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REMOVAL AND INSTALLATION
caution
  • 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.
  • 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 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
  • Engine room under cover front removal (Refer to GROUP 51 - Under Cover ).
  • Lower arm assembly and stabilizer bar connection removal (Refer to GROUP 33 - Stabilizer Bar ).
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 ).
  • Engine room under cover front installation (Refer to GROUP 51 - Under Cover ).
  • Check the beam direction of the headlight (Low beam) (Refer to GROUP 54A - Headlight, On-vehicle Service, Headlight Aiming ).
Removal steps
<<A>>>>B<<1.Driveshaft nut
2.Front wheel speed sensor (Refer to GROUP 35C - Wheel Speed Sensor )
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>>>>A<<8.Driveshaft and hub knuckle assembly connection
9.Hub and knuckle assembly
Required Special Tools:
 
 
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 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.
cautionBe 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 the special tool 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 the special tool 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.
noteWhen 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 the special tools to push the driveshaft out from the hub.
  • MB990767: Front hub & flange yoke holder
  • MB990241: Axle shaft puller
 
 
 
 
INSTALLATION SERVICE POINTS
 
 
>>A<< DRIVESHAFT AND HUB KNUCKLE ASSEMBLY CONNECTION
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.
  • Insert the driveshaft so that no hub bolt is vertically above the groove of the driveshaft assembly.
Apply the grease as shown and then insert the driveshaft assembly into the front hub.
Specified grease:
Shell Gadus S2 V220AD 2, Shell Alvania Grease HDX or Dowcorning/Molykote BR2 Plus
Amount to use: As required [1.0 - 1.5 g (0.04 - 0.05 oz)]
 

 
 
>>B<< DRIVESHAFT NUT INSTALLATION
cautionDo not apply the vehicle weight on the wheel bearing before fully tightening the driveshaft nut. Otherwise, the wheel bearing may be broken.
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. Using the special tool MB990767, tighten the driveshaft nut.
Tightening torque: 270 ± 27 N·m (199 ± 20 ft-lb)
4. After tightening to the specified torque, check that the nut is seated securely.
5. Use the chisel and a hammer to stake the nut until the center in the staked portion reaches the shown dimension.
6. Finally, check that the nut is not cracked at its staked portion.