Replacing Lower Trailing Arm Bearings

WARNING: Mechanical, hydraulic or pneumatic press

Risk of squashing

→ Read specific safety information for the press.

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

WARNING: Wheel bearing housing raised incorrectly

Risk of squashing
Risk of damage to components

→ Wear personal protective gear.

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

Information

The pictures shown in this document may differ from the original .

Fig 1: Identifying Trailing Arm And Bearing
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

The pressure pieces and the hollow plunger-type hydraulic press VAS 6178 are used for removal. Screw a table attachment from assembly tool set T10205 into the hydraulic press. Screw a suitable assembly fixture T10230 onto the threaded rod from assembly tool set T10230/14-16 and assembly tool set T10230/50-54 and position the required attachment when pressing bearings out and in.
Replace bearing -1- .
Bearing -1- consists of the axle bearing -1- and lock -2- .

Fig 2: Identifying Axle Bearing With Lock
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1. 2.1. Check that the cut-outs are aligned → Alignment of bearing 1 .
  
  Fig 3: Identifying Alignment Of Bearing 1
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2. 2.2. Remove lock -1- using extractor T10230/59 .
  
  Fig 4: Removing Lock
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  1. 2.2.1. Fit extractor on the lock -1- .
  2. 2.2.2. Tighten adjusting screw -2- until the extractor is fitted securely.
  3. 2.2.3. Tighten adjusting screw -3- to prevent the tool from tilting.
  4. 2.2.4. Tighten adjusting screw -4- until the lock is loosened completely.
3. 2.3. Press out bearing -1- .
  1. 2.3.1. Use the following pressure pieces and nuts for pressing out bearings:
    
    Fig 5: Identifying Pressure Pieces For Pressing Out Bearing 1
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    - T10230/54 - -1-
    - T10230/55 - -2-
    - T10230/56 - -3-
  2. 2.3.2. Use pressure pieces as follows → Arrangement of tools for pressing out bearing 1 .
    
    Fig 6: Arrangement Of Tools For Pressing Out Bearing 1
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. 2.4. Press in bearing -1- .
  1. 2.4.1. Check alignment of bearing. → Alignment of bearing 1
  2. 2.4.2. Use the following pressure pieces and nuts for pressing in bearings:
    
    Fig 7: Identifying Bearing 1 Pressure Pieces
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    - T10230/54 - -1-
    - T10230/57 (2x) - -2-
  3. 2.4.3. Use pressure pieces as follows → Arrangement of tools for pressing in bearing 2 .
    
    Fig 8: Pressing Bearing 1
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5. 2.5. Fit lock on bearing -1- .
  1. 2.5.1. Check alignment of lock. Lock alignment is identical to that of the bearing. → Alignment of bearing 1
  2. 2.5.2. Use the following pressure pieces and nuts:
    - T10230/54 - -1-
    - T10230/57 (2x) - -2-
  3. 2.5.3. Use pressure pieces as follows → Arrangement of tools for fitting lock on bearing 1 .
    
    Fig 10: Fitting Lock On Bearing 1
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
6. 2.6. Crimp lock to bearing -1- (to ensure that the lock is fitted at the correct position on the bearing).
  1. 2.6.1. Use the following pressure pieces and nuts:
    - T10230/57 - -1-
    - T10230/60 - -2-
    Information
    - Crimping is only possible using the workshop press, not using the hollow plunger-type hydraulic press VAS 6178!
    - Pressure plate VW 401 must be used.
    - Check that the pressure piece and flange tool are aligned. If these are not aligned correctly, this can damage the bearing. As a result, it will no longer be possible to use the bearing!
  2. 2.6.2. Use pressure pieces as follows → Arrangement of tools for crimping bearing 1 .
    
    Fig 12: Arrangement Of Tools For Crimping Bearing 1
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Replace bearing -2- .
1. 3.1. Press out bearing -2- .
  1. 3.1.1. Use the following pressure pieces and nuts for pressing out bearings:
    
    Fig 13: Identifying Pressure Pieces For Pressing Out Bearing 2
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    - T10230/2 - -1-
    - T10230/7 - -2-
    - T10230/5 - -3-
    - T 10230/13 - -4-
    - Washer - -5-
    - Nut - -6-
  2. 3.1.2. Use pressure pieces as follows → Arrangement of tools for pressing out bearing 2 .
    
    Fig 14: Arrangement Of Tools For Pressing Out Bearing 2
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. 3.2. Press in bearing -2- .
  1. 3.2.1. Check installation position of bearing → Installation position of bearing 2 . The slit on the bearing must be positioned opposite the recess.
    
    Fig 15: Identifying Installation Position Of Bearing 2
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  2. 3.2.2. Use the following pressure pieces and nuts for pressing in bearings:
    
    Fig 16: Identifying Pressure Pieces For Pressing In Bearing 2
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    - T10230/2 - -1-
    - T10230/10 - -2-
    - T10230/12 - -3-
    - Washer - -4-
    - Nut - -5-
  3. 3.2.3. Use pressure pieces as follows → Arrangement of tools for pressing in bearing 2 .
    
    Fig 17: Arrangement Of Tools For Pressing In Bearing 2
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Replace bearing -3- .
NOTE: Bearing must always be replaced as there is no guarantee that the bearing can be removed without irreparable damage.
1. 4.1. Carefully remove lock -1- from the bearing -2- using a screwdriver.
  
  Fig 18: Identifying Lock And Bearing
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. 4.2. Mark installation position using a suitable marker/pen -arrow- .
  
  Fig 19: Identifying Installation Position Of Bearing 3
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. 4.3. Press out bearing -3- .
  1. 4.3.1. Use the following pressure pieces and nuts for pressing out bearings:
    
    Fig 20: Identifying Pressure Pieces For Pressing Out Bearing 3
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    - T10230/51 - -1-
    - T10230/15 - -2-
    - T10230/54 - -3-
  2. 4.3.2. Use pressure pieces as follows → Arrangement of tools for pressing out bearing 3 .
    
    Fig 21: Arrangement Of Tools For Pressing Out Bearing 3
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. 4.4. Press in bearing -3- .
  1. 4.4.1. Check marking -arrow- and installation direction -1- . The side of the bearing with the arrow printed on it -1- must be aligned with the inside of the control arm.
    
    Fig 22: Identifying Installation Direction Of Bearing 3
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  2. 4.4.2. Use the following pressure pieces and nuts for pressing in bearings:
    
    Fig 23: Identifying Pressure Pieces For Pressing In Bearing 3
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    - T10230/52 - -1-
    - T10230/51 - -2-
    - T10230/12 - -3-
    - T10230/15 - -4-
  3. 4.4.3. Use pressure pieces as follows → Arrangement of tools for pressing in bearing 3 .
    
    Fig 24: Arrangement Of Tools For Pressing In Bearing 3
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  4. 4.4.4. "Overpress" the bearing slightly (necessary in order to fit the lock). Do not overpress by more than → Control value: 10 mm . → Overpress dimension
    
    Fig 25: Identifying Overpress Dimension
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5. 4.5. Fit lock on bearing -3- (press in as far as possible on the bearing).
  1. 4.5.1. Use the following pressure pieces and nuts:
    
    Fig 26: Identifying Pressure Pieces For Fitting Lock On Bearing 3
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    - T10230/54 - -1-
    - T10230/15 - -2-
    - T10230/12 - -3-
    - T10230/51 - -4-
  2. 4.5.2. Use pressure pieces as follows → Arrangement of tools for fitting lock on bearing 3 .
    
    Fig 27: Arrangement Of Tools For Fitting Lock On Bearing 3
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.