Pic. 3.159. Rear wheel hub
Withdrawal
Raise the car and remove the wheel.
Pic. 3.160. Measuring the axial clearance of a bearing
After removing the hub cap, remove the flange nut and lock washer (pic. 3.160).
Remove the brake drum.
Remove the brake hoses.
Remove the parking brake assembly.
Remove the parking brake cable.
Remove the four bolts securing the axle to the lower control arm and remove the rear axle, guard and rear wheel hub assembly.
Examination
Check the rear wheel hub assembly for wear or damage.
Check the rear axle for cracks or damage.
Check the protective cover for excessive deformation and damage.
Checking the axial clearance of the wheel bearing
Pic. 3.161. Flange nut and lock washer
Install the dial gauge as shown in Figure 3.161.
Measure the axial clearance of the wheel hub bearing by moving the hub in the axial direction.
Limit value: 0.05 or less
If the value of the axial clearance exceeds the maximum permissible value, then it is necessary to tighten the hub nut to the specified tightening torque and then re-measure the value of the axial clearance.
If the re-measured value is greater than the maximum permissible value, then it is necessary to replace the rear wheel hub assembly with the bearing.
Checking the resistance to rotation of the wheel bearing
To properly install the wheel bearing, turn the wheel hub several times.
Pic. 3.162. Checking the resistance to rotation of the wheel bearing
Then wind the rope around the hub bolts to the end of the rope, attach a spring dynamometer and pull it in a horizontal direction so that the hub rotates 90° (pic. 3.162).
Maximum allowable resistance to rotation of the rear wheel hub bearing: 27 N or less.
If the measured resistance to rotation of the hub bearing is greater than the maximum allowable value, then it is necessary to loosen the hub nut and then tighten it to the specified tightening torque, and then re-measure the resistance to rotation of the hub bearing.
If, after adjustment, the measured value is greater than the maximum permissible value, then it is necessary to replace the rear wheel hub assembly with the bearing.
Installation
Installation is made in an order, the return to removal.
Note. After replacing the rear wheel hub assembly, add brake fluid and bleed the brake system.