Part 1: Removing fan
1. Turn on the fan to ensure that the motor is still in good condition. Plug in the electric fan and turn the wind to the maximum. If the fan blades move or start to rotate, the motor may be normal. If you can't hear anything, put your ear near the middle of the mask shell behind the blade. Press the button, turn off the fan and turn it on again. Listen carefully to the sound of the motor this time. If you hear a buzz, the motor may still be running. Try changing several jacks to try the fan. It is possible that the circuit breaker in the jack jumped, causing the fan not to be energized.
Tip: If the desktop fan and floor fan are broken, there is no need to go to great trouble most of the time, because the motor is probably broken. In this case, you'd better buy a new fan. However, if you still want to try it yourself, just disassemble the motor!
2. Unplug the plug of the electric fan, and then remove the net cover or loosen the fan shaft. Unplug the electric wire of the electric fan to prevent it from being accidentally opened during disassembly. Explore the side of the net cover and find the retaining ring that fixes the two parts together. If there is a buckle, open the buckle and remove the front net cover. If you can't find the hook that holds the blade assembly together, turn the middle part of the fan counterclockwise. If it is loose, unscrew it and remove the front net cover. The fan shaft is a metal part, which is located in the center of the fan and passes through the blades and the net cover.
The net cover, also known as the protective cover, refers to a plastic cover or a metal cover that prevents people from being stabbed by blades. On most fans, it either fixes the two components together through the buckle or keeps them tight by the middle cover.
If you find that the net covers are fixed together with screws, unscrew them with a screwdriver and then remove the net covers.
3. Turn the blade or washer in the center of the fan counterclockwise and remove it. Every fan is different, but it is not the small washer on the fan shaft or the cover of the fan shaft itself that locks the blades. If there is a plastic part blocking the center of the blade, loosen it counterclockwise and remove the blade. If there is no washer, press and hold the fan shaft, twist the blade base, loosen the washer and remove it from the fan shaft. Depending on the model of the fan, some fans may have a latch on the side of the fan shaft to fix the blades. The latch can usually be ejected and pressed in to lock or remove the blade.
4. Remove the rear screen cover from the intermediate fan shaft. First, remove all plastic or metal washers from the front of the rear screen cover. You may need to unscrew a few screws to secure the rear mesh cover. Remove all washers and remove the rear screen cover from the fan shaft. If there is a plastic washer on the front of the blade, there may not be one on the back. If the plastic gasket is not in the front, it is probably in the back. Washers are usually used as a stabilizing device for fixing blades.
If there is a plastic cover or cover in front of the motor, unscrew the cover covering the motor body.
5. Turn the fan over and find the screws on the back. When the fan shaft and the front of the motor are mostly exposed, turn the fan over and check the back of the motor cover. Most fans have cooling holes in the plastic casing for cooling and ventilation of the motor. There will be screws on the back to secure the cover. Unscrew the screws with a flat screwdriver or a Phillips screwdriver. Put them aside and pry open the lid. After unscrewing the screws, the cover may fall off the fan. If not, insert a flat-bladed or Phillips screwdriver into the cooling hole and pry it open.
The motor of some desktop fans is actually located under the base. If there is no big fan head behind the blade and the base is wide, unscrew the screw at the bottom of the fan and open the plastic cover.
Part 2: Lubricating bearings
1. Turn the fan shaft in front of the fan by hand to see if it rotates. Try to turn the fan shaft in the middle of the fan by hand. If there is sticking or excessive resistance, you may only need to lubricate the fan shaft. As time goes by, the lubricant on the fan shaft will be exhausted during the rotation of the fan blades. Refilling the fan shaft usually solves the problem. The dry and sticky fan shaft is the most common reason why the blades do not turn.
If they rotate smoothly without any obstruction, try to turn on the fan and see if the fan shaft rotates. If it doesn't turn, the problem is not the fan shaft, but the motor may be short-circuited. In this case, it may be more convenient to buy a new fan.
