Hydraulic Pump severe wear after we find the problem (1) Check the boom cylinder leakage case based on the following three points. The easiest way is to raise the boom to see if there is a significant decline in freedom. If the fuel tank drop significantly disassemble check how much of a mini-excavators, as worn seals should be replaced. (2) Check the control valve. First cleaning valve manufacturers offer small excavators, check the valve for wear, such as wear and tear should be replaced. After you install the safety valve if there is still no change, and then check the control valve spool wear, the gap is generally limits the use of 0.06mm mini excavator factory outlets, badly worn should be replaced. (3) Hydraulic Pump pressure measurement. If the pressure is low, then make adjustments, plus the pressure is still not tune up, then pump heavy wear. In general, the main reason causing the boom can not raise load to:. A hydraulic excavator heavy wear. At low speed pump leak serious; high-speed operation, the pump pressure is slightly increased, but due to wear and internal leakage of the pump, volumetric efficiency significantly decreased, it is difficult to reach the rated pressure. Pump wear and tear aggravated by long working hours, temperature rise, the resulting wear of hydraulic components and seals of aging, damaged, loss of sealing ability, hydraulic oil deterioration, leading to failure. b. Selection of hydraulic components unreasonable. The boom cylinder specifications for the 70/40 non-standard series, seals also non-standard parts, high manufacturing cost and inconvenience of replacing the seal. Boom cylinder bore small, is bound to make the system set pressure is high. c. Hydraulic system design is unreasonable. Control valves and hydraulic steering gear as a single pump series, the safety valve set pressure points 16MPa, while the rated working pressure of hydraulic excavators for 16MPa. Pumps often work at full load or prolonged overload (high pressure) situation, and the system has hydraulic shock, long-term oil changes, hydraulic oil contamination, increased pump wear and tear, so that the pump casing burst (after have been found Such failure). Excavator maintenance taboo: Oil not only increase in the use of diesel oil change is essential, mainly from the lubrication, cooling, cleaning and so on. Therefore mini excavators, many drivers will pay attention to check the oil in the oil, according to the standard Add, but it ignores the check the oil quality and oil change has changed, causing some of the engine's moving parts are always in the more poor lubrication environment operation, thus speeding up the various mechanical wear and tear. Under normal circumstances, the loss of oil is not large, but very easily contaminated, thus losing a role in protecting the diesel engine. In the diesel engine operation process, many contaminants (fuel incomplete combustion soot, coke and fouling, etc.) will enter into the engine oil. For new or mechanically overhauled, after the commissioning of impurities will be more, if the increase is not only eager to change in use, can easily lead to bush-burning, axle and other accidents. In addition, even if the replacement of oil, some drivers due to the lack of maintenance experience or the easy way, will not be thoroughly cleaned when changing the oil passages, mechanical impurities still remains in the sump and the oil circuit.泰安嘉 and Heavy Machinery Co., mini excavator manufacturers offer, Kerry and Heavy Industries (certified), Tongling mini-excavators by 泰安嘉 and Heavy Machinery Co., Ltd .. Taian Jia and Heavy Machinery Co., Ltd. (www.tajhzg.com/) is Tai'an, mining machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Heavy leader in Kerry and the staff warmly welcome all inquiries negotiations to create Kerry and heavy industry a better future.