When the oil is a steady stream of pressure to the hydraulic cylinder, which is a process of external work, hand pump is a manual mechanical energy is converted to a small pump hydraulic energy. In supporting the use of hydraulic jacks and special tools case, you can make all kinds of work, such as lifting, bending, straightening, cutting, riveting, assembly, disassembly and some construction, military construction. To ensure the maintenance of uniform oil pump gear, running almost steady roller hydraulic repair how, at the same time must engage the teeth more than a pair of design. At the same time as there are two pairs of teeth meshing hydraulic roller how much maintenance, the two meshing teeth are trapped in the gap with some oil. With the rotation of the gear, the gap decreases roller hydraulic repair, besieged by the crowd as well as the oil gradually produce a lot of pressure. This trapped oil with a high pressure reaction in gear to produce large radial force, a phenomenon known as the phenomenon of trapped oil. Where roller hydraulic repair, hydraulic repair roller Shangluo, Xi'an, Xi'an Chengtong hydraulic repair Chengtong hydraulic repair Limited. Xi'an Chengtong Hydraulic Maintenance Co. (www.huosu360.com) strong, credible, in Xi'an, industrial maintenance, installation and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Xi'an-hydraulic service and you work through into the brilliant, for a better future!