New or long opposed hydraulic jack, because there is more air cylinders memory, when started, the rod may appear tiny breakaway phenomenon can be hydraulic jack load reciprocating motion 2-3 times, to exclude cavity Air-term idle jack, do not work long-term because the seals caused by hardening of the seal, thus affecting the life of hydraulic jacks, hydraulic jack when not in use so large tonnage jack, hydraulic jack to load reciprocating month sports 2-3 times. Removing the jack before electric hydraulic jacks, it should loosen the relief valve regulator pistol, the hydraulic circuit pressure relief that is close to zero pressure. Then cut off the power supply manual hydraulic jack, hydraulic jack is stopped, parked in a good position to be removed. Let go of the two-chamber oil hydraulic jack, open head, be corrected before the demolition of thread, filling point kerosene, a period of time, tapping head, the threaded vibrating loose, you can remove it. Electric jack, Lu Hydraulic (certified), Shandong Lu jack provided by the Texas hydraulic equipment factory. 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.