Hydraulic jacks to buy: 1. A method of determining the top of the lift to use than actually required (lift tension) increased 20% to 30% of the load amount of a plurality of jack-mounted hydraulic jacks were used, since there will be uneven load 160 tons of press cylinders, use a sufficient margin of top lift jack please use pipe handle first hydraulic valve bolts tightened, and then manually pump, action, Jack can raise 80 tons press cylinders old brand as to when to put down the press cylinders, hydraulic valve bolt set to decline slowly relax, can not fall under this jack automatically weightless state. Top load weight is twice the weight of the claw portion charge, if the height of the license, to make use of the top position. Press cylinder supply, Texas aerospace hydraulic cylinder presses supplied by Changzhou Dezhou City aerospace hydraulic machinery plant. Dezhou City aerospace hydraulic machinery plant (www.sdhtyeya.com) is an industry leader in Shandong Dezhou, hydraulic equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Texas aerospace hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the Texas aerospace hydraulic better future.