1、Tensile hydraulic pressThe cause of the control valve pressure disorder
In the process of operation, it is found that the pressure cannot come down or go up, which may be the failure of the reversing valve, resulting in continuous high pressure in the hydraulic system.
2. Abnormal pressure caused by oil pump and oil motor
If the oil pump and oil motor are used for too long, there will be serious internal wear, large leakage, and low volumetric efficiency, resulting in insufficient output flow of the oil pump. The engine speed is low and the power is insufficient, resulting in insufficient flow of the hydraulic system and low hydraulic system.
3, other reasons lead to insufficient pressure
For example, the oil position of the oil tank is too low, the oil suction pipe is fine, and the oil suction filter is blocked by impurities and dirt. These will cause the oil suction resistance of the stretching hydraulic machine oil pump to be too large, resulting in insufficient flow of the hydraulic system and low pressure.