A. The hydraulic oil in the fuel tank is insufficient. If the oil pump sucks in the air or the oil filter is blocked by dirt, the oil pump will be short of oil, causing air bubbles in the oil to leak and hit the blade to generate noise. The solution is to check the oil quantity, prevent the air from being sucked in and clean. filter.
B. The viscosity of the hydraulic oil is high, increasing the flow resistance, and it is necessary to replace the suitable hydraulic oil.
C. Due to the damage of the bearing or blade of the oil pump or motor, the concentricity deviation of the coupling causes noise, and the concentricity replacement parts must be adjusted.
D. The directional valve is not responding but the function is still there. For example, the valve core wears, the internal leakage, the burr is blocked, the movement is inflexible, and the solenoid valve fails due to the current failure. The solution is to clean the valve core or replace it with new ones. The current must be stable and sufficient.
E. Damage to the hydraulic components or blockage of the oil pipelines, causing noise when the hydraulic oil flows at high speed.
F. The mechanical part is faulty, the parts are not lubricated, and the parts are loose. The reason should be found to tighten or replace them.
