Why does the four-column hydraulic machine fail?

What causes the failure of the four-column hydraulic press? If you have no pressure at a slow speed, check whether the solenoid valve is normal or the relief valve is damaged. If this is the case, repair or replace it in time. If the setting value of the system pressure reducing valve is too low, and the pilot valve of the pressure reducing valve will wear and make the valve work unstable and even the pressure cannot be regulated. The second may be that the integrated channel block is designed with an incorrect pressure reducing valve damaged, and the other pump, motor or cylinder may be damaged and leaking internally. Working under long-term variable loads will cause the spring to become soft, the spring length will be shortened or the entire broken, cracks, peeling or other damage, which may cause the valve to fail and make the system unable to work normally, because the sealing ring of the hydraulic press with three beams and four columns will also wear during long-term work, causing unstable pressure leakage. Improper operation during installation may also cause deformation of the parts, the piston rod and cylinder are stuck or the hydraulic cylinder is blocked, the control pressure of the hydraulic system is too low, air entering the hydraulic system, the valve core is stuck or the valve hole is blocked, the pressure oil is viscosity and poor fluidity, which leads to slow operation of the hydraulic cylinder, which affects the pressure instability of the hydraulic press.