The normal use color of KOYO bearing lubricants is brown and blue black. If it is milky yellow, it indicates that diesel oil or water is added to the oil and should be replaced in time. If it is dark black, it indicates that the oil has deteriorated and must be replaced in time.
The oil to be inspected is evenly mixed and dropped on a white paper (preferably a filter paper) to form oil spots, and the oil spots gradually diffuse from the center outward for about 2 to 3 hours to form three concentric rings. The state of the oil can be discerned based on the color, width and shape of the three areas.
Remove a little oil from the low shell of the oil, apply it on your fingers, and rub it with your fingers and thumb. If you feel that there is impurities in the oil or that it is not sticky like water, or even hairy or sour, the oil has deteriorated. If you can see a small shiny metal grinding on your finger after honing, it means that the engine has a serious wear part, and it also means that the oil must be replaced immediately.
1. Judging from KOYO bearing size specifications
First of all, it is necessary to focus on the KOYO bearing dimensional accuracy, rotation accuracy, internal clearance and mating surfaces, raceway surfaces, cages and seals. Then, for the result of the inspection, it can be judged by the inertial bearing or the master bearing.
2. Whether the KOYO bearing is reused
The criteria for judging the use of KOYO bearings are based on their mechanical properties and importance as well as the inspection cycle. In the event of breakage and defects in the bearing components and peeling of the rolling surface of the raceway, the bearings must not be reused and must be replaced.
In the process of using KOYO bearings, in order to be able to fully play and maintain its proper performance for a long time, regular maintenance measures should be taken. The use efficiency of the bearing can be improved by the following appropriate cleaning inspection measures.
3. Cleaning method of KOYO bearing
First remove the KOYO bearing and check it in, and make a good appearance record. Also, verify the amount of lubricant remaining and sample the lubricant before cleaning the bearings. In general, the cleaning agent used in KOYO bearings is neutral non-aqueous diesel or kerosene, and sometimes warm alkali is used as needed. Regardless of which cleaning agent is used, it is often filtered and kept clean. After cleaning the NTN bearing, it is necessary to apply anti-rust oil or anti-rust grease immediately.
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