The working device is the main part of the hydraulic excavator. At present, the SY series excavator is equipped with a backhoe working device. It is mainly used to excavate the soil below the downside, but it can also excavate the soil below the maximum cutting height, except for the excavation, ditch and loading. Excavation work is suitable for excavation of grade I ~ IV soil, and hydraulic hammer or blasting is needed for grade V above.
The backhoe work device consists of the main parts of the working device, such as the movable arm, the bucket rod, the bucket, the rocker, the connecting rod, and the hydraulic pipeline including the oil cylinder of the movable arm, the bucket rod oil cylinder and the bucket oil cylinder.