Caterpillar 9J-0711 Wear Ring

9J-0711 Wear Ring is a genuine Caterpillar piston-guide wear ring engineered for hydraulic cylinders in Cat equipment. This Cat part, manufactured as Cat Plast wear ring, provides a low-friction bearing interface that guides the piston and helps control wear between the piston and bore. The wear ring features a bore diameter of 177.8 mm, aligning with Cat's piston-guide specifications for compatible hydraulic cylinders. Identified by the part number 9J-0711 (also listed as 9J0711 by some catalogues), this wear ring is designed to be installed where Cat hydraulic cylinders require a dedicated piston guide wear ring. Typical applications include replacement in Cat hydraulic systems where a 177.8 mm bore wear ring is specified, serving to improve cylinder life and piston alignment. As a genuine Cat component, it is intended for use with Cat equipment where the 9J-0711 specification is called out by the service or parts manual.