Reasons hydraulic hydraulic oil appears dirty or rusty simultaneously mixed with a water, hydraulic oil appears dirty or rusty ① simultaneously mixed with water at the same time to check whether the oil water system, if there is, the push mechanism described V-ring may be damaged. Time to replace the V-ring. ② check the fuel tank filler neck is not covered into the water and other contaminants. 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 damage caused by oil pollution. Second, the master cylinder piston rod vibration ① check whether the low manual hydraulic cylinders, pumps intake air caused due to work the oil level of hydraulic cylinder piston crawl. At this point you need to refuel to the specified oil level. ② Check the main pump inlet system for leaks. ③ Check whether the push mechanism V-ring compression tight three high oil temperature ① Check the main relief valve is defective and often overflow. ② Check the auxiliary electro-hydraulic valves, unloading valves are in particular trouble. Because they will dispense valve pump unloading time is shortened, often in a high load operation has failed. Then the need to exclude two valve failure. ③ replaced as hydraulic oil, you need to check the oil viscosity is too low hydraulic engineering, oil pump consume too much internal leakage. Fourth, the two push piston action does not synchronize the two push hydraulic cylinder piston movement is not synchronized, in the suction stroke of the piston speed, the first to reach the stroke end, and sometimes collided cylinder phenomenon, you can hear the piston and the cylinder head crash, this is generally due to the close passage of air and causing memory. (1) try to make the cylinder rod to withstand the maximum load in the tensile state, or having a good stability under pressure state (2) to consider issues cylinder stroke exhaust brake problems at the end of the hydraulic cylinder . If there is no buffer cylinder and exhaust system fuel tank, the system need to have the appropriate measures, but not all cylinders must consider these issues. (3) Installation for fixed correctly determine the hydraulic cylinder. As the piston rod is not subjected to bending with a threaded connection, use only the mouth connection. Hydraulic cylinders can not be positioned at both ends with the key or pin. Positioned at one end only, in order not to hinder it expands when heated. The impact load compression piston rod. Positioning member shall be provided in the piston rod end, such as the stretch is set at the head end. Manual hydraulic cylinders, Hydraulic Lu (certified), Nanjing Lu cylinder by hydraulic equipment plant in Texas. Texas Lu force hydraulic machinery plant (www.luliyeya.com) is an industry leader in Shandong Dezhou, hydraulic machinery and parts, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Lu Hydraulic leadership with the staff warmly welcome all inquiries negotiations to create Lu Hydraulic better future.