Overhaul

DISASSEMBLY AND ASSEMBLY

Disassembly Steps 1-5 / Assembly Steps 1-5:

DISASSEMBLY SERVICE POINTS

[[A]] HUB REMOVAL

CAUTION
In the hub removal operation, make sure to replace the wheel bearing with new one.





Use special tools MB991017, MB991056 or MB991355, MB991000 to pull out the hub from the knuckle.

[[B]] WHEEL BEARING REMOVAL





1. Use special tools MD998801 and MB991000 to remove the wheel bearing inner race (outside) from the hub.





2. Use special tools MB992150, MD998812 and MD998813 to assemble the inner race (outside) removed from the hub to the wheel bearing.





3. Use special tools MB990935 and MB990938 to remove the wheel bearing.

ASSEMBLY SERVICE POINTS

]]A[[ WHEEL BEARING INSTALLATION

CAUTION

^ The magnetic encoder for wheel speed sensor is installed in the wheel bearing. Install the wheel bearing so that the encoder is positioned in the direction shown in the figure.
^ When press-fit the wheel bearing, push the outer race.





Use special tools MB990890 and MD999528 to press-fit the wheel bearing.

]]B[[ DUST SHIELD INSTALLATION





Use special tools MB991388 and MB991576 to press-fit the knuckle into the dust shield.

NOTE: Use the bolts (M12) to align the caliper mounting holes.

]]C[[ HUB ROTATION STARTING TORQUE CHECK





1. Set special tools MB991000, MB991017 and MB991099 as shown in the figure, tighten the nut to the specified torque, and press-fit the hub into the knuckle.

Tightening torque: 144-176 Nm (107-129 ft-lb)

2. Rotate the hub to make the bearing well-greased.





3. Use Special tool MB990326 to measure the hub rotation starting torque.

Limit: 1.8 Nm (16 in-lb)

4. Hub rotation starting torque should be within the limit value, and there should be no roughness and gritty feeling in rotation.

]]D[[ WHEEL BEARING END PLAY CHECK





1. Use special tools MB991000 and MB991017 to measure to determine whether the wheel bearing end play is within the specified limit or not.

Limit: 0.05 mm(0.002 inch)

2. If the end play is not within the limit range while the nut is tightened to the specified torque, the bearing, hub and/or knuckle have probably not been installed correctly. Replace the bearing and re-install.

Tightening torque: 144-176 Nm (107-129 ft-lb)

INSPECTION
^ Check the front hub and brake disc mounting surfaces for galling and contamination.
^ Check the knuckle inner surface for galling and cracks.