Front Brake Inspection

Brake. Corolla. Zre142 Aze141
Brake (Front). Corolla. Zre142 Aze141

  1. INSPECT BRAKE CYLINDER AND PISTON

  2. INSPECT PAD LINING THICKNESS

  3. INSPECT FRONT DISC BRAKE PAD SUPPORT PLATE

  4. INSPECT DISC THICKNESS

  5. INSPECT DISC RUNOUT

Front Brake -- Inspection



1. INSPECT BRAKE CYLINDER AND PISTON

  1. Check the cylinder bore and piston for rust and scoring. If necessary, replace the disc brake cylinder and piston.



2. INSPECT PAD LINING THICKNESS


    Corolla. Zre142 Aze141.Brake (Front).Front Brake.Front Brake Inspection

  1. Using a ruler, measure the pad lining thickness.

    Standard thickness:
    12.0 mm (0.472 in.)
    Minimum thickness:
    1.0 mm (0.0394 in.)
    If the pad lining thickness is less than the minimum, replace the disc brake pads.
    HINT:
    Be sure to check the wear of the front disc after replacing the brake pads with new ones.


3. INSPECT FRONT DISC BRAKE PAD SUPPORT PLATE

  1. Make sure that the disc brake pad support has sufficient rebound, no deformation, cracks or wear, and that all rust and dirt are cleaned off. If necessary, replace the disc brake pad support plate.



4. INSPECT DISC THICKNESS


    Corolla. Zre142 Aze141.Brake (Front).Front Brake.Front Brake Inspection

  1. Using a micrometer, measure the disc thickness.

    Standard thickness:
    22.0 mm (0.866 in.)
    Minimum thickness:
    19.0 mm (0.748 in.)
    If the disc thickness is less than the minimum, replace the front disc.


5. INSPECT DISC RUNOUT

  1. Inspect the front axle hub bearing looseness and front axle hub runout (COROLLA_ZRE142 RM000001IX204TX.html).



    Corolla. Zre142 Aze141.Brake (Front).Front Brake.Front Brake Inspection

  1. Using SST to hold the disc, tighten the disc with the 5 nuts.

    SST
    09330-00021
    Torque:
    103 N*m{1050 kgf*cm, 76 ft.*lbf}


    Corolla. Zre142 Aze141.Brake (Front).Front Brake.Front Brake Inspection

  1. Using a dial indicator, measure the disc runout 10 mm (0.394 in.) away from the outer edge of the front disc.

    Maximum disc runout:
    0.05 mm (0.00197 in.)
    If the runout exceeds the maximum value, change the installation position of the disc to minimize the runout. If the runout exceeds the maximum even when the installation position is changed, grind the disc. If the disc thickness is less than the minimum, replace the front disc.

  1. Remove the 5 nuts and front disc.