In this article, we'll look at how to remove the steering knuckle and replace the front axle hub bearing
Preparing the car for the task
Loosen the wheel mounting nuts on the side of the work being performed
Raise the car and securely fix it on supports
Remove the front wheel. Tightening torque of wheel nuts 90-110 Nm
Unscrew the mounting bolt and disconnect the front wheel speed sensor from the steering knuckle. Tightening torque of the bolt is 7-10 Nm.
Unscrew the brake caliper mounting bolts (tightening torque of the bolts is 80-100 Nm).
Then we secure the caliper assembly to the shock absorber strut spring
We take out the cotter pin (B) and unscrew the castle nut (A) (the tightening torque of the nut is 200-280 Nm)
Unscrew the mounting bolts (A) of the ball joint of the lower suspension arm to the steering knuckle (tightening torque of the bolts 100-120 Nm)
Disconnect the steering rod end from the steering knuckle. To do this:
- remove the cotter pin and unscrew the crown nut (tightening torque of the nut 24-34 Nm);
- using a puller (09568-4A000), disconnect the ball joint (A) from the steering knuckle (tightening torque of the bolts 100-120 Nm)
Unscrew the mounting screws and remove the brake disc (A) from the wheel hub
Unscrew the bolts and nuts securing the shock strut (tightening torque of nuts and bolts 140-160 Nm)
Remove the wheel hub assembly with the steering knuckle
Check the hub, steering knuckle and all parts for defects
Disassembling the hub
Using special pliers, remove the retaining ring (A)
We press the wheel hub out of the steering knuckle using the 09545-34100 device
We press the inner bearing ring out of the wheel hub using the 09432-11000 device, 09545-34100
Press out the outer bearing ring from the wheel hub using the 09216-21600, 09216-21100 tool
Use suitable mandrels in a garage
Assembly
Apply engine oil to the contact surface of the steering knuckle and wheel bearing
Install the bearing on the steering knuckle fist, using the device 09216-21100
Install the retaining ring on the groove of the steering knuckle
Press the hub onto the steering knuckle, using the device 09454-21100
Apply force to the inner ring of the bearing
Tighten the hub on the fist, using the special device 09517-21500 (tightening torque 200-260 Nm)
Turn the wheel hub on the bearing. Make sure that the hub rotates smoothly and without jamming
Measure the initial moment of resistance to rotation of the bearing, as shown in the figure. The standard value is 1.8 Nm
We measure the runout of the hub using a device and a dial indicator. The maximum permissible runout value is 0.04 mm.