How to tell if the lubricant can change

Source: Bearing network time: 2014-04-26

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Lubricating oil is dark black, foamy and has an emulsified appearance; rubbed with fingers; no sticky feeling; bun or odor; dripping on white test paper is dark brown; no yellow moisturizing area or black spots. Failure to replace in time will speed up the wear and tear of parts; affect the service life; and even cause a safety accident; therefore; it is especially important to check whether the lubricant can be changed and replaced in time.
Several simple methods of identification; the analysis is as follows:
1 The oil flow survey method takes two measuring cups; one is filled with lubricating oil; the other is placed on the table; the measuring cup filled with lubricating oil is lifted off the table 30-40 cm and tilted; let the lubricating oil gradually Flow into the empty cup; investigate its activity; the quality of the lubricating oil should be slender, uniform, and continuous; if the oil flow suddenly and slowly; sometimes there is a large flow; then the lubricant has changed .
2 The hand rubbing method rubs the lubricating oil between the thumb and the index finger repeatedly; the better lubricating hand feels lubricity, less wear debris, no conflict; if there is a large conflict between the fingers and the sand; It indicates that there are many impurities in the lubricating oil; it can not be reused; it should replace the new lubricating oil.
3 Illumination method on a clear day; use a screwdriver to pick up the lubricant; at a 45-degree angle to the horizontal plane. Check the sunlight; investigate the oil droplets; under the light; clearly see that there is no wear debris in the lubricating oil is outstanding; Sustainable effect; if there is too much wear debris; the lubricant should be replaced.
4 Take a clean white filter paper by oil droplet trace method; drop a few drops of oil on the filter paper; wait for the lubricating oil to leak; if there is black powder on the outside; if there is resistance in the hand, it will clarify the impurities inside the lubricant There are many; good lubricants have no powder; they are dry and lubricated by hand; they are yellow.

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