Komatsu YM772147-37300 Track Roller Assembly

The YM772147-37300 track roller is a critical undercarriage component designed to support the machine weight and guide the track chain on Komatsu PC50FR-1, PC50-1, and PC50 mini excavators, as well as Yanmar B5, B50, and VIO series models. Manufactured to OEM standards with high-strength hardened steel and precision-sealed bearing groups, it ensures reliable lubrication retention and resistance to abrasive contaminants in harsh digging and travel conditions. This bottom roller assembly replaces Komatsu OEM part number YM772147-37300 and cross-references multiple Yanmar part numbers including 172460-37290 and 772423-37320. Direct interchange for aftermarket numbers 772147-37300 and 77214737300.