How to identify diesel generator lubricant deterioration?

How to identify diesel generator lubricant deterioration?

After a certain period of use, lubricating oil is due to the contamination of mechanical impurities and dust from the outside world, the waste gas, moisture, particulate matter generated from fuel combustion, metal shavings worn out by operating parts, and carbon deposits produced by lubricating oxidative polymerization. It will deteriorate the oil.

How to identify whether the oil has deteriorated? You can distinguish these characteristics. After lubrication, it is dark black, foamy, and emulsified. It grinds with fingers, has particles, and has astringent or offensive odor. It is dark brown on the white test paper, with no yellow infiltration zone or many black spots. If you do not replace the lubricant in time, it will accelerate the wear of the components, affect the service life, or even cause a safety accident. Therefore, it is important to constantly check whether the lubricant is deteriorating and replace it in time. Several simple identification methods are described as follows:

1, oil flow observation method

Take two measuring cups, one of which contains the lubricating oil to be inspected. The other is empty on the tabletop. Lift the measuring cup full of lubricating oil 30-40 cm away from the tabletop and tilt it so that the lubricating oil flows slowly to the empty cup. In the observation of its flow, the good quality lubricant oil flow should be slender, even, continuous, if the oil flow appears to be fluctuating, and sometimes there is a large flow, it is said that the lubricant has deteriorated.

2, light law

On a sunny day, use a screwdriver to pry the lid of the oil box at a 45-degree angle from the horizontal plane. With the sunlight, the oil droplets were observed. Under light, it was clearly seen that no flaking in the lubricating oil was good and could continue to function. If the wear debris was excessive, the lubricating oil should be replaced.

3, hand method

The lubricant is rubbed repeatedly between the thumb and the index finger. The non-contaminated lubricant will feel fine particles and less debris. If you feel the large friction between the fingers such as sand, it indicates that there are many impurities in the lubricant. For use, new lubricants should be replaced.

4, smell smell method

This method is mainly used to check whether there is too much fuel in the oil, and whether the oil is oxidized or degraded (the oil has odor). The above methods are simple ways to use without detection, in order to be able to To determine clearly whether the oil has reached the oil change period or the quality of the new oil product, special testing equipment should be used for more scientific testing.

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