Checking Lateral Runout (Brake Disc/Wheel Hub)

Information 

• The required technical values must be taken from the 

  > 4600TW - PSCB TECHNICAL VALUES AND WEAR LIMITS 

  document. 

Brake disc lateral runout 

1. Remove wheel.

   > 440519 - REMOVING AND INSTALLING WHEEL - PORTION ON "REMOVING"

2. > 9510/2 - Adapter plate  must be secured > Adapter plate on wheel hub  .

   > Tightening - torque 160 Nm (118 ftlb.) 

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Adapter plate on wheel hub

   3 Fit the adapter for the > VAS 6079/1 - dial gauge holder for brake discs  at a suitable position on the wheel bearing housing.

   > Dial gauge on brake disc (example) 

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Dial gauge on brake disc (example)

3. Fit dial gauge with slight pretension and measure the lateral runout at the greatest external diameter of the brake disc.

   Information 

   The front face of the wheel hub must not be corroded and must be cleaned if necessary using a polishing cloth.

   Wheel hub lateral runout: 

4. Measure the wheel hub lateral runout at the front face of the wheel hub. Take measurements in each case at the external and internal diameter of the wheel bolt area.
5. Remove brake disc front.

   > 465019 - REMOVING AND INSTALLING FRONT BRAKE DISC - PORTION ON "REMOVING" 

6. Fit the adapter for the > VAS 6079/1 - dial gauge holder for brake discs  at a suitable position on the wheel bearing housing.

   Fit the dial gauge with slight preload and measure the lateral runout on the wheel hub. > Dial gauge on wheel hub (example) 

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Dial gauge on wheel hub (example)

7. Then check the thickness tolerance.