Teach you how to tell if the engine oil is deteriorating

Friendly Tip: It is of utmost importance to constantly inspect whether the lubricant is deteriorating. Not only does it allow the aerial vehicle to run freely, but it also extends the service life of the aerial vehicle . Aerial can see whether the deterioration of oil through the following identification method.
First, the oil droplets method
Take a clean white filter paper, a few drops of oil on the filter paper. After the oil leaks, if there is black powder on the surface, there will be a sense of resistance to the touch, which means that there are many impurities in the lube oil. , good lubricant without powder, dry and smooth by hand touch, and yellow marks.
　
Second, hand method
Lubricate the oil repeatedly between the thumb and index finger. The better lubricator feels lubricity, less rubbing, and no friction. If you feel the large friction between the fingers, such as sand, it means working at heights. There are many impurities in the car's lubricating oil that cannot be reused and new lubricants should be replaced.
Third, light law
On a clear day, use a screwdriver to pry the lubricating oil 45 degrees from the horizontal plane. In contrast to sunlight, oil droplets are observed. Under light, it can be clearly seen that there is no wear debris in the lubricating oils of the aerial vehicles. It can continue to function. If the wear debris is excessive, the lubricating oil should be replaced.

Fourth, the oil flow observation method
Take two measuring cups, one of which contains the lubricant to be inspected. The other is empty on the table top. Raise the cup full of lubricating oil 30-40 cm from the tabletop and tilt it. Let the oil flow slowly to the empty cup. In the observation of the flow conditions, the lubricant oil flow of a good quality aerial working vehicle should be slender, even and continuous. If there is a sudden and fluctuating oil flow, and sometimes there is a large flow, the lubricant is said to have deteriorated.

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