Front wheel hub (Mitsubishi Space Star)

Contents: Examination ⤓ Installation ⤓ Disassembly ⤓ Examination ⤓ Assembly ⤓

Warnings

On vehicles with ABS, when removing and installing the wheel speed sensor, be careful not to hit the sensor, otherwise it will be damaged.

On vehicles with ABS, when removing and installing the drive shaft, be careful not to hit the ABS sensor rotor located on the BJ constant velocity joint housing, otherwise it will be damaged.

Loosen the front wheel nut. Apply the parking brake, then raise the front of the vehicle and secure it on stands. Remove the affected front wheel.
On a vehicle with ABS Disconnect the connector, unscrew the bolt and remove the wheel speed sensor (Fig. 14.8).

Fig. 14.8. Front wheel hub: 1 - front wheel speed sensor (cars with ABS); 2 - support; 3 - brake disc; 4 - drive shaft mounting nut, 216-255 Nm; 5 - lower arm ball joint; 6 - cotter pin; 7 - ball joint of the steering rod end; 8 - drive shaft; 9 - bolt and nut for fastening the steering knuckle to the front suspension strut, 88 N·m; 10 - steering knuckle and hub

Remove the two bolts securing the caliper to the steering knuckle, lift the caliper up and secure it to the front suspension strut with soft wire.
Remove the two screws and remove the brake disc from the front wheel hub.
Using a special device to hold the hub from turning, unscrew the drive shaft mounting nut (Fig. 14.9).

Fig. 14.9. Unscrewing the nut securing the drive shaft to the front wheel hub

Warning: After loosening the nut securing the drive shaft to the front wheel hub, do not place the vehicle on the wheels, otherwise the hub bearing will be damaged.

Remove the cotter pin and loosen the nut securing the ball joint pin of the tie rod end to the steering knuckle.

Warnings

Do not unscrew the nut securing the ball joint pin of the tie rod end to the steering knuckle. To avoid damaging the threads on the ball joint pin, use the special tool MB991113 or MB990635.

To prevent the special tool MB991113 or MB990635 from falling, secure it to the front suspension stand with a cord.

Install the special tool MB99111Z or MB990635 as shown in Figure 14.10, making sure that the jaws of the tool are parallel. Rotate the bolt of the special tool to push the ball joint pin out of the steering knuckle, then unscrew the nut and remove the ball joint pin from the steering knuckle.

Fig. 14.10. Using a special tool to push the ball joint pin out of the steering knuckle

Loosen the nut, remove the bolt and the lower arm ball joint pin from the steering knuckle.
Using a special tool attached to the hub, press the drive shaft out of the front wheel hub (Fig. 14.11). If you don't have a special tool, use a nylon hammer to knock the drive shaft out of the front wheel hub. If the drive shaft fits tightly in the front wheel hub, spray an impregnating aerosol solvent onto the spline area and then screw the nut back on so that it is flush with the end of the shaft. Hit the nut with a brass hammer to knock the drive shaft out of the hub.

Fig. 14.11. Using a special tool to push the drive shaft out of the front wheel hub

Loosen the nuts and remove the bolts securing the shock absorber strut to the steering knuckle and remove the steering knuckle with the hub from the vehicle.

Examination

Check the hub for cracks and signs of increased wear on the splines.
Check the seal for damage.
Check the steering knuckle for cracks.
Check the hub bearing for damage. If there is play between the steering knuckle and the outer bearing race or the hub and the inner bearing race, replace the bearing or damaged parts.

Installation

Installation is carried out in the reverse order of removal, taking into account the following.
Place a washer under the drive shaft to hub mounting nut as shown in Figure 14.12.

Fig. 14.12. Installation position of the washer under the nut securing the drive shaft to the hub

Use a torque wrench to tighten the drive shaft to hub nut, while using a special tool to hold the hub from turning. Before tightening the drive shaft to hub nut, make sure that the front wheel hub bearing is not loaded with the weight of the vehicle.

