Overview - Wheel Bearing: Notes

Fig 1: Exploded View Of Wheel Bearing Housing And Wheel Bearing Unit

Courtesy of AUDI OF AMERICA, LLC

1. Nut
   • 40 Nm
   • Always replace if removed
2. Upper Front Control Arm
3. Upper Rear Control Arm
4. Bolt
   • Always replace if removed
5. Washer
   • Discontinued with newer versions
6. Wheel Bearing Housing
   • Removing and installing. Refer To WHEEL BEARING HOUSING, REMOVING AND INSTALLING .
   • There are different versions.
   • Distinguishing characteristic. Refer To WHEEL BEARING HOUSING WITH DIFFERENT STEERING ARM THICKNESS 
     WARNING:

     When Exchanging The Wheel Bearing Housing, Make Sure The Length Of The Thread On The Tie Rod End Is Sufficient (There Must Be Approximately 5 Mm Extra Thread). If This Is Not The Case, Then Install A New Tie Rod End With A Longer Thread Pin.

7. Brake Shield
8. Bolt
   • 10 Nm
9. Bolt
   • 200 Nm +180°
   • Replace after each removal. Refer To DRIVE AXLE GENERAL INFORMATION .
   • Before installing, clean the threads in the CV joint with a tap.
10. Wheel Hub
    • The lateral run-out on the outer diameter of the wheel hub when installed can be a maximum of 0.02 mm.
    • Measure the lateral run-out with the Dial Indicator - 0-10 mm:VAS6079  and Dial Indicator Bracket:VAS6079/1 
    • Removing and installing. Refer To WHEEL BEARING UNIT, SERVICING .
11. Wheel Bearing
    • Removing and installing. Refer To WHEEL BEARING UNIT, SERVICING .
      CAUTION:

      • Avoid contaminating with dirt and damaging the seal when setting down/storing. Refer To Fig 2.
12. Bolt
    • Tightening Specification. Refer To -item  ) OVERVIEW - LOWER CONTROL ARM AND BALL JOINT - BOLT.
13. Nut
    • Always replace if removed
    • There are different versions.
    • There are different versions and Tightening Specifications. Refer To NUT VERSIONS FOR THE CONTROL ARM AND GUIDE CONTROL ARM BRACKET 
    • After loosening threaded connection of guide control arm to wheel bearing housing, adhesive residue must be removed on thread of linkage stub.
14. Control Arm
    • There are different versions.
15. Nut
    • Always replace if removed
    • There are different versions.
    • There are different versions and Tightening Specifications. Refer To NUT VERSIONS FOR THE CONTROL ARM AND GUIDE CONTROL ARM BRACKET 
    • After loosening threaded connection on the ball joint to the wheel bearing housing, adhesive residue must be removed on thread of linkage stub.
16. Guide Link
    • There are different versions.
17. Tie Rod End
    • There are different versions.
18. Nut
    • Always replace if removed
    • There are different versions.
    • There are different versions and Tightening Specifications. Refer To NUT VERSIONS FOR THE TIE ROD BALL JOINT BRACKET 
19. Bolt
    • 9 Nm
20. Wheel Speed Sensor
21. Drive Axle
22. Bolt
    • 70 Nm
    • Always replace if removed
23. Cap Screws
    • 80 Nm +90°
    • Always replace if removed

Avoid Contaminating With Dirt And Damaging The Seal When Setting Down/Storing. 

Fig 2: Always Set Wheel Bearing Down On Wheel Hub -2- (Wheel Bearing -1- Facing Up)

Courtesy of AUDI OF AMERICA, LLC

• The wheel bearing -1- must always face up.
• Always set the wheel bearing unit down on the wheel hub -2-.

• Never reach into the inside when lifting the wheel bearing.
  Fig 3: Correct & Incorrect Holding Of Wheel Bearing

  Courtesy of AUDI OF AMERICA, LLC
• Hold the wheel bearing only on the outside.