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The whole process of wheel bearing maintenance

wallpapers Products 2020-10-25
Car maintenance is a continuous activity, and good maintenance at ordinary times has a great effect on safe driving. Therefore, the majority of car owners should pay more attention to the daily maintenance of cars. The maintenance of hub bearings is very important. This article will introduce you to the whole process of wheel bearings maintenance
1. Remove the decorative cover and dust cover of the hub axle head;  
2. Remove the tire but do not damage the thread of the tire bolt. If it is a disc brake, remove the brake, and then remove the lock ring or lock pin with a tool.
3. Use special tools to remove the hub bearing;  
4. Clean up the old grease, clean it with detergent, then dry it with a cloth, and finally wipe the inner cavity of the bearing with a cloth. 
5. Check the hub bearing and the bearing race. If there are cracks, fatigue peeling and loose bearing rollers, the bearing should be replaced. If pitting is found on the bearing race, the bearing should also be replaced. 
6. Check the fit between the inner diameter of the bearing and the journal. The fit gap should not be greater than 0.10mm. When measuring the journal, it should be measured at the upper and lower parts of the vertical ground (the place is the largest wear part). If the fit gap exceeds the specified limit of use, the bearing should be replaced to restore the normal fit gap. Burrs and pits on the journal are not allowed to narrow the gap. 
7. After all the parts meet the requirements, the inner shaft coated with grease can be put into the hub.
8. Pay attention when applying grease. The amount of application is also required. You need to apply it from one end of the bearing to the other side of the bearing until it comes out. However, do not apply too much in the cavity.
9. Reinstall both the hub and the outer shaft on the shaft diameter, screw on the shaft adjustment nut by hand, and then use the shaft wrench to tighten the adjustment nut according to the specified torque. After tightening the nut, turn the hub a few turns left and right to see the installation of the bearing; on the other hand, make the bearing and the seat ring fit correctly by turning. At this time, the bearing tightness is appropriate and the wheel rotates freely without feeling the axial clearance.
10. Finally, install the lock piece, fixing nut, tire, dust cover and decorative cover in sequence.  
11. After adjusting the wheel hub bearing, drive for a certain mileage (about 10km), stop and check the temperature of the wheel hub with your hands. If it gets hot, it is caused by the over-tightening of the bearing. Re-adjust and loosen the bearing tightness.

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