Machine oil pressure sensor is usually installed in the main oil duct，If the oil pressure sensor of the oil gauge is normal，and the oil pressure indicator of the oil is too low，It can be composed of the lubrication system，Analysis of the possible cause of the failure of the oil road。

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Before the oil pressure sensor:The main reasons are poor oil circuits (such as the filter is blocked) or insufficient fuel supply (such as insufficient oil volume), resulting in insufficient oil pressure。

After the oil pressure sensor:The main reason is that the oil road is leaked too fast (such as the crankshaft gap)。

(1) Oil pressure gauge fails or drives to the pressure gauge oil circuit block。Remove the nuts or bolts of the oil pipe and the oil pressure gauge (the other end to the main seabet iofuel duct)，Observe the pressure from the oil from the oil，It means that the pressure gauge is faulty，or the oil pipe to the oil pressure meter blocked。

(2) Insufficient oil capacity、Machine oil deterioration or water in the oil。Regularly check the oil storage of the oil storage oil storage of oil，Add full oil according to regulations; check the cooperation between the piston ring and the cylinder set，Everbright wear should be repaired。

(3) The oil plate number is wrong，Small viscosity，Make the motor oil too thin。Replace the new machine oil。

(4) Overload of diesel engine，Make the oil temperature too high and thinner。Reduce the load of diesel engine，Det time overload work。

(5) The oil set filter is blocked，Reduce the inhalation volume of the oil and the pressure is too low。Cleaning machine oil set filter。

(6) Oil is too dirty，Time to use? And deterioration, etc.，Cover the filter or oil channel of the oil -absorbing disk。Should be replaced with new motor oil，Wash the filter fuel duct。

(7) After the oil pump is worn，Leaks the oil pump，The amount of oil in the pump is reduced，or the oil pump paper pad is damaged and leaks the motor oil。It can be compensated by reducing the thickness of the oil pump end covering pads.，If the amount of pump oil is still insufficient，Should be repaired or replaced with wear parts and damaged pads。

(8) Check whether the spring limit valve is too soft、Whether the valve has worn it too much。If the valve is worn normally，Then check whether the spring's elasticity should be insufficient。

(9) The oil circuit assembly from oil pump to the oil pump is not tight and leaks，If the oil -absorbing pipe is not tightly twisted, etc.。Re -installation，Eliminate the air leakage failure。

(10) The spindle、Reinforcement bearing，Mullet and other lubricating parts such as camshaft shaft and shaft cover，Gap increase，Repair? Replace new items。Repair? Replace new items，The cooperation relationship of restoring spare parts，Make it within normal range。

(11) The rotor of the rotor oil pump outside the rotor is reversed，Reduce the amount of pump oil。Re -installation，One end of the outer rotor to the outer circle should be installed in the oil pump。

2、In addition, the oil pump is damaged，If the gear and pump shell of the oil pump，Serious wear between pump shafts and bearing，or the failure of the pump shaft fracture pressure device，Makes the oil pump cannot establish normal work pressure。

After this happens,，The engine should be turned off immediately，To avoid serious mechanical accidents。Then disassemble the engine oil bottom shell，Key check the leakage site oil pump。

3、The pressure is normal when the engine is just started，After a period of running, the pressure pressure of the motor oil quickly decreases。Diagnosis of this kind of failure，Can analyze the changes in the engine lubrication system，To determine the possible cause of failure。

4、When the engine was just started，Due to before starting? Some oil flow back to the oil bottom，So the oil volume in the oil bottom shell is sufficient。After running for a while，Because some oil is pumped into the fuel duct for cycle，So the amount of seabet loginoil in the oil bottom shell is reduced。