Installing Wheel With Central Bolt

Information 

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Removing/fitting wheels without touching the ground

• When fitting all wheels, the vehicle must never be standing on the ground (make sure the wheels are not touching the ground!). 
• Otherwise, the wheels cannot be fitted correctly because of the weight of the vehicle! 

  Information 

  • Use only Molub Alloy Paste (Part number for 100-gram tube 000.043.305.08) as lubricant for the central wheel lock and wheel hub.

1. Before fitting the wheel, grease the wheel hub with the prescribed lubricant as follows.

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   Greasing wheel hub

   1. 1.1  Grease the outer front area (as far as the red marking -arrow -1  ) with a thin  layer of approx. 10 - 20 mm of Molub Alloy paste.
   2. 1.2  At the front of the inner thread -arrow 2-  , apply a "pea-sized amount"  of Molub Alloy paste.

      Information 

      A circlip holds the cone ring in the central bolt.

2. Before fitting the wheel, always grease the conical surface with a thin  layer of Molub Alloy paste. > Greasing cone ring 

   Make sure that no dirt gets into it! 

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   Greasing cone ring

3. Fit the wheel carefully.
   1. 3.1  Use > VAS 6266A - wheel fitting trolley  on the rear axle to prevent damage to the rim and brake cover plate!
   2. 3.2  On vehicles with PCCB brake discs, use > 9794 - assembly aid  (hub extension! -1-  !

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      Assembly aid (hub extension)

      Information 

      • When tightening the central bolt, make sure that the tool remains fully engaged and does not slide off even slightly (risk of damage to the lockable wheel bolt/locking mechanism).
4. Fit and screw in the central bolt by hand -Arrows-  until it is too difficult to turn by hand.

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   Screwing in central bolt by hand

5. Fit > 9796 - socket wrench  as for removal and press on until it engages with an audible click > Positioning the tool correctly. 

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   Positioning the tool correctly

6. Tighten the central bolt according to the specified tightening procedure using > V.A.G 1601 - torque wrench  and > 9796 - socket wrench  .

   For this purpose, a helper must press the brake pedal forcefully and hold the steering wheel firmly! 

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   Central bolt with socket wrench 9796 and torque wrench V.A.G. 1601

   1. 6.1 Step 1 -1-  : Tighten to an initial tightening torque of > Step 1 600 Nm (444 ftlb.) 

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      Tightening procedure for central bolt (shown as an example)

   2. 6.2 Step 2 -2-  : Loosen central bolt by 90° > Step 2: Loosen central bolt - 90°  .
   3. 6.3 Step 3 -3-  Tighten to a final tightening torque of > Step 3 600 Nm (444 ftlb.) 
      WARNING: Unsecured central bolt 

      • Risk of damage to components 
      • Danger of accidents 
        • After fitting the wheel, make sure that the locking pin is engaged correctly in the central bolt.
7. Pull off > 9796 - socket wrench  and check that the locking pin -1-  has engaged in the central bolt. The locking pin is then flush with the inner toothing chamfer of the central bolt -Arrow  -.

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   Central bolt secured

   1. 7.1  If the locking pin -1-  is still at the rear position > Central bolt unsecured  , the central bolt is unsecured and must be secured manually to prevent it from becoming loose.

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      Central bolt unsecured

   2. 7.2  To do this, screw M8 screw -2-  2 to 3 turns into the locking pin -1-  and move it up and down slightly -Arrows-  until it engages correctly in the central bolt.

      This applies to both road and race track use. 

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      Securing central bolt manually

8. Fit hub cap.

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   Fitting hub cap

   1. 8.1  Lightly grease the rubber ring on the cap if necessary.
   2. 8.2  Align the hub cap so that the positioning lug -1-  is pointing into the recess -2-  of the central bolt.
   3. 8.3  Push the hub cap into its seat until it locks securely in place.