REMOVAL 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.
  • The parts indicated by * are the 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.
Pre-removal operation
  • Front under cover removal (Refer to GROUP 51, Under Cover Removal and Installation ).
  • Lower arm assembly and Stabilizer bar Connection Removal (Refer to GROUP 33, Stabilizer bar Removal and Installation ). <Vehicle with stabilizer>

 Post-installation operation
  • Using your fingers, press the Ball Joint Dust Cover to check for a crack or damage.
  • Lower arm assembly and Stabilizer bar Connection Installation (Refer to GROUP 33, Stabilizer bar Removal and Installation ). <Vehicle with stabilizer>
  • Front under cover installation (Refer to GROUP 51, Under Cover Removal and Installation ).
  • Check the beam direction of the headlamp (Low beam) (Refer to GROUP 54A - Headlamp Aiming ).




Removal steps
<<A>>
 >>A<<
 1.
 Driveshaft nut


2.
 Front wheel speed sensor (Refer to GROUP 35B - Wheel speed sensor ) <Vehicle with ABS>


3.
 Brake hose clip
<<B>>
4.
 Brake caliper assembly


5.
 Brake disc
<<C>>
6.
 Self-locking nut (tie rod end connection)
<<C>>
7.
 Self-locking nut (lower arm ball joint connection)
<<D>>
8.
 Driveshaft and hub knuckle assembly connection


9.
 Hub and knuckle assembly

REMOVAL SERVICE POINTS

<<A>> DRIVESHAFT NUT REMOVAL
1.The staked portion of the driveshaft nut must face upwards.

2.
caution
  • Make sure that the lock nut chisel is set in the correct direction. Otherwise, the groove or thread in the driveshaft may be broken, or the tip of the chisel may be chipped.
  • Never use a chisel which tip is damaged.
  • For how to use the lock nut chisel, refer to the manufacturer’s operating instructions.
Set the special tool lock nut chisel (MB992700) in the groove of the driveshaft with its "UPPER" mark facing upwards. Then strike the staked portion of the driveshaft nut with the chisel and a hammer to raise up.

3.
caution Be careful not to damage the thread of the driveshaft.
Raise up the staked portion of the driveshaft nut until it does not interfere with the shaft thread.

4.
caution
  • Never use a impact wrench to loosen the driveshaft nut.
  • Do not apply the vehicle weight on the wheel bearing with the driveshaft nut loosened. Otherwise, the wheel bearing may be broken.
Use special tool front hub and flange yoke holder (MB990767) to counter the hub as shown in the figure to remove the driveshaft nut.

<<B>> BRAKE CALIPER ASSEMBLY REMOVAL
1.Remove the brake caliper assembly with brake hose.
2.Secure the removed brake caliper assembly with a wire or other similar material at a position where it will not interfere with the removal and installation of the hub knuckle assembly.

<<C>> SELF-LOCKING NUT (TIE ROD END CONNECTION)/SELF-LOCKING NUT (LOWER ARM BALL JOINT CONNECTION) REMOVAL

1.
caution
  • Do not remove the nut from ball joint. Loosen it and use the special tool to avoid possible damage to ball joint threads.
  • Hang the special tool with cord to prevent it from falling.
Install special tool ball joint remover (MB991897 or MB992011) as shown in the figure.

2.Turn the bolt and knob as necessary to make the jaws of special tool parallel, tighten the bolt by hand and confirm that the jaws are still parallel.
note When adjusting the jaws in parallel, make sure the knob is in the position shown in the figure.
3.Tighten the bolt with a wrench to disconnect the tie rod end, lower arm ball joint.

<<D>> DRIVESHAFT AND HUB KNUCKLE 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 driveshaft, make sure that it does not contact with the magnetic encoder (integrated with the inner oil seal) to avoid damage.

If the driveshaft is seized, use the following special tools to push the driveshaft out from the hub.

  • Front hub & flange yoke holder (MB990767)
  • Axle shaft puller (MB990241)

INSTALLATION SERVICE POINT

>>A<< 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 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 driveshaft nut. Otherwise, the wheel bearing may be broken.
  • Insert the driveshaft so that no hub bolt is vertically above the groove of the driveshaft assembly.
1.Check the hub seated surface for damage or corrosion. Whenever solvent is used for removing the corrosion, the surface should be degreased.
2.Check that the new driveshaft nut can be turned smoothly by hand. Then tighten it until it is seated.

3.4.Using special tool front hub and flange yoke holder (MB990767), tighten the driveshaft nut.
Tightening torque: 270 ± 27 N·m
5.After tightening to the specified torque, check that the nut is seated securely.

6.Use the chisel and a hammer to stake the nut until the centre in the staked portion reaches the shown dimension.
7.Finally, check that the nut is not cracked at its staked portion.