What is a single-acting hydraulic cylinder piston rod is only one end of the call into the single-acting hydraulic cylinders, engineering mechanical rod basically single out, rod mill on the machine, such as flat-out classes are single, cylindrical grinding The cylinder is double out. Very simple, look at the cylinder port 200 cylinders, there is an effect on a single, two double-acting is meant: hydraulic pressure piston or plunger only a single direction of motion, reverse the direction of movement must be realized by external forces, external : spring force or weight. The reason appears dirty hydraulic hydraulic oil mixed with water, rust or both of a hydraulic oil appears dirty or rusty simultaneously mixed with water ① Check the water system is at the same time there is oil, and if there is fuel tanks, indicating push bodies V-ring may be damaged . Time to replace the V-ring. ② Check the fuel tank filler neck is not covered, and other contaminants into the water. If it is then filtered to remove water and hydraulic oil and fuel tank filler cover. ③ Check the hydraulic system components ministries, whether because they are caused by oil pollution damage. Second, the master cylinder piston rod vibration due to work ① check whether the oil level is too low, the pump suction air caused by hydraulic cylinder piston crawl. At this point the need to refuel the specified oil level. ② Check the main pump inlet system for leaks. ③ Check whether the push bodies V-ring compression tight three, high oil temperature ① Check the main relief valve is faulty and often overflow. ② Check the auxiliary electro-hydraulic valves, unloading valves are especially fault. Because they will dispense valve pump cylinder unloading time by 25mn with fault often in high-load operation. Then the need to exclude its two valve failure. ③ replaced as hydraulic oil, need to check the oil viscosity is too low, so that the internal pump leakage consumption too. Fourth, the two movements are not synchronized push piston hydraulic cylinder piston push two movements are not synchronized in the suction stroke of the piston speed, the first to reach the end of the trip, and sometimes hit the cylinder phenomenon occurs, you can hear the piston and the cylinder head crash, this is generally due to the closure of memory in the air and cause the oil. Flat cylinder, Altay tank, hydraulic force provided by the Texas Lu Lu force hydraulic machinery plant. Texas Lu force hydraulic machinery plant (www.luliyeya.com) strong, credible, in Dezhou hydraulic machinery and components industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Lu Hydraulic and you hand into the brilliant, for a better future!