Front Brake Caliper: Inspection

Using a ruler, measure the pad lining thickness.

1. Standard thickness: 11.5 mm (0.453 in.) 
2. Minimum thickness: 1.0 mm (0.039 in.) 

Replace the pad if the pad's thickness is at the minimum or if it shows signs of uneven wear.

Fig 1: Measuring Pad Lining Thickness Using Ruler

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a micrometer, measure the disc thickness.

1. Standard thickness: 32.0 mm (1.260 in.) 
2. Minimum thickness: 30.0 mm (1.181 in.) 

Replace the disc if the thickness of the disc is at the minimum thickness or less. Replace the disc or grind it on a lathe if it is scored or is worn unevenly.

Fig 2: Measuring Disc Thickness Using Micrometer

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a dial indicator, measure the disc runout at a position 10 mm (0.39 in.) from the out side edge.

Maximum disc runout: 0.07 mm (0.0028 in.) 

If the bearing play and axle hub runout are not abnormal, replace the disc or grind it on an "On-Car brake lathe".

HINT:

Before measuring the runout, confirm that the front bearing preload is within the specification (See INSTALLATION ).

Fig 3: Measuring Disc Runout At Position Using Dial Indicator

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the front axle hub (See REMOVAL ).
2. Remove the disc from the axle hub (See DISASSEMBLY ).
3. Install a new disc and torque the 5 bolts.

   Torque: 74 N.m (750 kgf.cm, 54 ft.lbf) 

4. Install the axle hub and adjust the front bearing preload (See INSTALLATION ).