Please note the following precautions for the use and installation of wheel bearings:

1. To maximize safety and reliability, it is recommended to regularly inspect wheel bearings regardless of the vehicle's age. Watch for early warning signs of bearing wear, including any friction noise during rotation or abnormal deceleration of the suspension-mounted wheels when turning. For rear-wheel-drive vehicles, it is advisable to lubricate the front wheel bearings after the vehicle has traveled 38,000 kilometers. When replacing the brake system, inspect the bearings and replace the oil seals.

2. If you hear noise from the wheel bearing area, first, it is important to locate the source of the noise. 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 the noise is confirmed to come from the bearing, the bearing may be damaged and needs to be replaced.

3. Since the front wheel hubs subject both side bearings to similar operating conditions, it is recommended to replace them in pairs even if only one bearing is damaged.

4. Wheel bearings are relatively sensitive and require proper methods and appropriate tools in all cases. During storage, transportation, and installation, the bearing components must not be damaged. Some bearings need to be pressed in with significant force, so special tools are required. Always refer to the vehicle manufacturer's instructions.

5. Bearings should be installed in a clean and tidy environment. Tiny particles entering the bearing can also shorten its service life. Maintaining a clean environment is crucial when replacing bearings. Do not strike the bearing with a hammer, and be careful not to drop the bearing (or handle it improperly in similar ways). Before installation, inspect the condition of the shaft and bearing housing as well—even minor wear can lead to poor fit, resulting in early bearing failure.

6. For wheel bearing units, do not attempt to disassemble the wheel bearing or adjust the seal of the wheel unit. Otherwise, the seal may be damaged, allowing water or dust to enter. Even the seal and the raceway of the inner ring may be damaged, causing permanent failure of the bearing.

7. Bearings equipped with ABS devices have a magnetic thrust ring inside their seals. This thrust ring must not be collided with, impacted, or exposed to other magnetic fields. Remove them from the packaging before installation and keep them away from magnetic fields, such as those from electric motors or power tools in use. When installing these bearings, observe the ABS warning light on the instrument panel through road tests to adjust the bearing operation.

8. For wheel bearings with ABS magnetic thrust rings, to determine which side the thrust ring is on, you can bring a small, light object close to the edge of the bearing—the magnetism generated by the bearing will attract it. During installation, face the side with the magnetic thrust ring inward, directly aligned with the ABS sensor element. Note: Incorrect installation may cause failure of the brake system.

9. Many bearings are sealed and do not require grease addition during their entire service life. Other non-sealed bearings, such as double-row tapered roller bearings, must be lubricated with grease during installation. Due to the different internal cavity sizes of bearings, it is difficult to determine the exact amount of grease to add. The most important thing is to ensure that the bearing contains grease—if there is too much grease, excess grease will seep out when the bearing rotates. A general rule of thumb: during installation, the total amount of grease should occupy 50% of the bearing's internal clearance.

10. When installing lock nuts, the torque varies greatly depending on the bearing type and bearing housing. Be sure to refer to the relevant instructions.