Built-in accumulator pressure hand pump mechanism to ensure the pressure steady hand pumps, fuel cap seal acts like a safety valve to prevent over-pressure tank; built-in dual pressure relief valve to prevent pressure overload. Relief check valve prevents the load within the free fall; dual piston design, two-speed feature reduces the pressure times; manual control valve is easy to control the security decreased slowly when unloaded; the high pressure hand pump for no power and compressed air The site glitch hydraulic hand pump operations to prevent hydraulic hand pump when used during installation or use some common faults professional manufacturer manual pump, if these common faults that you know in advance manual pump sales, then the installation is on again can prevent in advance, which the hydraulic hand pump installation, use is definitely a good thing, today small to put these common problems you summed up: According to the season to add or replace grades of oil to meet the requirements of the provisions of the oil at the surface, remove the foreign body inside the tubing, tighten the bolt or nut joints; hydraulic hand pump replacement of aging or damaged oil seal or "O" ring gasket; hydraulic hand pump to replace worn gear pump or pump bushings, wear light When the flat end mill will be smooth. Its roughness tolerance 0.03mm; the sleeve on the end face of the hydraulic hand pump below the plane (normal less than 2.5 ~ 2.6mm) manual pump prices, such as ultra-poor should be the next sleeve plus 0.1 ~ 0.2mm copper to compensation, the installation should be put into the sleeve at the rear axle; unloading pieces and sealing ring must be installed in the inlet chamber, two sleeves in order to maintain balance. Unloading film seal ring should have a preload amount of 0.5mm; the guide wire should be able to simultaneously stretch the upper, lower sleeve toward the rotational direction of the driven gear is twisted by a small angle, so that the main, two driven gear sleeve machining plane closely fit the manual pump applications | hand pumps | hydraulic speed quality offered by mass-velocity Dezhou City, hydraulic machinery factory. Dezhou City mass-velocity hydraulic machinery plant (www.dzzhisu.com) (www.dzzhisu.com) strong, credible, in Dezhou hydraulic equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improve the quality of innovative ideas will lead you hand speed hydraulic and into the brilliant, for a better future! You can also access (www.dzzhisu.com/supply_details_47681960.html), for more information about the company.