Front Hub

REMOVAL AND INSTALLATION
Removal Service Points
[A]Front Speed Sensor Disconnection





Remove the mounting bolts which hold the speed sensor bracket to the knuckle, and then remove the speed sensor.

CAUTION: Be careful when handling the pole piece at the tip of the speed sensor and the toothed edge of the rotor so as not to damage them by striking against other parts.

[B]Drive Shaft Nut Removal





Loosen the drive shaft nut while the vehicle is on the floor with the brakes applied.

CAUTION: Do not apply vehicle load to the wheel bearing loosing the drive shaft nut. If, however, vehicle load must be applied to the bearing in moving the vehicle, temporarily secure the wheel bearing by using the special tools, M B990998, etc.

[C]Caliper Assembly Removal
Remove the caliper assembly and suspend it with wires.

[D]Lower Arm Ball Joint Disconnection





Using the special tool, disconnect the lower arm ball joint from the knuckle.

CAUTION:
- Be sure to tie the cord of the special tool to the nearby part.
- Loosen the nut but do not remove it.

[E]Tie Rod End Disconnection





Using the special tool, disconnect the tie rod end from the knuckle.

CAUTION:
- Be sure to tie the cord of the special tool to the nearby part.
- Loosen the nut but do not remove it.

[F]Drive Shaft Removal





Use the special tool to push out the drive shaft from the front hub.

[G]Knuckle Removal
In the case of AWD-vehicles with ABS, take care not to damage the rotor for ABS installed to the B.J. outer race when removing the knuckle.

Installation Service Point
]A[Drive Shaft Nut / Cotter Pin Installation
1) Be sure to install the washer and wheel bearing nut in the specified direction.
2) After installing the wheel, lower the vehicle to the ground and finally tighten the wheel bearing nut.

Fig. 3 Washer Installation:

3) If the position of the cotter pin holes does not match, tighten the nut up to 260 Nm (188 ft. lbs.) in maximum.
4) Install the cotter pin in the first matching holes and bend it securely.

INSPECTION
- Check the hub for cracks and spline for wear.
- Check the oil seal for damage.
- Check the knuckle for cracks.
- Check for defective bearing.

NOTE: If the meshing of the wheel bearing outer race and the knuckle, or of the wheel bearing inner race and the hub, is loose, replace the bearing or damaged parts.

Measurement Of Wheel Bearing Starting Torque (Hub Starting Torque) [AWD]
1) Set the special tool to the front wheel hub assembly.





2) Holding the special tool (bolt), tighten its nut to 200 to 260 Nm (145 to 188 ft. lbs.).
3) Turn the front wheel hub assembly to cause grease to distribute evenly over the bearing.





4) Measure the rotation starting torque of the wheel bearing.

Limit: 1.8 Nm (16 inch lbs.) or less

5) The starting torque must be within the limit and, in addition, the bearing must not feel rough when rotated.






DISASSEMBLY AND REASSEMBLY [FWD]
Disassembly Service Points
[A]Hub And Rotor Removal





1) Attach the special tools to the knuckle and front hub.
2) Secure the knuckle in a vise.
3) Tighten the nut of the special tool and remove the hub and rotor from the knuckle.

CAUTION:
- Be sure to use the special tools.
- If the hub and knuckle are disassembled by striking them with a hammer, the bearing will be damaged.

[B]Wheel Bearing Removal





1) Crush the oil seal in two places to that the tabs of the special tool will be caught on the wheel bearing inner race.





2) Remove the wheel bearing inner race from the hub by using the special tool.

CAUTION: Be careful that the hub will not fall down as the wheel bearing inner race (outer side) is removed from the hub.





3) Remove the snap ring from the knuckle.
4) Remove the bearing by using the special tools.

NOTE: Removal is easier if the outer side inner race removed from the hub is placed on the bearing and the wheel bearing is then removed.

Reassembly Service Points
]A[Wheel Bearing Installation
1) Fill the wheel bearing with multipurpose grease.
2) Apply a thin coating of multipurpose grease to the knuckle and bearing contact surfaces.





3) With the wheel bearing inner race removed, press-in the bearing by using the special tools.
4) Install the wheel bearing inner race to the wheel bearing.

]B[Oil Seal (Hub Side) Installation





1) Drive the oil seal (hub side) into the knuckle by using the special tools until it is flush with the knuckle end surface.
2) Apply multipurpose grease to the lip of the oil seal and to the surfaces of the oil seal which contact the hub.

]C[Wheel Bearing Starting Torque Adjustment





1) Use the special tool to mount the hub assembly onto the knuckle.
2) Tighten the nut of the special tool to 200 - 260 Nm (145 - 188 ft. lbs.).
3) Rotate the hub assembly in order to seat the bearing.





4) Measure the wheel bearing starting torque (hub starting torque) by using the special tools.

Limit: 1.8 Nm (16 inch lbs.) or less

NOTE: The starting torque must be within the limit and, in addition, the bearing must not feel rough when rotated.





5) Measure to determine whether the end play of the hub is within the specified limit or not.

Limit: 0.05 mm (0.002 inch)

6) If the starting torque and hub end play are not within the limit range while the nut is tightened to 200 - 260 Nm (145 - 188 ft. lbs.), the bearing, hub and/or knuckle have probably not been installed correctly. Repeat the disassembly and assembly procedure.

]D[Oil Seal (Drive Shaft Side) Installation





Drive the oil seal (drive shaft side) into the knuckle until it contacts the snap ring.
Apply multipurpose grease to the lip of the oil seal.

INSPECTION
- Check the hub and brake disc mounting surfaces for galling and contamination.
- Check the knuckle inner surface for galling and cracks.
- Check for defective bearing.