Overhaul

DISASSEMBLY AND REASSEMBLY

DISASSEMBLY SERVICE POINTS
[[A]] FRONT WHEEL HUB ASSEMBLY REMOVAL
1. If the front wheel hub is seized, remove the knuckle together with front wheel hub and fix them with a vise.





2. Use special tools MB990244 (MB990241), MB991354 and MB990211 to pull out the front wheel hub from the knuckle.

INSPECTION
WHEEL BEARING ROTATION STARTING TORQUE AND AXIAL PLAYCHECK

Required Special Tools:
^ MB990998, MB991017: Front Hub Remover and Installer
^ MB990326: Preload Socket
^ MB990685: Torque Wrench





1. Tighten special tools MB991000 (MB990998) and MB991017 to the specified torque.
Tightening torque: 226 ± 19 Nm (167 ± 21 ft. lbs.)
2. Hold the front wheel hub assembly in a vice with a wooden block.
3. Rotate the hub in order to seat the bearing.





4. Measure the wheel bearing rotation starting torque by using special tools MB990326 and MB990685.
Limit: 1.03 Nm (9.12 inch lbs.)
5. If the rotation starting torque is not within the limit range while the nut is tightened to 226 ± 19 Nm (167 ± 21 ft. lbs.), replace the front wheel bearing assembly. If there is any signs of binding or tight spots when the wheel bearing turns, replace it.





6. Measure to determine whether the wheel bearing axial play is within the specified limit or not.
Limit: 0.05 mm (0.002 inch)
7. If the play is not within the limit range while the nut is tightened to 226 ± 19 Nm (167 ± 21 ft. lbs.), replace the front wheel hub assembly.