Caterpillar Incorporated 8P-4900 Retainer Ring

The Caterpillar 8P-4900 Retainer Ring is a genuine Cat component designed to provide secure axial retention in specified Caterpillar drive and hydraulic assemblies. Identified by part number 8P-4900, this retaining ring is listed for Cat equipment in the 10 and 11-series families as well as the D10 and D11N line, including models 10, 10C, 10S, 10U, 11, 11SU, 11U, D10, and D11N. Installed where Cat specifies a retaining ring solution, it helps prevent unwanted movement of gears, sleeves, or related rotating parts by seating within a groove or bore to maintain alignment under typical operating loads. The ring is available through Cat Parts Stores and authorized Caterpillar distributors as a genuine Caterpillar component, ensuring compatibility with the listed model families and adherence to Cat’s manufacturing tolerances. This concise identification—part number 8P-4900, compatible model set, and function as a retaining ring—helps technicians confirm correct usage during overhauls, field repairs, or preventative maintenance on affected Cat machines.