Kubota KX 018-4 series rubber tracks and undercarriage parts are now available online to order for your next scheduled maintenance. Excavator maintenance and replacing worn or damaged parts can increase the lifespan and performance of your undercarriage. We now supply the complete line of KX 018-4 series undercarriage parts including the drive sprocket, tension idler, bottom track rollers down the center of the undercarriage, and the rubber tracks.