Note the use of hydraulic jacks selection hydraulic jack at the lifting operation, to select the appropriate tonnage hydraulic jacks: not overload the carrying capacity, select the carrying capacity of hydraulic jacks must be greater than 1.2 times the weight of gravity; minimum height suitable hydraulic jacks, Jack, in order to facilitate removal, use hydraulic jacks minimum height clearance should weight at the bottom urging adapt during landing pad support heavy sleeper, the electric jack, hydraulic jack lifting height greater than the thickness of the sleeper sleepers Sum of distortions. Lift tube stuck, jack principle, can not be up and down: Unscrew the lower end of the main frame circle relax sit screw; right-handed spin out the base, remove the shaft or gear, kerosene clear threaded, hydraulic jack, check the guide health whether from the keyway, and keyways are filled with dust and other impurities; check gear, screw nut cracks, shortages; clear after completion of the original inspection order installed, tightened. Hydraulic Lu (Figure) _ _ jack jack principle provided by the Texas Lu of the hydraulic machinery plant. Texas Lu force hydraulic machinery plant (www.luliyeya.com) located in Dezhou City, Shandong Province, seven West Industrial Park. Scraps and development in the wave of market economy, the current Lu hydraulic force has a high profile in the hydraulic machinery and parts, and enjoy a good reputation. Hydraulic Lu made the whole network business alliance certification, marking our service and management level has reached a new height. Lu Hydraulic staff willing to work with all people of insight and common development, for a better future.