The wheeled excavator is an excavating machine that uses tires as its traveling parts, referred to as wheeled excavator.  The wheel digger travels quickly, does not damage the road surface, can move to other sites on its own over long distances, and can quickly replace a variety of operating devices.  The maximum traveling speed of foreign wheel diggers is mostly 25-40km/h, while that of domestic ones is mostly 20-35km/h.  Although the work efficiency of wheel digging is not as good as that of crawler digging at the same level, compared with the expensive transfer fees of crawler digging, wheel digging has more economic advantages when frequently changing sites.  Because of its distinctive characteristics of mobility, flexibility and efficiency, wheel diggers have been widely used in excavation and moving of materials in municipal maintenance projects, highway transportation construction and rapid repairs.