The precautions for using third-generation automotive wheel hub bearings are as follows:
Installation environment and tool requirements
Installation should be carried out in a clean and dust-free environment, as small particles entering the bearing will shorten its life.
Special tools (such as press machines, torque wrenches) must be used to avoid hitting or dropping bearings with hammers, and to prevent part displacement or seal component detachment.
. Before installation, check the fit size of the shaft and bearing seat. Even slight wear may cause poor fit and early failure. Sealing and Dust ProtectionDo not disassemble the wheel hub bearings or adjust the sealing ring, otherwise it will damage the sealing structure, causing water or dust to enter, resulting in corrosion of the inner race raceway and permanent failure of the bearing.
.For bearings with integrated ABS, the sealing ring contains a magnetic thrust ring. Before installation, it is necessary to stay away from magnetic fields (such as electric motors and power tools) to avoid collisions or impacts.
.Installation direction and testing of ABS bearings
When determining the position of the magnetic thrust ring, a light and small object can be placed near the edge of the bearing to determine the direction using magnetic attraction.
. During installation, the side with the magnetic thrust ring should be pointed inward, facing the ABS sensitive component. After installation, observe the ABS warning needle on the dashboard through road condition testing to confirm that the bearing operation is normal and avoid brake system failure. Lubrication and grease managementSealed bearings do not require lubricating grease throughout their entire lifespan;
; When installing non sealed bearings (such as double row tapered roller bearings), lubricating grease should be added, accounting for 50% of the bearing clearance, to avoid excessive grease leakage.Torque and Load Control
When installing the locking nut, the torque should strictly follow the instructions. Due to the different types of bearings and bearing seats, the difference in torque may cause the rolling elements to work in a non ideal state, resulting in deterioration of the raceway surface.
.Avoid overloading operation, otherwise the rolling elements will be in a non ideal state, accelerating the peeling of the raceway.
.Regular inspection and troubleshooting
Regularly check for early warning signals such as friction noise in bearings or abnormal deceleration when the suspension combination wheel turns.
. If you hear abnormal noise, you need to confirm the source of the noise, rule out the possibility of other moving parts coming into contact, and replace the damaged bearing in a timely manner. The failure conditions of the bearings on both sides of the front wheel hub are similar. Even if only one bearing is damaged, it is recommended to replace it in pairs.Operation monitoring and temperature control
If there is a "buzzing" sound coming from the chassis during driving and it increases with the speed of the vehicle, it may be due to abnormal bearing wear.
. You can lift the wheels with a lifting device, turn off the engine, rotate the tires, and listen for any abnormal noise to confirm the fault. After driving for a certain distance, stop and check the temperature of the wheel hub. If it heats up, it may be due to the bearing being adjusted too tightly, and the tightness needs to be readjusted.