When using pressure testing machine calibration, the jack plate installed at the geometric center of the test machine, start the test machine, the lower platen is raised about 50mm 1, in order to eliminate the impact of large-tonnage jack jack weight, then the tester reading pointer dial tone zero. 2 jack piston rises around 100mm, then the test machine platens moved closer jack piston manual jack, officially entered the calibration status. 3 check the direction of the piston of the jack should be consistent with the actual work of the steering wheel, according to the actual work, the available jack test machine (active check) or test machine pressure jack (passive check. Jack when using the fuel supply, into the oil should slow after repairs hydraulic jack into the assembly, in principle, all seals should be fully renewed flat jacks, new ones should be preceded by the identification of the reasons the original seal is broken, so as not to damage the seal again with the same reason, all the parts carefully cleaned before assembled into separate hydraulic jacks | Hydraulic Lu (certified) | Beijing jack provided by the Texas Lu Lu hydraulic equipment plant in Texas hydraulic equipment plant (www.luliyeya.com) is an industry leader in Shandong Dezhou, hydraulic machinery and components. Over the years, the implementation of scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Lu Hydraulic leadership with the staff warmly welcome all inquiries negotiations to create Lu Hydraulic better future.