The usage of automotive wheel hub units involves multiple aspects such as installation, lubrication, inspection, and maintenance. The following is a detailed usage method:
1、 Installation
Preparation: Ensure that the workplace is clean and prevent dust and impurities from entering the bearings.
Check whether the wheel hub unit and its accessories are intact, including bearings, flanges, bolts, etc.
Installation steps: For wheel hub bearings with ABS magnetic thrust rings, it is necessary to determine the installation direction of the thrust ring and ensure that it is facing the sensitive components of ABS.
Choose the appropriate installation method based on the design of the vehicle model and wheel hub unit. The common installation methods include wheel hub bolt and nut fixation and flange fixation.
During the installation process, appropriate tools should be used to avoid hitting the bearings with hard objects such as hammers to prevent damage.
Ensure the correct installation position of the bearing, good fit between the inner ring and the outer diameter of the shaft, and tight fit between the outer ring and the hub seat hole.
When tightening bolts, the specified torque should be applied to avoid over tightening or over loosening.
2、 Lubrication
Lubrication method selection: The lubrication methods for automotive wheel hub bearings mainly include full hub lubrication and empty hub lubrication. Although full hub lubrication is traditional, it has problems such as poor heat dissipation and increased resistance. Therefore, it is recommended to use empty hub lubrication.
When selecting lubricating grease, full consideration should be given to usage conditions such as temperature, load, speed, etc. Common lubricating greases include calcium based grease, lithium based grease, etc.
Lubrication operation: Before installation, an appropriate amount of lubricating grease should be applied to the rolling elements and raceway surfaces of the bearing.
After installation, check whether the lubricating grease is evenly applied to ensure that the interior of the bearing is fully lubricated.
3、 Inspection and maintenance
Regular inspection: Regularly check the operating status of the wheel hub unit, including temperature, vibration, and noise indicators.
Check if the sealing of the bearing is good to prevent grease leakage or external impurities from entering.
Cleaning and maintenance: Regularly clean the surface and surrounding environment of the wheel hub unit to avoid the accumulation of dust and impurities.
Clean the wheel hub unit with a neutral cleaner and avoid using strong acid or alkali cleaners to prevent surface corrosion.
During the cleaning process, it is advisable to avoid using brushes or hard objects such as wire balls with hard bristles to avoid scratching the surface.
Replacement and Upgrade: Timely replace damaged or aging components based on the service life and wear of the wheel hub unit.
Pay attention to the development trends of new technologies and products, and timely upgrade and replace wheel hub units to improve vehicle performance and reliability.
4、 Precautions
When installing and disassembling wheel hub units, ensure that the vehicle is in a stable state and follow the correct operating procedures.
Avoid applying excessive impact or vibration on the wheel hub unit to prevent damage to the bearings or seals.
If any abnormal phenomena are found during use (such as high temperature, increased noise, etc.), the vehicle should be stopped immediately for inspection and troubleshooting.
In summary, the use of automotive wheel hub units involves multiple aspects such as installation, lubrication, inspection, and maintenance. Following the correct usage methods and precautions can ensure the normal operation and prolong the service life of the wheel hub unit.