Parking Brake Assembly: Inspection

INSPECT BRAKE DISC INSIDE DIAMETER
1. Using a brake drum gauge or an equivalent tool, measure the inside diameter of the disc.
  Standard inside diameter:
  
  190 mm (7.48 in.)
  
  Maximum inside diameter:
  
  191 mm (7.52 in.)
  
  If the inside diameter is more than the maximum, replace the rear disc.
  
  Fig 1: Measuring Inside Diameter Of Disc
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT PARKING BRAKE SHOE LINING THICKNESS
1. Using a ruler, measure the thickness of the parking brake shoe lining.
  Standard thickness:
  
  2.5 mm (0.098 in.)
  
  Minimum thickness:
  
  1.0 mm (0.039 in.)
  
  Fig 2: Measuring Thickness Of Parking Brake Shoe Lining
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the lining thickness is less than the minimum, or if there is severe or uneven wear, replace the parking brake shoe assembly.
  
  NOTE: Always replace both the right and left parking brake shoes together.
INSPECT BRAKE DISC AND PARKING BRAKE SHOE LINING FOR PROPER CONTACT
1. Apply chalk to the inside surface of the disc, then grind down the brake shoe lining to fit the disc. If the contact between the disc and the brake shoe lining is improper, repair it using a brake shoe grinder or replace the parking brake shoe assembly.
  NOTE: Always replace both the right and left parking brake shoes together.
  
  Fig 3: Applying Chalk To Inside Surface Of Disc
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002