Installing Front Wheel Bearing

→ Read specific safety information for the press.

→ Check that the press is working perfectly before use, particularly the safety components.

Information 

• The wheel bearing has a magnetised multipole seal, which acts as a pulse sender for the wheel speed sensor  .
• The multiple-pole seal -1- must always face upwards when the wheel bearing is set down (this does not apply when pressing the wheel hub into the wheel bearing). Do not damage the multipole seal and do not come into contact with magnetic objects (e.g. magnetised screwdriver, magnet)  .
  Fig 1: Identifying Wheel Bearing Unit

  Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Press the wheel hub into the wheel bearing.
   1. Press tool
   2. Pressure plate VW 402 
   3. Wheel hub
   4. Wheel bearing
   5. Pressure plate VW 401 
      Fig 2: Pressing Wheel Hub Into Wheel Bearing

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
      1. 1.1. Fit special tools as shown in the illustration → Pressing wheel hub into wheel bearing  .
      2. 1.2. Press the wheel hub into the wheel bearing.
2. Insert the tension bolt -2-  in the wheel bearing -4-  with the wheel hub -3-  and tighten the new hexagon nut -1-  hand-tight.
   Fig 3: Identifying Tension Bolt, Wheel Bearing And Bolt

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Install the wheel bearing in the wheel bearing housing.
   1. 3.1. Insert the wheel bearing in the wheel bearing housing.
      WARNING: Incorrect handling of safety bolts

      • Danger of injury
      • Loss of torque

      → Always use new fastening screws and nuts following removal.

      → Observe specified tightening torques.

      → Carry out a visual inspection of all re-used parts.

   2. 3.2. Tighten fastening screws in the sequence -1, 2, 3, 4-  .

      Step 1: Tightening torque 80 Nm (59 ftlb.) 

      Step 2: Torque angle 120 Grad 

      Fig 4: Identifying Wheel Bearing Fastening Screws

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   3. 3.3. Tighten fastening screw -3-  securing holder -2-  to wheel bearing housing. Tightening torque 10 Nm (7.5 ftlb.) 
   4. 3.4. Clip electric line -1-  onto the holder.
      Fig 5: Identifying Electric Line Holder With Fastening Screws

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.