Identify whether the lubricating oil deterioration

Can identify the lubricating oil system of metamorphic several tips smooth after abnormal black oil, foamy and has appeared emulsification phenomenon, grinding with finger, no loose sense, astringency and peculiar smell, drop on the white test is dark brown, no yellow infiltration area or many black spots. If you don't change in time, will speed up the process of wear parts, affect the service life, and even against the whole accident. Therefore, check whether smooth oil can timely change and change is very important. Here are some simple identification method: (1) oil flow to examine method take two cups, one containing smooth oil check, another empty on the desktop, lift the cup with lubricating oil, 30 - to the desktop 40 cm and tilt, make smooth oil gradually into the empty cup, to check its activity, good quality and smooth flow to thin, straight, if the oil flow suddenly slow, large flow, sometimes called smooth oil change. (2) hand twist twist will smooth oil between the thumb and index finger can reuse grinding, good smoothness smooth oil hand feel, less abrasive dust, no friction, if feel fingers development between trade friction, such as sand of indicates a smooth oil the impurity, more can't no use, should change new smooth oil. (3) the illumination method on a clear day, lubricating oil is raised with the screwdriver, and the degree of the surface of the 45 degree Angle. Conditions of droplet control view, the sun in the light, you can see, smooth and transparent oily matter does not wear debris as well, we can continue to action, if excessive wear debris, lubricating oil should be replaced. (4) oil droplets trace method can take a clean white paper, number of oil drops on the filter paper, after being smooth oil leakage, if appearance is black metal powder, use hand to touch resistance acerbity feeling, is to clarify a smooth oil without impurities have many inside, good smooth oil powder, with the hand feels dry and lubrication, and yellow trace information. A: identification of the quality of the stainless steel bearing next up: none