1. The head does not shake or is insensitive. The first reason is that the head shake is blocked, which is caused by the deformation and bending of the connecting rod. At this time, there will be a "crack" sound. The deformed connecting rod can be removed. It can be eliminated after plastic surgery.

2. The transmission failure prevents the power from being transmitted. You can check the tooth rod, swing head plate, gear box, clutch, etc., if any is found to be falling off, stuck with foreign matter, or due to severe wear and tear. If the parts cannot be meshed, the lost parts should be eliminated or replaced.

3. Most electric fans use oil-containing bearings. Such bearings are usually powder metallurgy products. Tightly packed in the oil hole inside the bearing for lubrication. When the electric fan is working, the temperature of the motor rises, and the friction between the shaft and the bearing generates heat, which gradually consumes the lubricating oil. If the lubricating oil is not replenished as it should be, the electric fan motor will not be able to maintain normal operation, the speed will decrease or even stop rotating, and the motor will burn out. During the period of use of the electric fan, oil can be refilled from the oil filling port every 1 to 2 months. Sewing machine oil or spindle oil can be used.

4. Use lubricating oil (industrial petroleum jelly or calcium-based grease) in the reduction box of the electric fan, and usually replace it every 3 to 4 years. When replacing, first remove the rear cover, remove the balance key, and then remove the gear box cover. Use a small bamboo chip to gently scrape off the old grease inside, then wash it with clean gasoline, and then add an appropriate amount of new grease. grease.