1. In order to maximize safety and reliability, it is recommended that you always check the hub bearings no matter how old the car is-pay attention to whether the bearings have early warning signs of wear: including any friction noise during rotation or abnormal deceleration of the suspension combination wheel when turning.For rear-wheel drive vehicles, it is recommended that the front wheel hub bearings should be lubricated when the vehicle travels to 38,000 kilometers.When replacing the brake system, check the bearing and replace the oil seal.
2. If you hear the noise from the bearing part of the hub, first of all, it is important to find the location where the noise occurs.There are many moving parts that may produce noise, and it may also be that some rotating parts have come into contact with non-rotating parts.If it is confirmed that it is noise in the bearing, the bearing may be damaged and needs to be replaced.
3. Because the working conditions for the failure of the bearings on both sides of the front wheel hub are similar, even if only one bearing is broken, it is recommended to replace it in pairs.
4. Hub bearings are more sensitive, and the correct methods and suitable tools need to be used in any case.During the storage, transportation and installation process, the bearing parts cannot be damaged.Some bearings require greater pressure to be pressed in, so special tools are required, and you must refer to the automobile manufacturing manual.
5. When installing the bearing, it should be in a clean and tidy environment. The entry of fine particles into the bearing will also shorten the service life of the bearing.It is very important to maintain a clean environment when replacing bearings.It is not allowed to strike the bearing with a hammer, and be careful that the bearing does not fall to the ground (or similar improper handling).The condition of the shaft and bearing seat should also be checked before installation. Even minor wear and tear can lead to poor fit, which can cause early bearing failure.
6. 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 raceway of the sealing ring and the inner ring are damaged, causing permanent bearing failure.
7. There is a magnetic thrust ring in the sealing ring equipped with the bearing of the ABS device. This thrust ring cannot be subject to collision, impact or collision with other magnetic fields.Remove from the packaging box before installation and keep them away from magnetic fields, such as electric motors or power tools used.When installing these bearings, the operation of the bearings is changed by observing the ABS alarm needle on the instrument panel through the road test.
8. Hub bearings equipped with ABS magnetic thrust rings. In order to determine which side of the thrust ring is installed, you can use a light thing close to the edge of the bearing, and the magnetic force generated by the bearing will attract it.When installing, point one side of the magnetic thrust ring inside, facing the sensitive components of the ABS.Note: Incorrect installation may cause the function of the brake system to fail.
9. Many bearings are sealed, and such bearings do not need to be greased during their entire life.Other unsealed bearings, such as double-row tapered roller bearings, must be greased and lubricated during installation.Due to the different sizes of the inner cavities of the bearings, it is difficult to determine how much grease is added. 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 ooze out.General experience: During installation, the total amount of grease should account for 50% of the bearing clearance.
10. When installing lock nuts, the torque varies greatly due to the different bearing types and bearing housings. Note to refer to the relevant instructions.
