Bucket sequence of rear eight-wheel dump truck

Simply put, the engagement of the power take-off makes the gear pump rotate to provide hydraulic oil output; The manual valve controls the gas path to move the pneumatic reversing valve from the middle stop position to the lifting position, and the hydraulic oil is input into the lower cavity of the oil cylinder to realize lifting and start unloading. After reaching the limit height, the goods are unloaded cleanly, which triggers the air passage of the limit valve to open, so that the reversing valve returns to the middle stop position. When the manual valve moves to the descending station, the hydraulic oil in the lower cavity of the oil cylinder returns to the oil tank to lower the oil cylinder. There are two forms: rapid descent and slow descent.