Front wheel bearing — removal and installation

Note. bearing catalog number see here.

Removing

Place the vehicle on a two-post lift, apply the parking brake and turn off the ignition.

Remove front wheel:

• remove the front wheel speed sensor (see here);
• Disconnect the front brake assembly from the steering knuckle and hang it from the front suspension spring (see here);
• remove front brake disc (see here);

• remove front brake disc cover (see here).

Disconnect the tie rod end from the steering knuckle arm (see here).




Remove steering knuckle (see here).



Next, press the hub out of the steering knuckle:




Install the base plate 3 on the press table, Figure 3-1, install the steering knuckle 2 on the plate, install the mandrel 1 with an outer diameter of 36.5 mm on the hub and press the hub 5 out of the steering knuckle (hydraulic press type KS-124 (Kochubeevsky plant "Automotive equipment"), a mandrel with an outer diameter of 36.5 mm for pressing out the hub - self-manufacturing, a base plate - self-manufacturing).



... in the absence of a press, resting the knuckle on the vise jaws (or on wooden blocks), strike with a hammer on the end of the hub through a mandrel or a head of a suitable size, press out the hub.



In this case, the inner ring of the bearing, located closer to the hub flange, remains on the hub. Use a screwdriver to pry off the protective washer that covers the bearing seal..




... and remove the puck.



We clamp the hub flange in a vice and insert a chisel between the ends of the inner ring of the bearing and the shoulder of the hub, strike with a hammer, thereby shifting the inner ring of the bearing along the hub.



Then you can use a puller to completely remove the inner race of the bearing from the hub.




Remove bearing circlip from steering knuckle (inner circlip puller type 65 44 60 21 size J 21 f. "Stahlwille").



Press the inner race of the bearing off the hub (set of pullers type 71 03 00 00 and 71 04 00 00 f. "Stahlwille").



Install stop 4 on the press table, Figure 3-2, install the steering knuckle 2 on the stop, install mandrel 1 with an outer diameter of 65 mm on the inner race 3 of the bearing and press the outer ring of the bearing out of the steering knuckle (hydraulic press type KS-124 (Kochubeevsky plant "Automotive equipment"), mandrel with an outer diameter of 65 mm for pressing out the outer ring of the bearing - self-made, stop - self-made).

OR...



... if a puller is not available, knock out the bearing using a drift of suitable diameter (e.g. socket head), since the pressed bearing is not suitable for reuse.

Installation

Attention. Before assembly, clean the mating surfaces of the steering knuckle, front wheel hub and bearing.

Attention. Before assembly, check the seating surfaces of the steering knuckle and the front wheel hub, replace defective parts.

Attention. When pressing the bearing into the steering knuckle, apply the pressing force to the outer race of the bearing. It is not allowed to press-fit by acting on the inner race of the bearing.

On vehicles with ABS, before installing the bearing, we insert the adjusting ring of the wheel speed sensor into the hole of the steering knuckle (paws centering the ring - inside the fist).



Orient the ring in the hole of the fist so that the holder of the speed sensor on the ring 1 is located in the groove of the fist 2 (for clarity shown on the assembled hub assembly).



Install stop 4 on the press table, Figure 3-3, install the steering knuckle 3 on the stop and press in the bearing, placing mandrel 1 with an outer diameter of 70 mm on the outer race 2 of the bearing for pressing (hydraulic press type KS-124 (Kochubeevsky plant "Automotive equipment"), mandrel with an outer diameter of 65 mm for pressing the bearing - self-made, stop - self-made).



Or, in the absence of a press, you can use a cup puller. For this:

Having installed the puller screw with the support washer, we insert a new bearing into the fist hole.



The bearing should be installed so that its dark-colored protective washer (made of magnetic material) facing the mounting ring of the wheel speed sensor.

We press in the bearing, applying force through the cup of the puller 1 to the end face of the outer ring of the bearing 2, while the washer of the puller 3 should rest on the steering knuckle.



After pressing the bearing, install a retaining ring in the groove of the knuckle (inner circlip puller type 65 44 60 21 size J 21 f. "Stahlwille").

Next, press the hub into the bearing:



Install stop 5 on the press table, Figure 3-4, install hub 4 of the front wheel on the stop and press fist 1 with the bearing assembly onto the hub, installing mandrel 2 with an outer diameter of 50 mm on the inner race 3 of the bearing for pressing (hydraulic press type KS-124 (Kochubeevsky plant "Automotive equipment"), a mandrel with an outer diameter of 50 mm for pressing - self-manufacturing, an emphasis - self-manufacturing.

Or, in the absence of a press, use the same cup puller:



When pressing the hub, the puller cup should rest on the end face of the bearing inner ring.

Install the steering knuckle to the vehicle.

Connect the tie rod end to the steering knuckle arm

• install the front brake disc cover;
• install the front brake disc;
• install the front brake assembly;
• Install the front wheel speed sensor.

Install the front wheel.

Press the brake pedal 2-3 times to set the pistons of the wheel brake cylinders to the working position.

Check and, if necessary, adjust the alignment of the front wheels.