9 series crawler excavator R210LC9 R235LCR9 R250LC9. 9 series wheeled excavator R140W9 R170W9 Hyundai. MOTTROL USA EXCAVATOR PARTS DEPOT. YOUR BEST SOURCE FOR OEM QUALITY EXCAVATOR PARTS. For the parts described with both part number and application machine model or engine model, please make sure to order according to the part number, the application machine model or engine model is just for reference.