The excavator cab has two handles that control the travel speed of the left and right tracks. As long as the two handles are pushed to different positions, the running speed of these two tracks will be different, so the excavator can turn.

If you want to turn to the left, let the right track move forward more than the left track; Or move forward on the right without moving on the left; Or move backwards on the left and remain stationary on the right; Or move back on the left and forward on the right.

Each excavator has a main hydraulic pump, which outputs pressure oil to drive the rotary hydraulic pump. The rotary hydraulic pump drives the gearbox, and finally drives rotation.