Kubota RC461-21300 Idler Assembly

The Kubota RC461-21300 idler assembly serves as a front track idler for mini excavator undercarriage systems. It guides the track chain around the track frame ends and maintains proper track tension during operation. The assembly features a heat-treated steel casing for wear resistance and a sealed, oil-filled shaft design to exclude contaminants and retain lubrication under heavy-duty cycling conditions. This component is a direct replacement for OEM part numbers RC461-21300, RC411-21306, and RC411-21300. Cross-reference interchangeability includes RC417-21300, RC691-21300, and UX030Z0E. The unit weighs approximately 64 lbs (29 kg) and is engineered for Kubota KX91-3 series and U35 series mini excavators. Installation requires standard undercarriage tooling and torque specifications per Kubota service manual.