Pump oil pump does not change how to do?

When the car pump does not pump oil, it should be repaired in time to prevent the expansion of the fault. It is through to inspect the vehicle, initially set to the location of the fault and the pump analysis, parts of the pump problem diagnosis, reason and degree, the automobile oil pump were analyzed to solve the problem.
Oil pump
1) plunger and plunger wear. In the use process and mechanical impurities in the fuel injection pump cavity of people, the formation of abrasive wear, and the corrosive effects of fuel, plunger and sleeve gap increases, oil pressure trip caused by fuel leakage from the plunger sleeve clearance, the oil shortage or oil.
2) out of the oil valve wear. Mechanical impurities in the fuel, resulting in the high speed flow of the valve, pressure relief valve seat wear and seal is not strict, so that the residual pressure in the high-pressure oil pipe. When the fuel injection pump oil again, there is a part of the fuel to add the pressure of the high-pressure oil pipe shortage, and thus to the cylinder for the fuel shortage, serious when the fuel supply.
Failure of the oil valve spring 3. Out of the oil valve spring valve and the valve seat tight fit. Reliable sealing, anti high pressure fuel pipe fuel back. If the oil valve spring fatigue and elastic decreases, the one-way flow of oil valve to reduce the role of the one-way flow back to oil, the results and reasons for the same as the 2.
Oil pump
4) low pressure oil circuit. Fuel injection pump low pressure oil pressure, to ensure that the fuel into the pump chamber quickly, to ensure that the fuel injection pump oil needs oil. If you lose the ability to pump oil pump to reduce or not to pump oil, or diesel oil filter, oil passage is blocked, or fuel system into air, will make the oil pressure of the low-pressure oil injection pump decreases, can't even generate pressure, when the fuel injection pump, fuel can be quickly into the fuel injection pump cavity, resulting in fuel injection pump oil pump or shortage of oil.
5) oil quantity adjustment rod or governor is stuck in the oil supply to reduce the amount of the position, or in the oil supply position, resulting in the effective stroke of the injection plunger to reduce or zero, so that the fuel injection pump is not enough or not.
6) engine speed regulating mechanism Inka lag or improperly adjusted, reduce the pressure on the speeder spring, oil supply quantity of the fuel injection pump is governor, that the fuel supply is insufficient.
Plunger spring failure 7. If the plunger spring due to long-term compression and fatigue or fracture, it can not guarantee the timely return of the plunger and the roller body and the good contact with the cam. Make the plunger stroke smaller, resulting in inadequate supply of oil or not.
Oil pump
8) of cam and roller body wear or improper adjustment, so that the plunger lift decreases, cause oil shortage; camshaft bearing damage, the cam shaft radial offset (down), resulting in low pump pressure, resulting in reduced oil supply.
9) column by Vice card die tragically plunger and sleeve with the gap is too small, or oil viscosity is too large; roller adjustment improper high adjustment plunger lift. At the top of the will and oil base to contradict and thicken, the card is dead in the plunger sleeve and oil.
10) improper selection of diesel. Such as selection in winter high solidifying point of diesel, because of poor mobility of diesel fuel, fuel can be flows rapidly into the pump cavity, resulting in reduced oil supply. If the diesel oil does not flow, resulting in oil supply disruption; such as the summer choose low solidifying point of diesel, because of its viscosity is small, easy to leak, resulting in insufficient supply.

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