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During the process of bearing, grease is very critical. If using bad grease, not only due to play the role of, and also can damage the bearings.
1, and oil flow observation law: take two only measuring cup, which a Sheng to be check of lubricant, another a only empty put in desktop Shang, will Sheng full lubricant of measuring cup lift high left desktop 30-40 cm and tilt, let lubricant slowly flow to empty Cup in the, observation its mobile situation, quality good of lubricant oil flow Shi should is slender, and uniform, and continuous, if appeared oil flow suddenly fast suddenly slow, sometimes has chunks shed, is said lubricant has metamorphic.
2, hand-twisted laws: lubricating oil between the thumb and index finger back and forth grinding of twist, a good lubricant lubricant hand feel, less dust, friction-free, grit like a larger sense of friction between your fingers, then oil impurities, can no longer be used and should be replaced with new lubricant.
3, the illumination method: on a sunny day, use screwdriver to lift lubricating oil, with the water level angle of 45 degrees. Against the Sun, observing oil droplets, light, you can clearly see no debris in lubricating oil for good may continue to function, if too much dust, oil changes.
4, oil drops traces method: take a clean white filter paper, drip a few drops of water on the paper, after treating the leakage of lubricant, if surface has black powder, tart touch resistance, then the impurities inside has lots of lubricating oil, good lubricating oil-free powder, feels dry and smooth with your hands, and yellow trail
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