If during movement there is extraneous noise in the area of the rear wheel (usually a whistle or howl, which increases with increasing speed, strong heating of the hub), then the bearing is out of order and needs to be replaced
By tightening the hub nut, the play of this bearing cannot be eliminated (if this nut is tightened, there will be progressive wear, the axial play should not exceed 0.03 mm).
In the figure 1, the details of the rear wheel hub.
We replace the bearing on a viewing hole or a lift.
Release the rear wheels.
Remove the rear wheel.
Fully lower the parking brake lever.
Remove the rear wheel.
With a chisel we knock down and remove the protective cap of the hub bearing.
Unscrew the hub nut.
Remove the brake drum
After removing the brake drum, do not press the brake pedal, as the pistons may completely come out of the wheel cylinder.
Mounting the bearing in the hub (Fig. 5)
On the outer side of the drum, use special pliers to remove the retaining rings, remove the retaining ring of the bearing.
The bearing to be replaced is pressed out of the drum socket with a cup puller
You can knock out the bearing using a suitable drift by placing two blocks of wood under the brake drum.
Before installing a new bearing, we clean the seating surface under it in the brake drum.
Insert the bearing into the drum seat.
We press in the new bearing with the puller until it stops, applying force through the mandrel to the outer ring of the bearing.
In this case, the outer ring of the old bearing can be used as a mandrel.
By supporting the puller cup on the other side of the drum when pressing in the bearing on a vehicle with ABS, be careful not to damage the rear wheel speed sensor ring.
Install the retaining ring in the groove of the drum.
Checking the condition of the trunnion.
If its seating surface for the wheel bearing or the thread for the nut is damaged, we replace the axle of the rear wheel hub.
To do this, use the E-16 head, unscrew the four screws securing the rear wheel trunnion to the rear suspension beam flange, remove it and install a new trunnion.
We mount the brake drum on the trunnion. Bolt tightening torque 80 Nm.
Tighten the rear wheel hub bearing nut to 175 Nm.