Installing rear wheel bearing housing

→ Wear personal protective gear.

→ Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels).

Information 

• All screws and threaded joints on the axle must be tightened in vehicle position. Vehicle position means: vehicle standing on its wheels or the wheel suspension is raised with a universal vehicle lift. Dimension -1  , from lower edge of wing to center of axle corresponds to vehicle position. The current height values can be found in 

→ 4495TW ADJUSTMENT VALUES FOR SUSPENSION ALIGNMENT .

Pay particular attention to the following points!

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• Screws and nuts are Geomet-coated and must not be greased  .

1. If the wheel bearing housing was replaced, perform the following tasks: 
   1. 1.1. Clamp the wheel bearing housing in a vice with aluminum protective jaws.
   2. 1.2. Insert wheel bearing unit into the wheel bearing housing and tighten fastening screws.
      Fig 1: Wheel Bearing Unit Screws Tightening Sequence

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      1. 1.2.1. Always observe the specified tightening sequence -1 - 4-  !

         Observe specified tightening torques:

         Wheel bearing unit to wheel bearing housing: Initial tightening 80 Nm (59 ft. lb.) Final tightening +90° 

      Information 

      • Grease the part of the speed sensor located in the wheel bearing housing.  .
      • The bore for mounting the speed sensor must be free of dirt  .
      • Observe specified tightening torques  .
   3. 1.3. Insert speed sensor -2-  and tighten fastening screw -1-. Tightening torque 8 Nm (6 ft. lb.) 

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   4. 1.4. Position cover plate for brake disc -2-  and tighten fastening screws -1-. Tightening torque 10 Nm (7.5 ft. lb.) 

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2. Installation is performed in reverse order.

   Observe specified tightening torques:

   Information 

   Tighten the threaded joint on the wheel bearing housing only at the fastening screw -1-.  Counter at the nut -3-  while doing so.

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   Lower trailing arm to wheel bearing housing: Initial tightening 120 Nm (89 ft. lb.) Final tightening +360° 

   Shock absorber to wheel bearing housing: Initial tightening 150 Nm (111 ft. lb.) Final tightening +180° 

   Tie rod to wheel bearing housing: Initial tightening 90 Nm (67 ft. lb.) Final tightening +90° 

   Upper control arm to wheel bearing housing: Tightening torque 95 Nm (70 ft. lb.) 

   Drive shaft to wheel hub (Step 1: Wheels suspended in mid-air, operate brake while tightening): Initial tightening 200 Nm (148 ft. lb.) 

   Drive shaft to wheel hub (Step 2: Wheels on the ground): Final tightening 180°