What's the wheel bearing?

The traditional automobile wheel bearing is composed of two sets of tapered roller bearings or ball bearings. The installation, oiling, sealing, and clearance adjustment of the bearings are all carried out on the automobile production line. This structure makes it difficult to assemble in an automobile production plant, with high cost and poor reliability, and the bearings need to be cleaned, oiled, and adjusted when the automobile is maintained at the maintenance point.

1. hub bearing unit

2. Jack joint

3. Jack joint

4.  

It is developed on the basis of standard angular contact ball bearings and tapered roller bearings. It integrates two sets of bearings, which have good assembly performance, can omit clearance adjustment, is lightweight, compact structure, large load capacity, and Sealed bearings can be preloaded with grease, omit external hub seals, and be free from maintenance.

Precautions

Worn or damaged hub bearings or hub units can cause unsuitable and costly failure of your vehicle on the road, or even harm your safety. Please pay attention to the following matters in the use and installation of wheel hub bearings:

1. To ensure maximum safety and reliability, it is recommended that you always check the wheel 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 when turning or the suspension combination wheel is turning, or unusual deceleration.

For rear-wheel drive vehicles, it is recommended that the front wheel hub bearings be lubricated when the vehicle travels 38,000 kilometers. When replacing the brake system, check the bearings and replace the oil seal.

2. If you hear the noise from the hub bearing, first of all, it is important to find the place where the noise occurs. There are many moving parts that may produce noise, and it may also be that some rotating parts are in contact with non-rotating parts. If it is confirmed that it is the noise in the bearing, the bearing may be damaged and needs to be replaced.

3. Because the working conditions of the front hub, which cause the failure of the bearings on both sides, are similar, even if only one bearing is broken, it is recommended to replace them in pairs.

4. The hub bearing is more sensitive, and in any case, the correct method and suitable tools need to be used. In the process of storage, transportation, and installation, the parts of the bearing cannot be damaged. Some bearings require greater pressure to be pressed in, so special tools are required. Be sure to refer to the car manufacturer's 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 hit the bearing with a hammer, and be careful not to drop the bearing on the ground (or similar mishandling). The condition of the shaft and bearing housing should also be checked before installation, as even a small amount of wear can lead to a poor fit, which can lead to early failure of the bearing.

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 if the raceways of the sealing ring and inner ring are damaged, it can result in permanent failure of the bearing.

7. There is a magnetic thrust ring in the sealing ring equipped with the ABS device bearing, which cannot be collided with or impacted by other magnetic fields. Take them out of the box before installation and keep them away from magnetic fields, such as motors or power tools in use. When installing these bearings, change the operation of the bearings by observing the ABS alarm needle on the instrument panel through a road test.

8. For the hub bearing equipped with ABS magnetic thrust ring, to determine which side the thrust ring is installed on, a light and small object can be used to approach the edge of the bearing, and the magnetic force generated by the bearing will attract it. When installing, point the side with the magnetic thrust ring inward, facing the sensitive element of the ABS. Note: Improper installation may cause the brake system to fail.

9. Many bearings are sealed, and these bearings do not need to be greased throughout their life. Other unsealed bearings, such as double row tapered roller bearings, must be lubricated with grease during installation. Due to the different sizes of the inner cavity of the bearing, it is difficult to determine how much grease to add. 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. General experience: During installation, the total amount of grease should account for 50% of the bearing clearance.

10. When installing the lock nut, the torque varies greatly due to the different bearing types and bearing seats. Pay attention to the relevant instructions.