In order to ensure safety and reliability to the greatest extent, it is suggested that the wheel hub bearing should be checked frequently no matter how old the car is-pay attention to whether the bearing has early warning signals of wear, including whether there is friction noise during rotation or whether the suspension combined wheel slows down abnormally when turning. For rear-wheel drive vehicles, it is recommended to lubricate the front hub bearing when the vehicle travels to 38,000 kilometers. When replacing the brake system, check the bearing and replace the oil seal.

If you hear the noise from the hub bearing, it is very important to find the location where the noise occurs. There are many moving parts that may produce noise, or some rotating parts may come into contact with non-rotating parts. If noise is confirmed in the bearing, the bearing may be damaged and needs to be replaced.

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Precautions:

1. Hub bearings are sensitive, and correct methods and tools are needed in any case. Bearing parts shall not be damaged during storage, transportation and installation. Some bearings need a lot of pressure to press in, so special tools are needed. Be sure to refer to the automobile manufacturing instructions.

2. For the hub bearing unit, do not attempt to disassemble the hub bearing or adjust the sealing ring of the hub unit, otherwise the sealing ring will be damaged and water or dust will enter. Even the sealing ring and the raceway of the inner ring are damaged, resulting in the permanent failure of the bearing.

3. Many bearings are sealed, and this kind of bearing does not need lubrication during the whole life. Other unsealed bearings, such as double-row tapered roller bearings, must be lubricated with grease during installation.

4. It is difficult to determine how much grease to add because of the different sizes of bearing cavities. The most important thing is to ensure that there is grease in the bearing. If there is too much grease, when the bearing rotates, the excess grease will seep out.

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