... with over load protection H series motor grader PY120H,PY160H,PY180H,PY200H,PY220H company's patent: driven by static hydraulic ... in order to reach high scraping precision. Import pumps,motor graders and Liuzhou ZF gearbox,ensure operate reliable. Q ... static hydraulic,leading technology,superior performance. Import pump and motor simple to operate for featuring energy conservation and high reliability ...