After the cylinder and valve plate repair, the following methods can be used to check for leaks with the surface, that the disk with Vaseline oil flow to drain path blocked, painted a good oil valve plate flat on the platform or flat glass, then placed on the cylinder valve plate, cylinder diesel injection hole interval of oiling, oiling that a hole, a hole no oiling, observed more than 4h, the plunger bore diesel leak and collusion, indicating cylinder and Assignment disk polishing qualified. Generally institute in plant equipment design, determining the use and performance of the pump and pump selection. This choice must first select the pump from the type and form of the beginning, the type of pump is very large, depending on the operating conditions have vastly different selection, then what principle to choose a pump it? What is the basis? Considering the economy should be the lowest total cost of equipment costs, operating costs, maintenance costs and management fees. Centrifugal pump with high speed, small size, light weight, high efficiency, large flow, simple structure, no pulse infusion, steady performance, easy operation and maintenance and convenient. Therefore, except in circumstances where, as far as possible the choice of centrifugal pumps: a metering requirements, use metering pumps, peristaltic pump roller hydraulic repair prices, hose pump, head demanding, very little traffic and no suitable low flow high head centrifugal Rollers can be used when the hydraulic repair phone, the choice of reciprocating pumps, piston roller hydraulic repair, can also be used as vortex pumps, vane pumps hydraulic system failure diagnostic methods when cavitation do not ask a lot, but the most common is the feeling diagnostic method. Feeling diagnostic method is by using simple equipment maintenance personnel diagnostic instruments and personal experience with the hydraulic system fault diagnosis, determine the location and cause of failure. Roller roller hydraulic repair hydraulic repair _ _ Weinan 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!