Front Axle

INSPECTION

WHEEL BEARING ROTATION STARTING TORQUE AND END PLAY CHECK

Required Special Tools:
^ MB990998: Front Hub Remover and Installer
^ MB991000: Spacer
^ MB990326: Preload Socket
^ MB990685: Torque Wrench





1. Install special tools MB991000, MB990998 and tighten them to the specified torque.
Tightening torque: 196 - 255 N-m (145 - 188 ft-lb)
2. Hold front wheel hub assembly in a vice, using wooden blocks.
3. Rotate the hub in order to seat the bearing.





4. Measure the wheel bearing rotation starting torque by using the special tools MB990326 and MB990685.
Limit: 1.4 N-m (12 in-lb)
5. If the rotation starting torque is not within the limit when the nut is tightened to 196 - 255 N-m (145 - 188 ft-lb), 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 end play is within the specified limit or not.
Limit: 0.05 mm (0.002 inch)
7. If the play exceeds the limit when the nut is tightened to 196 - 255 N-m (145 - 188 ft-lb), replace the front wheel hub assembly.