Installing Wheel Bearing Housing: Notes

Information 

If the wheel bearing housing is to be replaced, disassemble the old wheel bearing housing and remove the reusable parts (speed sensor, lid for wheel bearing with fastening screws, wheel hub and tension bolt). → 405719 REMOVING AND INSTALLING FRONT WHEEL BEARING .

The wheel bearing cannot be reused.

Press new wheel bearing into new (heated) wheel bearing housing and complete the wheel bearing housing

→ 405719 REMOVING AND INSTALLING FRONT WHEEL BEARING .

• Before installing, do a visual check on the parts.
• Use new lock nuts and brake calliper fastening screws.
• Observe correct tightening torques → 4001TW TIGHTENING TORQUES FOR FRONT AXLE .
• Tie-rod end taper must be free of grease.
• Counter with a screwdriver 9546  when tightening the lock nut on the toe control arm.

1. Fit trailing arm (ball joint) on wheel carrier (wheel bearing housing). Tighten new lock nut for trailing arm (ball joint) to 75 Nm (56 ftlb.) using the socket-wrench insert and pivoting extension.
   Fig 1: Fitting Trailing Arm

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2. Insert spring strut as far as it will go into the wheel carrier. Tighten the new lock nuts (for screw and suspension/stabilizer) -arrows-  to the prescribed tightening torque → 4001TW TIGHTENING TORQUES FOR FRONT AXLE .

   Install brake disc and brake cover plate.

   Fig 2: Locating Spring Strut/Wheel Carrier/Trailing Arm Bolts

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3. Place the spring-strut/wheel-carrier assembly into the vehicle. Get another person to help you with this.
   • Note the installation position of the spring-strut supporting mount.
   • -A-  = vehicle outer side/-B-  = vehicle inner side.
   • The damper piston rod is thereby shifted outwards.
   • The three unused bores in the spring-strut supporting mount are intended only for driving on racing circuits. The three fastening bolts (M8) are fitted in these holes in this case. This increases negative camber.
     1. Vehicle outer side
     2. Vehicle inner side
        Fig 3: Identifying Spring-Strut Supporting Mount

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4. Align spring-strut supporting mount according to the relevant marking (position of the three collar nuts). Tighten the new lock nuts -arrows-  to the specified torque at this position.
   Fig 4: Locating Spring-Strut Supporting Mount

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5. Fit the trailing arm fastening screw -4-  . Tighten in vehicle position only! Vehicle position means: vehicle standing on the wheels or wheel suspension is raised to the relevant height with a universal lift.

   Fit tie-rod end on wheel carrier -2-  , diagonal arm on trailing arm (at correct position) -3-  and then fit control arm spoiler -1-  .

   Observe installation position of control arm mount on the diagonal arm -3-  . The diagonal arm must be fitted on the center bore of the trailing arm (observe the following diagrams).

   Fig 5: Identifying Trailing Arm Components

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