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Home >> Porsche >> 2021 >> 911 Targa 4 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 57 (46 Brakes - Brake Mechanism 3.8L (Eng Code MDK.E) -- 992 - 911 CARRERA (992)) >> WM, 465004 Measuring Front Brake Disc >> Measuring Front Brake Disc >> Measuring Front Brake Disc - Lateral Runout (Wheel Hub)

Measuring Front Brake Disc - Lateral Runout (Wheel Hub)

WARNING: This page is about a different variant/trim than selected.

Information 

The front face of the wheel hub must not be corroded.

The front face of the wheel hub must be cleaned using a fine emery cloth if necessary.

  1. Measure lateral runout of the wheel hub.
    1. 1.1 > 9510/1 - Adapter plate-2-  must be fitted on the wheel hub. Then, screw in and tighten wheel bolts.
    2. 1.2 Secure dial gauge -1-  with ball joint arm from > Nr.147-1 - dial gauge set with ball joint arm  at a suitable position on the wheel suspension.
    3. 1.3 Adjust dial gauge -1-  from > Nr.147-1 - dial gauge set with ball joint arm  so that the dial gauge -1-  is touching the outer edge of the wheel hub with slight preload.
    4. 1.4 Set dial gauge -1-  from > Nr.147-1 - dial gauge set with ball joint arm  to zero, turn the wheel hub at the > 9510/1 - adapter plate-2-  slowly by one full turn and check the deflection of the dial gauge -1-  .
    G15522431Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Dial gauge on wheel hub

  2. Only for vehicles with central wheel bolts:

    Measure lateral runout of the wheel hub.

    1. 2.1 > 9510/1 - Adapter plate-2-  must be fitted on the wheel hub.
    2. 2.2 Position wheel driver pins -3-  .
    3. 2.3 Screw in and tighten screws for wheel driver pins -4-  .

      > Tightening torque 14 Nm (10.5 ftlb.) 

    4. 2.4 Secure dial gauge -1-  with ball joint arm from > Nr.147-1 - dial gauge set with ball joint arm  at a suitable position on the wheel suspension.
    5. 2.5 Adjust dial gauge -1-  from > Nr.147-1 - dial gauge set with ball joint arm  so that the dial gauge -1-  is touching the outer edge of the wheel hub with slight preload.
    6. 2.6 Set dial gauge -1-  from > Nr.147-1 - dial gauge set with ball joint arm  to zero, turn the wheel hub at the > 9510/1 - adapter plate-2-  slowly by one full turn and check the deflection of the dial gauge -1-  .
    G15522432Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Dial gauge on rear wheel hub (PCCB)

  3. If the lateral runout of the wheel hub is not within the tolerance range:

    Replace wheel hub.

    405755 REPLACING FRONT WHEEL BEARING

    Maximum lateral runout of the wheel hub: > Dimension 0.03 mm 

  4. Only  if the lateral runout of the brake disc is outside of the tolerance range, but the lateral runout of the wheel hub is within the tolerance range:

    Replace front brake disc.

    > WM, 461619 REMOVING AND INSTALLING BRAKE DISC AIR GUIDE (FRONT) 

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