What are the common failures of concrete pump trucks?

  The concrete pump truck is a kind of mechanical equipment which is used by many constructors at present. It can greatly improve the efficiency of construction. The application of concrete pump truck is often seen in civil construction engineering, high-rise building engineering, hydraulic engineering, large-scale foundation engineering, Bridge Engineering, Subway Engineering, hydropower engineering and so on. So what are the common failures of concrete pump trucks? This is a lot of construction side are very concerned about a problem.

  During the continuous operation of the concrete pump truck, there is often a commutating pressure shock, and the pumping system commutates frequently. The main oil circuit of the pumping hydraulic system is a closed circuit, which is usually in the state of large flow or high pressure. It is composed of two main hydraulic cylinders in series and a bidirectional variable axial piston pump, will inevitably lead to the concrete pump truck oil temperature is too high. High oil temperature is mainly due to the adjustment of components, maintenance, improper operation, or manufacturing and design problems. In particular, there may be the following reasons: 

1, hydraulic system internal leakage is too serious; 

2, overflow valve is not unloading or set the pressure is too high; 

3, poor cooling radiator, dust accumulation too much; 

4. The fan of the cooler stopped working; 

5. The cooler appeared to be blocked;

 6. The low-pressure relief valve set the pressure too high or appeared to be damaged; 

7. The hydraulic system of the boom did not unload; 

8. The hydraulic oil itself is insufficient, when the oil temperature rises too fast, or the hydraulic oil temperature is higher than 30 ° C-80 ° C this normal working temperature, should be in accordance with the experience to find the right in time