... 1. Komatsu Undercarriage Parts. 2, Idler, carrier roller, track roller, sprocket, track shoe, track link, track adjustor Our company is excavator parts manufacturer, ... HITACHI, KOBELCO. Take the undercarriage parts for example, we have the idler, sprocket, track roller/ bottom roller, carrier roller/ top roller, track shoe, track ... -8PC300-6PC300LC-7PC300-7PC400-6PC400LC-7PC400-7 Undercarriage Parts