Generally because "220V Cooling Fan" internal lubricant consumed caused by axial cooling fan need to add oil. Shanghai DC Blower CPU cooling fan on the lubricant varieties pleading no common lubricants can be used, but do not use large viscosity grease, or "220V Cooling Fan" will scroll ineffective. Remove the fan from the heat sink, opened the bottom of the seal (usually a black plastic sheet), you can see the fan axis, tweezers or a toothpick with a slight top items dropped on refueling, oil to General to shaft depth, not too much. After refueling immediately posted a good seal to prevent lubricant evaporation, inverted for some time to penetrate the interior of the bearing lubricant, the then "220V Cooling Fan" is fixed to the heat sink, cooling fan can be re-utilized.