Hydraulic jack jacking or partial failure rate uneven One reason may be due to air intrusion inside the cylinder, so here, we need to set the exhaust valve, remove the air. There may be because the head of the piston rod seal the hole too tight or too loose, then we need to adjust the ring should be able to ensure a smooth hand-pull rod without leakage. Another reason may be the failure of hydraulic cylinder surface rust or scuffing the surface of the hydraulic cylinder failure needs to be honed jack, severe to replace the cylinder. That we face more than a failure, how to deal with: first look competing force hydraulic jack piston and cylinder radial clearance is not too large, if the General Assembly had caused serious internal leak, this time you need to replace worn piston; second look Pistons bar is not bent, so a direct result of the resistance is too large, the required correction of the piston rod, a serious replacement; Third look piston seal is not damaged, so that the piston does not seal, but also result in a speed falters thin jack, seals need to be replaced at this time, of course, we want to remind you, jack in the assembly should not be too tight; recent look at the hydraulic cylinder surface there is no drum type, if it will cause both ends of the oil spill, the emergence of this situation need to use boring mill hydraulic cylinder bore, the piston or monogamous. Use jack works always encounter problems such as hydraulic jacks, today on the first analysis of the reasons for the slow lifting jack the price, if there are other difficult problems, please call the Department of competing technology of hydraulic jacks. It can choose different size, type, quantity RSM series of ultra-thin, thin RCS series, large tonnage DYG series based on the actual situation of the scene 10T, 20T, 30T, 50T, 100T, 150T, 200T, 320T, 500T jack. And configuring 1.1KW, 2.2KW, 3KW, 4KW, 5.5KW, 7.5KW, 13KW different specifications pumping stations, equipped with high-pressure tubing of different lengths and proper dispensing valve, using a pump delayed more than the top of the method of construction to meet the adaptation job site requirements. Separate hollow jack, Lu Hydraulic (certified), provided by the Texas Jack Lu force hydraulic machinery plant. Texas Lu force hydraulic machinery plant (www.luliyeya.com) is a leader in Dezhou, hydraulic machinery and parts, over the years, the company is implementing 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 force a better future.