Komatsu 208-27-71220 Final Drive Bearing Assembly

The 208-27-71220 is a precision-engineered final drive planetary bearing designed for Komatsu large-frame hydraulic excavators. It serves as a critical rotating component within the travel motor reduction gearbox assembly, supporting planetary gear shafts under high radial and axial loads during track propulsion. Manufactured to OEM specifications, this bearing features case-hardened bearing steel construction with optimized internal geometry for contaminated lubrication environments typical in final drive compartments. The component is designed for press-fit installation into planetary carrier bores and onto gear shafts, maintaining running clearance under thermal expansion cycles. Application coverage spans multiple Komatsu excavator platforms including the PC270LL, PC300HD, PC350LL, PC400, PC450LC, PC460LC, PC500LC, PC490LC-10, and PC500-8 series. Cross-reference compatibility extends to select Komatsu feller buncher models including XT430, XT445, XT450, and XT460 series. Replacement part numbers include 2082771220 and superseded variants 208-27-71210, 208-27-71230, and 22U-26-21320.