Note. part numbers for this assembly see here
hub assembly (rounded fist) from the inside in the removed state: 1 – a rotary fist; 2 - front hub bearing; 3 - adjusting ring of the speed sensor; 4 - wheel hub
Removing
Attention! In order not to damage the front wheel hub bearing, do not:
- - loosen and tighten the nut of the front wheel hub on the car standing on wheels;
- - lower the car on the wheels with the front wheel drive shaft removed or with the front wheel hub fastening nut loosened.
Place the vehicle on a two-post lift, apply the parking brake and turn off the ignition.
Unlock steering wheel.
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).
Install the stop on the front wheel hub and fix it with two wheel bolts (stop Rou. 604-01, interchangeable head 17, knob).
Unscrew the nut 10, Figure 2-1, fastening the front wheel hub, remove the nut, remove the stop (interchangeable head 30, interchangeable head 17, knob).
Figure 2-1 - Removing the steering knuckle: 1 - telescopic front suspension strut; 2 - nuts of the bolts for fastening the steering knuckle to the front suspension strut; 3 - rotary fist; 4 - front wheel speed sensor; 5 - outer tip of the steering rod; 6 - nut for fastening the tie rod end to the steering knuckle; 7 - a nut of a bolt of fastening of a spherical support to a rotary fist; 8 - ball bearing of the front suspension arm; 9 - front suspension arm; 10 - a nut of fastening of a nave of a forward wheel
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).
Unscrew the nut 7 of the bolt securing the ball joint of the front suspension arm to the steering knuckle and disconnect the knuckle 3 from the lever 9 (ring wrench 16, interchangeable head 16, extension and knob).
Remove the spacer washer from the front suspension arm ball joint.
Unscrew the two nuts 2 bolts securing the steering knuckle to the front suspension strut and remove the bolts (wrench 18, interchangeable head 18, knob).
Press the drive shaft out of the front wheel hub and remove the steering knuckle with the hub assembly (accessories Tav. 1050-04 and Tav. 1420-01).
In the absence of a puller and if it is difficult to remove the drive shaft shank, carefully, without damaging the threads, knock it out of the hub with a hammer through a drift or a wooden block.
Attention! When dismantling the steering knuckle, do not apply force to the wheel drive directed along its axis to the outside of the vehicle, as this may cause the rollers of the three-pin inner joint of the drive to come out of the inner joint housing (or from the grooves of the left semi-axial gear of the JH3 gearbox).
Installation
Attention. The fasteners listed below must be replaced:
- front wheel hub nut (M20x1.5 key 30);
- nut of a bolt of fastening of a spherical support of the lever of a forward suspension bracket;
- nuts of bolts of fastening of a rotary fist to a rack of a forward suspension bracket.
Attention. Install the ball joint bolt of the lower front suspension arm to the steering knuckle with the head towards the front of the vehicle.
Install the front wheel drive shaft spline to the front wheel hub.
Install the steering knuckle on the front suspension strut, insert the mounting bolts and tighten, without tightening, new nuts 2 (wrench 18, interchangeable head 18, ratchet wrench).
Figure 2-2 - Installing the spacer: 1 - slot of the terminal connection of the steering knuckle and ball bearing; 2 - a shoulder of a remote washer; 3 - remote washer; 4 - ball joint of the front suspension arm
Install spacer washer 3 on the ball joint pin 4, Figure 2-2, of the front suspension arm.
Install the ball joint pin of the front suspension arm into the steering knuckle, install the mounting bolt and tighten the new nut. When assembling, the shoulder 2 of the spacer 3 must fall into the slot 1 of the terminal connection on the steering knuckle. Nut tightening torque 62 Nm (6.2 kgf·m) (wrench 16, interchangeable head 16, ratchet wrench, torque wrench).
Tighten the nuts of the bolts securing the steering knuckle to the front suspension strut. Nut tightening torque 105 Nm (10.5 kgf·m) (wrench 18, interchangeable head 18, torque wrench)
Connect the tie rod end to the steering knuckle arm:
- install the front brake disc cover;
- Install the front brake disc.
Install the stop on the front wheel hub and fix it with two wheel bolts (stop Rou. 604-01, interchangeable head 17, knob).
Install a new front wheel hub nut and remove the stop. Nut tightening torque 280 Nm (28.0 kgf·m) (interchangeable head 17, interchangeable head 30, knob, torque wrench).
- install the front wheel speed sensor;
- install the front brake assembly.
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.