FRONT BRAKE PAD, BRAKE CALIPER & BRAKE ROTOR (for 3GR-FSE): Inspection

INSPECT BRAKE CYLINDER AND PISTON
1. Check the cylinder bore and piston for rust or scoring.
  If necessary, replace the disc brake cylinder assembly.
INSPECT PAD LINING THICKNESS
1. Using a ruler, measure the pad lining thickness.
  Standard thickness:
  
  12.0 mm(0.472 in.)
  
  Minimum thickness:
  
  1.0 mm (0.039 in.)
  
  Fig 1: Measuring Pad Lining Thickness
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the pad lining thickness is the minimum or less, replace the brake pads.
  
  HINT:
  
  Be sure to check wear of the front disc after replacing the brake pad with a new one.
INSPECT FRONT DISC BRAKE PAD SUPPORT PLATE NO.1
1. Make sure that the pad support plate No.1 has sufficient rebound, has no deformation, cracks or wear, and that all rust and dirt are cleaned off. If necessary, replace the brake pad support plate No.1.
INSPECT FRONT DISC BRAKE PAD SUPPORT PLATE NO.2
1. Make sure that the pad support plate No.2 has sufficient rebound, has no deformation, cracks or wear, and that all rust and dirt are cleaned off. If necessary, replace the brake pad support plate No.2.
INSPECT DISC THICKNESS
1. Using a micrometer, measure the disc thickness.
  Standard thickness:
  
  32.0 mm (1.260 in.)
  
  Minimum thickness :
  
  30.0 mm ( 1.181 in.)
  
  If the disc thickness is less than the minimum, replace the front disc.
  
  Fig 2: Measuring Disc Thickness
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT DISC RUNOUT
1. Temporarily fasten the disc with the hub nuts.
  Torque: 103 N*m (1,050 kgf*cm, 76 ft.*lbf)
2. Using a dial indicator, measure the disc runout 10 mm (0.39 in.) away from the outer edge of the disc.
  Maximum disc runout:
  
  0.05 mm (0.0020 in)
  NOTE:
  - Keep the magnet of the dial indicator away from the axle hub and speed sensor.
  - Install the dial indicator to the shock absorber.
    
    Fig 3: Installing Dial Indicator To Shock Absorber
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. If the runout exceeds the maximum value, change the installation positions of the disc and axle so that the runout will become minimal. If the runout exceeds the maximum even when the installation positions are changed, check the bearing play in the axial direction and the axle hub runout (See INSTALLATION ). If the bearing play and the axle hub runout are normal and if the disc thickness is not within the specified range, shave the disc. If the disc thickness is less than the minimum, replace the disc.
4. Remove the front disc.