Usually excavate with bucket cylinder or both, and boom action if necessary. When the directional valve in the multi-channel valve group is in the right position, the bucket cylinder piston extends to push the bucket to dig. Or operate the directional valve at the same time to make the two cooperate for excavation. If necessary, operate the reversing valve to make it in the right or left position, then the incoming oil enters the boom cylinder to raise or lower the boom, so as to cooperate with the action of bucket cylinder and stick cylinder and improve the excavation efficiency.
1. Boom rise: operate the reversing valve to the right position and the boom rises.
2. Slewing: when the control directional valve is in the left or right position, the incoming oil enters the slewing motor drive motor with turntable steering unloading position.
3. Unloading: operate the reversing valve to control the stick cylinder and adjust the unloading radius. Then operate the change-over valve to the left to retract the bucket cylinder piston and unload the bucket. In order to adjust the unloading position, there should also be the cooperation of pen moving stiffness. At this time, the stick cylinder and bucket are combined, and the boom is also used.
4. Boom lowering: operate the reversing valve at the left position to make the boom cylinder complete the lifting action.
