... Komatsu Undercarriage Parts. 2, Idler, carrier roller, track roller, sprocket, track shoe, track link, track adjustor Our company is excavator parts manufacturer, we produce almost all of the parts for ... , KOBELCO. Take the undercarriage parts for example, we have the idler, sprocket, track roller/ bottom roller, carrier roller/ top roller, track shoe, track link, track adjuster, recoil spring, yoke ...