Front Axle Hub
FRONT AXLE HUB ASSEMBLYREMOVAL AND INSTALLATION
CAUTION
^ The magnetic encoder collects metallic particles easily, because it is magnetized. Make sure that the magnetic encoder should not collect metallic particles. Check that there is not any trouble prior to reassembling it.
^ When removing and installing the front wheel hub assembly, make sure that the magnetic encoder (integrated with the inner oil seal) does not contact with surrounding parts to avoid damage.
^ When removing and installing the front wheel speed sensor, make sure that the sensor head at the end does not contact with surrounding parts to avoid damage.
^ During maintenance, take care not to contact the parts or tools to the caliper because the paint of caliper will be scratched. And if there is brake fluid on the caliper, wipe off quickly.
^ The parts indicated by * are the bolt and nuts with friction coefficient stabilizer. In removal, ensure there is no damage, clean dust and soiling from the bearing and thread surfaces, and tighten them to the specified torque.
Post-installation Operation:
Removal Steps 1-16:
Required Special Tools:
^ MB990242: Puller Shaft
^ MB990244: Puller Bar
^ MB990767: Front Hub and Flange Yoke Holder
^ MB991354: Puller Body
^ MB991897 or MB992011: Ball Joint Remover
REMOVAL SERVICE POINTS
[A] FRONT DRIVESHAFT NUT REMOVAL
CAUTION
Do not apply the vehicle weight on the front wheel hub assembly with the driveshaft nut loosened. Otherwise, the wheel bearing may be broken.
Use special tool MB990767 to counter the hub as shown in the figure to remove the front driveshaft nut.
[B] FRONT CALIPER ASSEMBLY REMOVAL
1. Remove the front caliper assembly with brake hose.
2. Retain the removed front caliper assembly with a wire and the like in a place not to disturb the front hub assembly and knuckle removal.
[C] FRONT BRAKE DISK REMOVAL
If the front brake disk removal is difficult, install bolts (M8 x 1.25) shown in the figure, and tighten them evenly and gradually to remove the front brake disk.
[D] SELF-LOCKING NUT (TIE-ROD END CONNECTION) REMOVAL
CAUTION
^ Loosen the self-locking nut (tie-rod end connection) from the ball joint, but do not remove here. Use the special tool.
^ To prevent the special tool from dropping off, suspend it with a cord.
^ If the dust cover is damaged during operation, replace the tie-rod end.
1. Install special tool MB991897 or MB992011 as shown in the figure.
2. Turn the bolt and knob to make the special tool jaws parallel, then hand-tighten the bolt. After tightening, check that the jaws are still parallel.
NOTE: To adjust the special tool jaws to be parallel, set the orientation of the knob as shown in the figure.
3. Tighten the bolt with a wrench to disconnect the tie rod end.
[E] FRONT HUB ASSEMBLY AND FRONT DRIVESHAFT ASSEMBLY DISCONNECTION
CAUTION
^ The magnetic encoder collects metallic particles easily, because it is magnetized. Make sure that the magnetic encoder does not collect metallic particles.
^ When removing the front driveshaft, make sure that it does not contact with the magnetic encoder (integrated with the inner oil seal) to avoid damage.
If the front driveshaft and front hub are seized, use special tools MB990242 and MB990244, MB991354 and MB990767 to push the front driveshaft assembly out from the front hub.
INSTALLATION SERVICE POINTS
[A] KNUCKLE AND STRUT ASSEMBLY CONNECTION BOLT INSTALLATION
Locate the knuckle and strut assembly upper connection bolt's marking position as shown in the figure and tighten it.
[B] WASHER/FRONT DRIVESHAFT NUT INSTALLATION
CAUTION
^ The magnetic encoder collects metallic particles easily, because it is magnetized. Make sure that the magnetic encoder should not collect metallic particles. Check that there is not any trouble prior to reassembling it.
^ When installing the front driveshaft, make sure that it does not contact with the magnetic encoder (integrated with the inner oil seal) to avoid damage.
^ Do not apply the vehicle weight on the wheel bearing before fully tightening the front driveshaft nut. Otherwise, the wheel bearing may be broken.
1. Be sure to install the front driveshaft washer in the illustrated direction.
2. Using special tool MB990767, tighten the driveshaft nut. At this time, tighten the nut to the specified lower limit torque so that the pin hole may align with cotter pin.
Tightening torque: 144 - 176 Nm (107 - 129 ft-lb)
3. If the pin hole does not align with the pin, tighten the driveshaft nut [less than 176 Nm (129 ft-lb)] and find the nearest hole, then fit the cotter pin.