Komatsu 21W-30-00014 Front Idler Assembly

The 21W-30-00014 front idler assembly is a critical undercarriage component designed to guide the track chain and maintain proper track tension on Komatsu mini excavators. Manufactured from forged steel with an induction-hardened tread surface, it provides resistance to abrasive wear and impact loading in construction environments. This idler assembly serves as a direct replacement for OEM part numbers 21W-30-00010 through 21W-30-00015 and 21W-30-R0014. It is engineered to match original equipment dimensions and mounting specifications for the PC60, PC70, PC75, PC78, PC80, and PC88 series machines. The assembly includes the idler shell, shaft, and bearing group ready for installation.