- Puller protective cap - Rou. 15-01
- Hub retainer - Rou. 604-01
- Ball joint puller - T.Av. 476
- Drive shaft puller - T.Av. 1050-02
Tightening torques:
- Drive shaft nut - 280 Nm
- Wheel bolt - 90 Nm
- Shock absorber support bolt - 180 Nm
- Brake caliper bolt - 100 Nm
- Ball joint nut - 37 Nm
- Lower arm nut to hub - 55 Nm
To replace the bearing, it is also convenient to use a commercially available puller for pressing out and pressing in the hub bearings.
The front wheel bearings do not require maintenance during the operation of the car and are replaced only in case of increased wear. To determine the condition of the bearing, a dial indicator is used, a bracket (rack) which is attached to the steering knuckle. Press the indicator leg against the brake disc, the swing of which will give an assessment of the condition of the bearing. If the indicator value exceeds 0.05 mm, the bearing must be replaced.
Attention! Attempting to reduce bearing clearance by over-tightening the hub nut will result in accelerated bearing failure.
When the bearing is pressed out, it is destroyed and replaced with a new one.
Removing
1. Disconnect the battery.
2. Remove the front wheel.
3. Remove the brake caliper and hang it to the side by the wire.
4. Loosen the guide arm ball joint nut, remove the control arm from the hub using a T.Av. 476.
5. Turn away a nut of fastening of a power shaft.
6. Push the shaft out of the hub using the T.Av. 1050-02.
7. Remove the brake disc.
8. Turn away a nut of fastening of a spherical support of the bottom suspension bracket, disconnect the lever from a nave.
9. Turn away two bolts of a support of the shock-absorber.
10. Remove the hub assembly.
11. Using a press, press the hub out of the housing.
12. Remove the retaining ring.
13. Using a press and a suitable mandrel, squeeze the hub bearing out of the housing.
Install the mandrel along the inner ring of the bearing.
Thoroughly clean the steering knuckle and hub from grease and dirt, remove possible nicks and burrs with a needle file. Inspect parts for cracks or other damage. The bearing and retaining ring are replaced with new ones.
Installation
- make sure (if it is possible) presence of lubrication in the inner cavity of the bearing;
- lightly lubricate the surfaces of the bearing rings with grease;
Figure 5.10. Pressing the bearing into the steering knuckle
- using a press, press the bearing into the steering knuckle using a mandrel with an outer diameter of 70 mm and an inner diameter of 66 mm, applying force to the outer ring (Figure 5.10);
- install a new retaining ring in the groove on the steering knuckle;
Figure 5.11. Pressing the bearing onto the front wheel hub
- put the inner race on the hub and press the bearing onto the hub using a mandrel with an outer diameter of 48 mm and an inner diameter of 42 mm, applying a load to the inner bearing race (Figure 5.11);
- make sure that the hub flange rotates freely and remove excess grease;
On vehicles equipped with ABS, install the wheel speed sensor bracket so that the X angle is 35'±5'.
Install the steering knuckle as described above.
Check and, if necessary, adjust the wheel alignment.