Lift the lifting cylinder, the oil is injected to a predetermined oil level gauge, the truck load of about 1/10 of the rated load, loosen the bleed bolt from the lift cylinders on the best multi-section hydraulic cylinder, operating the forklift helicopter cylinder lifting, down several times until the vent plugs at the absence of bubbles, multi-section hydraulic cylinder 300 tons, and then tighten the drain plug to bleed. Seal of quality and sliding or crawling are directly related. O-rings when used at low pressure, compared with the U-shaped ring, due to the high surface pressure, the larger the difference between static and dynamic friction, easy to slip or crawl; U-ring surface pressure with increasing pressure increases, although also a corresponding increase in the sealing effect, but also the difference between static and dynamic friction of the larger, multi-section hydraulic cylinder 200 tons, an increase of internal pressure, the impact of rubber elasticity, Jincheng multi-section hydraulic cylinder, the contact resistance increases lip large, tilting and lip seals will be extended, but also prone to slip or crawl, to prevent it tipping support ring can maintain its stability. Multi-section hydraulic cylinder 50 t, Jincheng multi-section hydraulic cylinder, hydraulic pressure is provided by the Texas Aerospace Dezhou City aerospace hydraulic machinery plant. Dezhou City aerospace hydraulic machinery plant (www.sdhtyeya.com) strong, credible, in Dezhou hydraulic equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Texas aerospace hydraulic into the brilliant and you work for a better future!