2. Unscrew all washers or bolts covering the fan shaft base. After the fan shaft is exposed, there may be/kloc-0 and/or two metal bolts fixed on the fan frame. Loosen these safety bolts with a wrench. You don't have to unscrew them completely, but you must be able to reach under them and touch the whole fan shaft. If there are no washers or bolts, skip this step directly.
The washer in this part of the fan assembly can usually be turned by hand.
3. Apply lubricating oil to the front and back of the fan shaft. Buy a bottle of fine-mouthed lubricating oil. Find a clean rag and put it under the fan shaft to catch the dripping oil. Align the bottle mouth with the position where the fan shaft is connected with the motor frame, pour it down, and squeeze the bottle above the front end of the fan shaft. Unscrew the bolt at the lubrication position and insert the lubricant bottle mouth under the bolt. Repeat this step on the back of the fan frame to lubricate both sides of the fan shaft. Any kind of lubricating oil will do. You can go to any car shop or construction shop to buy it.
To avoid getting oil on your hands, you can wear rubber gloves. Lubricating oil is non-toxic and harmless, and can be easily wiped off without washing hands with soap.
Warning: Cover the entire fan shaft with enough oil. However, don't let the oil get on the motor. If oil drops are found on the fan shaft, gently absorb the excess oil with a rag.
4. When rotating the fan shaft, rotate the bolts in the lubrication area. After the whole fan shaft is oiled, put the bolts back. Put down the rag and hold the bolt with the non-dominant hand. Grasp the fan shaft with your usual hand. While rotating the fan shaft by hand, slide the bolt back and forth in the lubrication area. Repeat this step for all bolts on the other side of the fan shaft assembly. This can ensure that the inner side of the bolt that plays a fixing role when the fan shaft rotates is oiled. Otherwise, there will be friction that hinders the rotation of the shaft.
If you like, you can also remove the bolts and oil them separately.
Part 3: Cleaning motors and cooling holes
1, check whether there is dust or dirt on the back of the motor housing and wipe it clean. Turn the fan and look inside the motor housing. Carefully wipe off the dust with a microfiber cloth. Clean the inside of the whole casing and wipe away the dust and dirt accumulated on the back of the fan. Poor ventilation will cause dust and heat in the motor housing to be unable to dissipate. Therefore, the fan will not be able to rotate, especially those products with overheating protection function. Once the temperature is too high, they will automatically open the circuit.
Warning: Do not use water when cleaning the area near the motor. Water entering the motor will cause short circuit or fan damage.
2. Purge the cooling hole of the plastic shell with compressed air. Before lubricating the fan, pick up the cover you unscrewed and keep it away from the motor. Blow both sides of the casing with compressed air to remove the dust between the heat dissipation grids, which is not easy to wipe here. Wipe the lid with a dry rag. If the vent hole has been blocked by dust or residue, it may be the chief culprit that causes the fan not to work normally.
If you want to clean the radiator thoroughly, you can soak it in soapy water and dry it. But generally speaking, it is not necessary to do so.
3. Plug in the electric fan and turn on the switch to see if the fan shaft rotates. Please insert the recovery fan before assembly. Turn on the switch to see if the fan shaft can rotate quickly. If possible, reassemble the fan. If not, you may need to clean the motor. However, this may be difficult and complicated, and it is usually not worth the trouble. The motors of many vertical and desktop fans cannot be disassembled at all, so it is very difficult to clean or adjust them.
4. Replace the blade and shell, and assemble and repair the fan. Perform these steps in the reverse order of removing the fan. Tighten the bolt on the fan shaft with a wrench, reinstall the washer, and then replace the net cover on the fan shaft. Put the blade in front and let the net cover at the back separate it from the motor. Put the plastic cooling cover back on the back of the motor cover and tighten it. Reassemble the front net cover and lock it. Turn on the fan again. If the speed of the blades is slower than the speed of the fan shaft when you test, it means that the motor is going to break down. It runs at too low power and cannot drive the fan at full speed.
You need to prepare