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[Asia Pump Network News] When the car pump is not pumping oil should be promptly repaired to prevent the failure to expand. Analyze the pump, diagnose the parts, causes and degree of the pump problem, analyze the pump and solve the problem. Xiaobian now inventory under the car pump common problems and solutions. Car pump car pump common causes of failure 1) plunger and plunger sleeve wear. In use, mechanical impurities in the fuel into the fuel injection pump cavity, the formation of abrasive wear, coupled with the fuel corrosion, the plunger and the sleeve gap increases, the pressure stroke caused by fuel from the plunger sleeve gap Leakage, insufficient oil supply or no oil supply. 2) out of valve wear. Mechanical impurities in the fuel, resulting in high-speed flow erosion under the oil valve, vacuum belt or seat wear and sealing lax, so that the residual pressure of high-pressure fuel pipe insufficient. When the pump again pump oil, some of the fuel pressure to add high-pressure tubing insufficient, and therefore to the cylinder for the lack of fuel, serious not oil. 3) Out of valve spring failure. Outlet valve spring out valve and valve seat close fit. Sealed and reliable, anti-high-pressure fuel pipe backflow. If the valve spring out of fatigue and elasticity to reduce the one-way out of the valve closure of the role of deteriorating, the phenomenon of oil backflow, the results and the reasons described in 2) the same. 4) low pressure oil pressure. Fuel pump low-pressure oil has a certain hydraulic pressure, to ensure rapid fuel into the pump chamber to ensure that the fuel pump oil pump. If the pump oil pump capacity is reduced or not pumping oil, or diesel filters, blocked oil, or fuel into the air system, etc., will make the fuel pump low pressure oil pressure decreases, or even can not generate pressure , When the fuel pump work, the fuel can not quickly enter the fuel pump cavity, resulting in fuel injection is not pumping oil or insufficient pump oil. 5) The oil lever or governor is stuck in the reduced amount of fuel supply, or in the non-oil position, resulting in reduced effective plunger stroke or zero, so that the fuel pump insufficient or not Oil supply. 6) Engine acceleration adjustment mechanism due to stagnation or improper adjustment, the role of pressure in the governor spring to reduce the fuel pump fuel supply by the governor to limit, that is, insufficient fuel. 7) plunger spring failure. If the plunger spring is tired or broken due to being compressed for a long period of time, it is impossible to ensure that the plunger is properly returned in good time and that the wheel body and the cam are in good contact with each other. The plunger stroke becomes smaller, resulting in insufficient oil supply or not. 8) Cam or roller body worn or improperly adjusted will reduce plunger lift and cause insufficient oil supply. Damaged camshaft bearings cause radial deviation (downward) of camshaft, causing the pump oil pressure to drop, resulting in Reduced fuel supply. 9) Column æ´ Vice stuck more due to the plunger and the sleeve with the gap is too small, or diesel viscosity is too large; wheel body improper adjustment (adjusted too high), plunger lift, the top will hit the oil outlet and Coarser, stuck in the plunger sleeve without oil. 10) Diesel improper choice. Such as the winter election when the higher pour point of diesel, because of poor diesel mobility, fuel can not flow quickly into the pump chamber, resulting in reduced fuel supply. If the diesel does not flow, it will result in fuel supply interruption; if the selection of summer diesel with low pour point, because of its low viscosity, easy to leak, will result in insufficient oil supply. Further Reading: pump valve pipe fittings Exhibition 2016 Exhibition of Information Industry, Internet (Xiamen) Technology Co., Ltd. Author: Asian pumps Network Editor: Yao Xiaoxia (QQ / micro letter:) http://beng.liuti.cn/ (Hotline :)
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