However, it also happens that the bearing fails and has to be replaced. Workshops have enough necessary tools and equipment to replace the wheel bearing. The most useful tool is the puller, which is used to extract the inner bearing ring that remains on the flange after removing the hub. If you have such a puller, there is no reason to refuse to perform work on replacing the hub bearing. The hub bearing is pressed in and therefore a hydraulic press is required to press the bearing in and out. When purchasing a new wheel bearing, please specify the vehicle model, as the bearings, although identical, are not the same for all models.
The order of execution of works is as follows.
1. Remove the shock absorber strut and clamp it in a vice. Be careful not to deform the strut when clamping it in the vice.
2. Remove both brake disc bolts and remove the brake disc from the hub.
3. Wipe the steering knuckle on the side where the hub bearing is located with a clean rag so that you can see the retaining ring that holds the bearing in the steering knuckle. Remove this retaining ring with needle-nose pliers (see illustrations).
3.3a Retaining ring 1, which holds the hub bearing in the steering knuckle 2
Z.Zb Remove the retaining ring from the steering knuckle using needle-nose pliers
To remove the hub or bearing, you will need the appropriate pullers. The most convenient is the so-called hammer puller. The hammer puller rod is inserted into the hub hole and rests against the bearing. The rod is driven into the hole with a hammer and pushes out the hub flange together with the bearing (see illustration 3.0a).
3.0a Pressing out the hub bearing using a hammer puller.
1 - hammer
2 - pressing nozzle of the puller rod
If you don't have a hammer puller, the hub bearing can be pressed out or even knocked out using a suitable punch.
The inner ring of the hub bearing remains in the hub and must be removed from there. To do this, use a puller, as shown in Illustration 3.0b. If necessary, the ring can be loosened with a chisel.
3.0b Removing the inner ring of the hub bearing using a puller
4. Clean all parts thoroughly and check their condition. The bearing must be replaced in any case.
5. Make sure the bearing retaining ring is in good condition.
6. Lubricate the new bearing with a generous amount of multi-purpose grease.
The procedure for installing a new hub bearing is as follows.
7. Press the new bearing into place using a piece of pipe of the same diameter as the outer ring of the bearing.
8. Make sure the bearing race is properly seated in the steering knuckle bore and install the snap ring. If the bearing retaining ring was deformed during removal, it should be replaced with a new one. Make sure the snap ring is properly and securely seated.
9. Press the hub onto the steering knuckle. In this case, place the hub so that the steering knuckle with the hub bearing installed can be placed on it. After this, press the assembly together so that the hub fits onto the bearing. Place the pressing rod onto the inner ring of the bearing. The protective plastic ring on the hub bearing is destroyed during the pressing process and can be removed after installation is complete (see illustration).
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3.9 Pressing in the hub bearing. Pressing rod 1 must stand on the inner ring of the bearing.
10. Remove any excess grease pressed in during pressing and recheck the position of the retaining ring in the bearing bore on the steering knuckle.