Front Axle Hub On-Vehicle Inspection

Suspension & Axle. Lexus Gs430, Gs300. Uzs190 Grs190
Axle. Lexus Gs430, Gs300. Uzs190 Grs190

  1. REMOVE FRONT WHEEL

  2. REMOVE FRONT DISC BRAKE CALIPER ASSEMBLY

  3. REMOVE FRONT DISC

  4. INSPECT FRONT AXLE HUB BEARING LOOSENESS

  5. INSPECT FRONT AXLE HUB RUNOUT

  6. INSTALL FRONT DISC

  7. INSTALL FRONT DISC BRAKE CALIPER ASSEMBLY

  8. INSTALL FRONT WHEEL

Front Axle Hub -- On-Vehicle Inspection



1. REMOVE FRONT WHEEL


2. REMOVE FRONT DISC BRAKE CALIPER ASSEMBLY


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Remove the 2 bolts, and disconnect the brake caliper assembly.

    NOTICE:
    Use a wire or an equivalent to keep the brake caliper from hanging down by the flexible hose.


3. REMOVE FRONT DISC


    Lexus Gs430, Gs300. Uzs190 Grs190.Axle.Axle System.Front Axle Hub  On-Vehicle Inspection
  1. Put matchmarks on the front disc and the axle hub.

  1. Remove the front disc.



4. INSPECT FRONT AXLE HUB BEARING LOOSENESS


    Lexus Gs430, Gs300. Uzs190 Grs190.Axle.Axle System.Front Axle Hub  On-Vehicle Inspection
  1. Using a dial indicator, check for looseness near the center of the axle hub.

    Maximum:
    0.05 mm (0.0020 in.)
    NOTICE:
    Ensure that the dial indicator is set at right angles to the measurement surface.
    If looseness exceeds the maximum, replace the bearing.


5. INSPECT FRONT AXLE HUB RUNOUT


    Lexus Gs430, Gs300. Uzs190 Grs190.Axle.Axle System.Front Axle Hub  On-Vehicle Inspection
  1. Using a dial indicator, check for runout on the surface of the axle hub outside the hub bolt.

    Maximum:
    0.05 mm (0.0020 in.)
    NOTICE:
    Ensure that the dial indicator is set at right angles to the measurement surface.
    If runout exceeds the maximum, replace the axle hub.


6. INSTALL FRONT DISC


    Lexus Gs430, Gs300. Uzs190 Grs190.Axle.Axle System.Front Axle Hub  On-Vehicle Inspection
  1. Align the matchmarks, and install the front disc.

    HINT:
    When replacing the disc with a new one, select the installation position where the front disc has the minimum runout.


7. INSTALL FRONT DISC BRAKE CALIPER ASSEMBLY


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Install the brake caliper assembly to the steering knuckle with the 2 bolts.

    Torque:
    78 N*m{795 kgf*cm, 58 ft.*lbf}
    NOTICE:
    1. Do not twist the front brake hose when installing the front disc brake caliper.
    2. Make sure that there are no foreign objects or damage to the threads of the bolts.
    3. Do not overtighten the bolts because the steering knuckle is made of aluminum and may be damaged.


8. INSTALL FRONT WHEEL
Torque:
103 N*m{1,050 kgf*cm, 76 ft.*lbf}