howo concrete pump truck (ZZ5307N4647W)

The hydraulic system has an open loop. Every subsystem is equipped with overflow valve for fear of overloading.
The driving elements of the hydraulic system are all imported from Germany with original packaging. The pumping oil tank of concrete pump (Pumping production of concrete), i.e. Duty-cycle operation frequency of piston is controlled by changing speed of engine or adjusting discharge capacity of main oil pipe.