Lubricating bearings "Waterproof Cooling Fan" transport the most important parts is bearing a long time the lack of oil, will generate noise such high-speed rotation. Therefore, we only need a few drops on the fan bearing lubricant, sewing machine if you do not use can be replaced. But be careful do not use oil instead, because of its relatively large particles, easy to damage the bearings. Fixed blade vibration noise also is "Waterproof Cooling Fan" an important part of the noise, because loose leaf on bearings and bearing wear resulting in the gap becomes larger and so on, so only need to remove the sub-sector, the screws tight button, so prison After firmly fixed, it will not shake. Polished blades additional use poor quality "Waterproof Cooling Fan", in the production of this type of fan due to defects in workmanship, the center of gravity may not be in the blades on the axis, forming a "eccentric" and use over time, fan The "eccentric" phenomenon will become more serious, it will not only produce noise, serious damage may also CPU. In this regard, can be removed altogether, and then thread hanging from its center position, let it sink still to see which direction to put an end to sink in light grinding wheel a few times, and then tested, has been After the fan can be installed in a horizontal position and then go to.