Parking Brake Assembly: Inspection

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

CHECK BRAKE DISC INSIDE DIAMETER
1. Using a drum gauge or equivalent, measure the inside diameter of the disc.
  Standard inside diameter: 172 mm (6.77 in.)
  
  Maximum inside diameter: 173 mm (6.81 in.)
  
  If the inside diameter is greater than the maximum, replace the disc.
  
  Fig 1: Measuring Inside Diameter Of Disc Drum
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK PARKING BRAKE SHOE LINING THICKNESS
1. Using a ruler, measure the shoe lining thickness.
  Standard thickness: 3.5 mm (0.138 in.)
  
  Minimum thickness: 1.0 mm (0.039 in.)
  
  If the shoe lining thickness is equal to or less than the minimum, replace the brake shoe assembly.
  
  Fig 2: Measuring Shoe Lining Thickness
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK BRAKE DISC AND PARKING BRAKE SHOE LINING FOR PROPER CONTACT
1. Apply chalk to the inside surface of the disc. Touch the brake shoe to the disc and check that there is full contact between the brake shoe and disc (white chalk is transferred to the entire brake shoe). If the contact is not as specified, use a shoe grinder to repair the brake shoe, or replace the brake shoe assembly.
  
  Fig 3: Checking Brake Shoe To Disc Drum Contact Surface
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002