Add an exhaust device if there is no exhaust device, the hydraulic system can be activated to move the working parts quickly at the maximum stroke to force the air to be removed.Ģ. The nuts on both ends of the double piston rod are tightened too tightly, making them poorly concentric.ġ. Corrosion and roughening in the cylinder.Ĩ. The linearity of the inner hole of the hydraulic cylinder is poor (drum taper, etc.).ħ. The installation position of the hydraulic cylinder is offset.Ħ. Full length or partial bending of the piston rod.ĥ. The piston rod is not concentric with the piston.Ĥ. The sealing ring of the hydraulic cylinder end cover is too tight or too loose.ģ. Failure analysis and elimination method of directional valveĢ. Clean the parts, add an exhaust valve in the system, and keep the oil clean.ĥ. Adjust the throttle valve or increase the oil temperature radiator after the hydraulic system is stable.Ħ. Check the function of the system pressure and pressure relief device and the control of the relief valve is normal.ĥ. Check the precision and fit clearance of parts, repair or replace out-of-tolerance parts, and the connection should be tightly closed.Ĥ. Disassemble and clean related parts, replace with new oil, and keep the oil clean.ģ. The damping device is blocked, there is air in the system, and the pressure changes and jumps.ġ. As the oil temperature increases, the viscosity of the oil decreases and the speed gradually increases.Ħ. In the simple throttle valve, the speed changes suddenly due to the change of the system load.ĥ. Internal and external leakage of the throttle valve.Ĥ. The performance of the throttle valve is poor, and the adjustment position changes due to vibration during low-speed movement.ģ. The impurities in the oil adhere to the side of the throttle, the cross section of the oil is reduced, which slows down the speed.Ģ.
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