Parking Brake: Inspection

Inspect the disassembled parts for wear, rust or damage.

Using a ruler, measure the thickness of the shoe lining.

Standard thickness: 2.5 mm (0.098 in.) 

Minimum thickness: 1.0 mm (0.039 in.) 

If the lining thickness is at the minimum thickness or less, or if there is severe and uneven wear, replace the brake shoe. 

Fig 1: Measuring Thickness Shoe Lining

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a brake drum gauge or equivalent, measure the inside diameter of the disc.

Standard inside diameter: 190 mm (7.48 in.) 

Maximum inside diameter: 191 mm (7.52 in.) 

Replace the disc if the inside diameter is at the maximum value or more.

Replace the disc or grind it with a lathe if the disc is scored or worn unevenly.

Fig 2: Measuring Inside Diameter Of Disc

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Apply chalk to the inside surface of the disc, then grind down the brake shoe lining to fit. If the contact between the disc and the brake shoe lining is improper, repair it using a brake shoe grinder or replace the brake shoe assembly.

Using a feeler gauge, measure the clearance.

Standard clearance: Less than 0.35 mm (0.0138 in.) 

If the clearance is not within the specification, replace the shim with one of the correct size.

Fig 3: Measuring Clearance Between Parking Brake Shoe And Lever

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Using a screwdriver, remove the C-washer and shim.
2. Install the correct size shim.
3. Install a new C-washer.
4. Remeasure the clearance.
   Fig 4: Replacing Shim

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002