Disassembly

Remove the inner seal (Fig. 14 13).

Fig. 14.13. Front wheel hub: 1 - inner seal; 2 - hub; 3 - brake protective cover; 4 - retaining ring; 5 - hub bearing; 6 - outer seal; 7 - steering knuckle

Attach special tools MB 991056 or MB 991355 to the steering knuckle (Fig. 14.14). Insert special tool MB990998 through the hole in the hub and, screwing a nut onto it, remove the hub from the steering knuckle.

Fig. 14.14. Using special tools MB990998 and MB991056 or MB991355 to remove the hub from the steering knuckle

Warning: When removing the hub, replace the hub bearing.

Remove the retaining ring securing the outer bearing race from the steering knuckle.
Remove the outer bearing seal.
To grasp the outer part of the inner bearing ring, use the jaws of a special puller to break the outer seal in two places, as shown in Figure 14.15.

Fig. 14.15. Places of fracture of the outer seal

Using a special puller МВ990810, remove the inner bearing ring (outer part) from the hub (Fig. 14.16). When removing the inner bearing ring, hold the hub to prevent it from falling to the floor

Fig. 14.16. Using a special puller MB990810 to remove the inner bearing ring from the hub.

Install the outer part of the inner ring removed from the hub into the bearing and then remove the bearing using a special puller (Fig. 14.17).

Fig. 14.17. Using a special puller to remove the bearing

Remove the outer oil seal.

Examination

Check the mating surfaces of the hub and brake disc for signs of wear and contamination.
Check the inner surface of the steering knuckle for cracks and signs of wear.

Assembly

Assembly is carried out in the reverse order of removal, taking into account the following.
Install the hub bearing and fill it with universal grease (Fig. 14.18). Apply a thin layer of grease to the mating surfaces of the steering knuckle and hub.

Fig. 14.18. Places of filling the hub bearing with universal consistent grease

Using special tools, press the bearing into the steering knuckle (Fig. 14.19).

Fig. 14.19. Using special tools to press the bearing into the steering knuckle

Caution: Apply pressing force to the outer bearing race.

Install the retaining ring.
Using a special mandrel, install the Oil Seal (from the hub side) into the steering knuckle flush with the end surface of the steering knuckle (Fig. 14.20). Apply universal grease to the working edge of the oil seal and the inner and end surfaces of the oil seal that contact the hub.

Fig. 14.20. Using a special mandrel to install the outer seal

Using special tools, install the hub into the steering knuckle (Fig. 14.21).

Fig. 14.21. Using special tools to install the hub into the steering knuckle

Tighten the special tool nut to a torque of 216-255 N·m.
Rotate the sleeve several times to ensure that all bearing elements are properly installed.
Secure the steering knuckle in a vice, use a torque wrench to turn the nut of the special tool and check the initial torque that must be applied to turn the hub (Fig. 14.22).

Fig. 14.22. Checking the initial torque required to turn the hub

The initial torque that must be applied to turn the hub: no more than 1.8 Nm
Make sure that the initial torque required to turn the hub is as required and that the bearing turns smoothly and without jamming.
Using an arrow-type indicator, measure the axial play of the front wheel hub (Fig. 14.23).

Fig. 14.23. Checking the axial play of the front wheel hub

Axial play of the front wheel hub: no more than 0.05 mm

If, when tightening the nut with a special tool to a torque of 216-255 N·m, the values of the initial torque that must be applied to turn the hub and the axial play of the hub bearing are not within the specified limits, then this is probably the result of improper installation of the bearing, hub and / or improper assembly of these parts with the steering knuckle. In this case, it is necessary to replace the bearing and reassemble the unit.
Install the inner seal. Apply universal grease to the back of the inner seal and use a special tool to install the inner seal into the steering knuckle until it contacts the retaining ring (Fig. 14.24). Apply a layer of grease to the working edge of the seal.