Removal and Installation

REMOVAL AND INSTALLATION

CAUTION:
^ For vehicles with ABS, be careful when handling the projection at the tip of the speed sensor so as not to damage it by striking against other parts.
^ The front hub assembly should not be disassembled. When removing the front hub assembly, the wheel bearing inner race may be left at the spindle side. In this case, always replace the front hub assembly, otherwise the hub will damage the oil seal, causing oil leaks or excessive play.

REMOVAL SERVICE POINTS
[[A]] CALIPER ASSEMBLY REMOVAL
Secure the removed caliper assembly with wire, etc.

[[B]] DRIVESHAFT NUT REMOVAL

CAUTION: Do not apply pressure to wheel bearing by the vehicle weight to avoid possible damage when driveshaft nut is loosened.





Use special tool MB990787 to fix the hub and remove the driveshaft nut.

[[C]] TIE ROD END/LOWER ARM ASSEMBLY DISCONNECTION

CAUTION:
^ Do not remove the nut from ball joint. Loosen it and use special tool MB991897 to avoid possible damage to ball joint threads.
^ Hang special tool MB991897 with rope or wire to prevent them from falling.





1. Install the special tool MB991897 as shown in the figure.





2. Turn the bolt and knob as necessary to make the jaws of special tool MB991897 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.

INSTALLATION SERVICE POINT
]]A[[ DRIVE SHAFT NUT INSTALLATION

CAUTION: Do not apply pressure to wheel bearing by the vehicle weight to avoid possible damage before securely tightening the driveshaft nut.

1. Face the flat side of a washer to a driveshaft nut to install.
2. Use special tool MB990767 to fix the hub and tighten the driveshaft nut.





3. If the position of the cotter pin holes does not match, tighten the nut up to 255 Nm (188 ft. lbs.) maximum.
4. Install the cotter pin in the first matching holes and bend it securely.

INSPECTION
WHEEL BEARING BREAKAWAY TORQUE CHECK





1. Install the special tools MB990998 and MB990326 to the front hub assembly and tighten the nut to the specified torque.
Tightening torque: 226 ± 29 Nm (167 ± 21 ft. lbs.)
2. Measure the wheel bearing breakaway torque with special tool MB990326.
Limit: 1.0 Nm (9 inch lbs.) or less
3. Wheel bearing breakaway torque must be under the limit value and there should be no roughness when rotating the hub.

WHEEL BEARING END PLAY CHECK





1. Install the special tool MB990998 to the front hub assembly and tighten the nut to the specified torque.
Tightening torque: 226 ± 29 Nm (167 ± 21 ft. lbs.)
2. Measure the play in the hub axial direction.
Limit: 0.05 mm (0.002 inch)
3. If the play exceeds the limit, replace the front hub assembly.