The wheel speed detection 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 for wheel speed detection (integrated with the inner oil seal) does not contact with surrounding parts to avoid damage.
The parts indicated by * are the nuts with friction coefficient stabilizer. Prior to reinstallation, 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
Using Your Fingers, press the Ball Joint Dust Cover to Check for a Crack or Damage.
Removal steps
<<A>>
>>B<<
1.
Driveshaft nut
2.
Front wheel speed sensor
3.
Brake hose bracket
<<B>>
4.
Caliper assembly
5.
Brake disc
<<C>>
>>A<<
6.
Stabilizer link connection
7.
Nut (lower arm ball joint connection)
<<D>>
8.
Self-locking nut (tie-rod end connection)
<<E>>
9.
Driveshaft and hub knuckle connection
10.
Hub knuckle assembly and strut mounting bolt and nuts
11.
Hub knuckle assembly
Required Special Tools:
MB990767: Front Hub and Flange Yoke Holder
MB991897 or MB992011: Ball Joint Remover
MB992700: Lock Nut Chisel
MB990242: Puller Shaft
MB990244: Puller Ball
MB991354: Puller Body
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>> CALIPER ASSEMBLY REMOVAL
1. Remove the caliper assembly with brake hose.
2. Secure the removed 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>> STABILIZER LINK DISCONNECTION
Use a hexagon wrench to counterhold the stabilizer link as shown. Then use a wrench to remove the nut securing the stabilizer link to the strut.
<<D>> SELF-LOCKING NUT (TIE-ROD END 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 too ball joint remover (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. Unscrew the bolt to disconnect the ball joint.
<<E>> DRIVESHAFT AND HUB KNUCKLE DISCONNECTION
caution
The wheel speed detection 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 wheel speed detection 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:
Puller shaft (MB990242)
Puller bar (MB990244)
Front hub and flange yoke holder (MB990767)
Puller body (MB991354)
INSTALLATION SERVICE POINTS
>>A<< STABILIZER LINK CONNECTION
Use a hexagon wrench to counterhold the stabilizer link as shown. Then use a wrench to install the nut securing the stabilizer link to the strut.
>>B<< 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. Apply the grease as shown and then insert the drive shaft assembly into the front hub.
Specified grease: Shell Alvania Grease HDX
Amount to use: As required [About 1.0 - 1.5 g (0.04 - 0.05 oz)]
3. Check that the new driveshaft nut can be turned smoothly by hand. Then tighten it until it is seated.
4.
5. Using special tool front hub and flange yoke holder (MB990767), tighten the driveshaft nut.
Tightening torque: 250 ± 25 N·m (184 ± 18 ft-lb)
6. After tightening to the specified torque, check that the nut is seated securely.
7. Use the chisel and a hammer to stake the nut until the center in the staked portion reaches the shown dimension.
8. Finally, check that the nut is not cracked at its staked portion.
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