Achieved by the injection molding machine hydraulic system to the pump control valve controlled hydraulic pump repair shift, so the conventional throttle speed control system into a proportional speed control system, control performance machine with new improvements and enhancements. Specifically, the proportion of variable displacement pump system in addition to the advantages of the conventional proportional control system, but also has the following advantages: the same power of the machine, the injection speed can be increased by more than 25%, more adapted to the requirements of thin-walled precision injection. Since ordinary PQ system power calculations to dwell state standards, the proportion of variable pump system at the time of this operation is very low power consumption, and thus pump displacement can increase more than 25%; reduce system heat, extend the service life of hydraulic components. Almost no throttling proportional variable system, overflow losses, the system is running fever greatly reduced. Not only save cooling water consumption, low oil sealing element life is greatly improved; reduce energy consumption, improve system efficiency; variable oil pump expensive and sensitive, in the first manipulation and routine maintenance should note the following: Pump within oiling: Before 啔 oil pump, fuel injection pump sales from fuel inlet into the pump until it filled up. If you start the pump before oiling, it may be due to insufficient lubrication failure. Pump can not be reversed: Note electrical wiring, reverse may damage the pump. Low-speed low-pressure test run: Repeat start and shut down the motor, the pump and the suction is released in the air. Ten percent of the input pressure and flow, open radio station forward and backward movement of the hydraulic pump maintenance for flow and pressure valve exhaust. Running ten minutes later, as the hydraulic system no abnormal sound, you can boot. If you stop using the machine again after a period of use, also need such a boot. Hydraulic oil used: hydraulic oil hydraulic oil viscosity selection 20-200Cstnian recommended 30-50cST high viscosity hydraulic oil. When the oil temperature is below 5 degrees, to deal with the hydraulic oil for heating. Cleanliness of hydraulic oil should be kept in NAS10 below should be cleaned every three months back to the oil filter cartridge, to keep the oil flow and clean. Maintaining the oil level in the oil ruler bit more: when the oil level is too low, the hydraulic oil is contained in the air release is not sufficient, so that a greater noise and damage the pump. Hydraulic pump repair _ _ hydraulic pressure from Jinan Jing Jing Chong Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) strong, credible, in Jinan, Shandong mining machinery industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead crystal create hydraulic and you hand into the brilliant, for a better future!