RING SEAL (CAT CT20802-51251)

A damaged ring seal can allow fluid or gas to escape past the sealing surface, reducing system pressure and causing gradual performance loss. During disassembly, a ring seal may appear intact but still fail to hold pressure due to compression set or surface wear. The ring seal’s primary mechanical function is to create a static barrier between two mating surfaces, preventing leakage under normal operating conditions. This aftermarket replacement part references the CAT catalog and carries the cross-reference number CT20802-51251. Keeping a ring seal in sound condition helps maintain consistent sealing force over the service interval. Verify the serial number or application, then call (562) 693-7748. A worn ring seal can also allow contamination ingress, leading to accelerated wear of adjacent components.

Part number variants: CT20802-51251, ct20802-51251, CT2080251251, ct2080251251