Pump arm common problems and solutions

Why can't the boom open or move in some positions of the pump truck? In this column, a few reasons for the above situation and the troubleshooting method that the pump boom can not be opened or moved.

The reasons why the boom can not be opened or moved in some positions of the pump truck:

A. The pressure of the hydraulic system of the pump car is not enough

B. There are other excess loads on the boom of the pump truck

C. The solenoid valve is blocked or burned out

Pump boom can not be opened or can not move troubleshooting method:

A. If the maximum pressure indicating value of the valve does not reach the value when the boom is working, it should be checked whether the maximum pressure valve is not adjusted well, if the maximum pressure valve has been adjusted well but still cannot eliminate the fault, it indicates that the hydraulic pump is damaged and the hydraulic pump should be replaced

B. Make the excess load no longer act on the boom

C. If the boom still cannot work normally after checking according to the above, it is necessary to check whether the command valve of the single control boom is working normally.