounts for the specific hydraulic fluids and operational pressures encountered in crane actuator systems, including those used for boom and outrigger operations. Proper installation of this back up seal is necessary to maintain the pressure-holding capability of the cylinder assembly and to ensure the safe operation of the crane's hydraulic functions.