BR–21 BRAKE SYSTEM – FRONT BRAKE (2JZ–GE) FRONT BRAKE COMPONENTS INSPECTION AND REPAIR 1. MEASURE PAD LINING THICKNESS Using a ruler, measure the pad lining thickness. Standard thickness: 11.0 mm (0.433 in.) Minimum thickness: 1.0 mm (0.039 in.) Replace the pad if the pad's thickness is at the minimum thickness or less, or if the pad has severe, uneven wear. 2. MEASURE DISC THICKNESS Using a micrometer, measure the disc thickness. Standard thickness: 32 mm (1.260 in.) Minimum thickness: 30 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. 3. MEASURE DISC RUNOUT Using a dial indicator, measure the disc runout at a position 10 mm (0.39 in.) from the outside edge. Maximum disc runout: 0.05 mm (0.0020 in.) If the disc's runout is at the maximum value or greater, check the bearing play in the axial direction and check the axle hub runout (See page SA–16). If the bearing play and axle hub runout are not abnormal, adjust the disc runout. 4. IF NECESSARY, ADJUST DISC RUNOUT (a) Remove the 2 bolts and torque plate. (b) Remove the hub nuts and the disc. Reinstall the disc 1/5 of a turn round from its original position on the hub. Install and torque the hub nuts. Torque: 103 N·m (1,050 kgf·cm, 76 ft·lbf) Remeasure the disc runout. Make a note of the runout and disc's position on the hub. (c) Repeat (b) until the disc has been installed on the 3 remaining hub positions. (d) If the minimum runout recorded in (b) and (c) is less than 0.05 mm (0.0020 in.), install the disc in that position. (e) If the minimum runout recorded in (b) and (c) is greater than 0.05 mm (0.0020 in.), replace the disc and repeat step 3. (f) Install the torque plate and torque the 2 bolts. Torque: 118 N·m (1,200 kgf·cm, 87 ft·lbf) R07599 BR6314 BR6315 BR6316