Removing Wheel With Central Bolt

→ Do not tilt wheel during removal/fitting from/on the wheel hub.

1. Raise the vehicle only at the jacking points provided. → 4X00IN LIFTING THE VEHICLE . Alternatively, raise the vehicle (handbrake on) until the wheel you want to work on is up off the ground.

   Information 

   • A special tool for removing the crested hub cap can be obtained by quoting part number 991.361.079.00. This can also be used with the previous version (997). 
   • Alternatively: An auxiliary tool can be found in the serrated tool (in the luggage compartment). Pull this out of the square and put it back there again when you are finished. 
2. Carefully lever the crested hub cap out using the special tool.

   Insert its metal tab -1- into the opening groove on the central bolt and then swivel back the handle -arrow-. 

   Fig 1: Removing Crested Hub Cap

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Information 

   • The lockable wheel bolt is only released when special tool 9796 is fitted as far as it will go onto the wheel bolt (safety lock on the central bolt is pushed back). 
   • The socket locks at this position. 
   • Get a second person to press the brake pedal to prevent the wheel from turning. 
   • When loosening 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). 
   • A very high torque is required in order to loosen the central bolt. Always turn in the correct direction (anticlockwise to open the central bolt). 
3. Socket wrench 9796  (socket) must be fitted and pushed on as far as it will go. 

   This opens (unlocks) the lockable wheel bolt.

   If the lockable wheel bolt (locking mechanism) is difficult to move in axial direction (becomes tilted in the wheel bolt toothing/socket cannot be fitted), loosen the locking mechanism using a suitable mandrel (press towards the wheel hub).

   To ensure that the socket can then be pulled off the wheel bolt (using an acceptable amount of force), grease the O-ring on the release plunger.

   Fig 2: Positioning Tool (9796)

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Unscrew the wheel bolt you released using special tool socket wrench 9796  . Get a second person to press the brake pedal to prevent the wheel from turning.

   When loosening the central bolt, make sure that the tool remains fully engaged and does not slide off even slightly.

   Fig 3: Opening Wheel Central Bolt

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
5. Unscrew the central bolt and set it down in such a way that the conical area or trapezoidal thread cannot get dirty.
   Fig 4: Removing Wheel Central Bolt

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
6. On vehicles with PCCB brake discs, screw the assembly aid 9794  (hub extension) -1-  into the wheel hub before taking off the wheel. The lockable wheel bolt (locking mechanism) must first be removed.

   This prevents damage to the brake disc when taking off the wheel.

   Fig 5: Identifying Hub Extension

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
7. Carefully take off the wheel.

   To do this, particularly for 911 Turbo models (991), use wheel fitting trolley WE 1300  on the rear axle to prevent damage to the rim and brake cover plate!

8. On 911 Turbo models (991): Check rim and rear brake cover plate.
   1. 8.1. Check inner part of rim for damage through the brake cover plate.
   2. 8.2. Check that the balancing weights are fitted and secured correctly.
   3. 8.3. Check brake cover plate for damage (kinks, dents, distortion, distance to brake disc).