Cause and Solutions for Low Generator Oil Pressure

Low oil pressure is one of the common faults of generator. The method of quick troubleshooting is helpful to solve the problem in time. Below Guangxi Dingbo Generator Set Manufacturing Co.,Ltd., will teach you how to accurately find the cause of generator engine oil pressure problem.

1. Check the oil pressure display device

Use replacement method to check, that is to replace the oil pressure gauge or sensor. If the oil pressure display is normal after replacement, the oil pressure display device has trouble. If the oil pressure indicator is normal, the oil pressure is reduced, and the fault is in the lubricating part, the following method should be used to judge.

Check oil temperature

If the oil temperature is too low and the oil pressure is also low. But when the temperature rises, the oil pressure is still normal, it is due to the excessive oil and the bad oil passage. For example, the original impurity of the oil filter is affected by the original impurity and the oil pressure is reduced, but it is still within the specified range when the oil viscosity is too large. The oil pressure is too low and the oil pressure is too low; some diesel engine oil pressure display device is located at the end of the lubricating oil road. When the filter is difficult, the oil pressure is reduced. When the value is lower than the specified value, the oil pressure is too low. Then, the oil should be further examined. The reasons for the thickening (the selection of the oil number and the season are suitable, the oil deterioration, etc.) and the blockage of the oil channel (such as the filter, filter, air cooled radiator, etc.) should be eliminated.

If the oil pressure drops when the oil temperature is high, it indicates that the oil viscosity is too small or friction parts have large clearance or leakage. The reasons for the decrease of viscosity should be found out further (such as improper selection of oil grades, poor quality of oil, poor viscosity and temperature stability, or the mixing of diesel and oil to dilute the oil). It is necessary to find out whether there is an oil leak or if the clearance of the matching parts (such as crankshaft and bearing, connecting bar shaft diameter and bearing) is too large, and the engine has been used for a long time, which should be dealt with pertinently.

2. Judging according to the service life of the equipment

If the oil pressure is too low and the failure occurs during the running period, most of the faults are suspected to be acrobatic clogging filters such as metal chips in the machine parts or moulding sand in casting, or if the pipes are bent and shrunken. Or improper assembly of oil leakage (such as too large bearing clearance, pipe joints or joint plane sealing) and so on.

3. Diagnosis by sudden and progressive reduction in oil pressure

If the oil pressure drops suddenly, indicate that the pipe or gasket ruptures, should identify and eliminate the leak.

If the oil pressure decreases gradually with the prolongation of service time, check whether the oil pressure is clogged, worn, oil deterioration, etc., find out the cause and remove it.

If the oil pressure decreases gradually with the prolongation of service time, check whether the oil pressure is clogged, worn, oil deterioration, etc., find out the cause and remove it. In general, a single cause may have an effect on oil pressure, but not too low. The condition of oil storage and deterioration should be checked before diagnosis. If both do not meet the requirements, this is one of the reasons for the decrease in oil pressure. The filter should be removed again to check the clogging of mechanical impurities, if there is a clear clogging, it is the fault. It is also possible to check the fit clearance between the crankshaft and the associated bearing. If the wear is increased, it is also one of the reasons for the reduction of the oil pressure.

4. Check pressure limiting valve

Remove the pressure limiting valve after cleaning and reload and adjust (increase spring elasticity), if the oil pressure increases, it is the fault that the oil pressure is too low.

According to the above inspection method, you can find the source of the problem, the right remedy. It should be noted that if the generator is close to the wear and tear period, it is most likely due to increased leakage of the lubricating system and low oil pressure caused by the clogging of the filter or pipeline, the generator needs to be overhauled in time.