How to replace car hub bearings?

udgment skills of abnormal sound of wheel bearing:  

1.if the tire bearing is damaged, in the process of the vehicle wheels will be issued "hum" noisy abnormal sound.  If we hear such noise, slow down and carefully feel the source of the noise to eliminate the tire noise factor.  

2.lift the vehicle, swing the wheel around with your hand, check whether there is a gap in the bearing, and then turn the wheel by hand, and again feel whether it will send out the "hum" abnormal sound.  

3.if the abnormal sound has been clear, the tire bearing on the side of the abnormal sound can be removed, and check whether the bearing runs smoothly.  

4.if the bearing is found to operate freely, and there is no sign of damage, it can be guessed that the half shaft spline is lack of lubrication, try to test the half shaft spline and bearing spline coated with grease.  And if the bearing is damaged, it can be replaced directly.  

The main role of wheel bearings：

1.bearing and provide accurate guidance for the rotation of the hub;  

2.bear axial load and radial load.  

Worn wheel bearings can affect a vehicle's braking efficiency, suspension and critical braking safety characteristics, especially at high speeds.  Regular inspection of wheel bearings every 12 to 24 months is recommended.  You can do this by lifting the wheel off the ground using a jack.  Hold the wheel at the top and bottom of the wheel by hand and shake the wheel inward and outward.  If the wheel moves more than 1 cm laterally, the wheel bearing needs to be replaced.  

Wheel bearing kit includes the following:  

1 x Inner wheel bearings and race 1 x outer wheel bearings and race 1 x grease seal 1 x Grease pack 1 cotter pin 1 lock nut (if applicable)  

Step 1: Use hand brakes to secure the vehicle.  This will prevent the vehicle from moving forward or backward with the support of the safety bracket.  

Step 2: Loosen the front or rear wheel fastening nuts and push the front or rear wheels out of the ground.  A bracket is installed on each side of the vehicle as a safety support under the vehicle.  Remove retaining nut and front wheel.  

Step 3: Remove brake calipers from strut assembly.  Then use a flat-head chisel and hammer to remove the grease cap.  Remove cotter pin and loosen castle nut.  The hub assembly is now free and can be removed from the shaft.  The outer wheel bearing and washer are loose and can be easily removed.