Parking Brake: Inspection

Inspect the disassembled parts for wear, rust or damage.

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

1. Standard thickness: 4.0 mm (0.157 in.) 
2. 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 Of Shoe Lining

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

1. Standard inside diameter: 230 mm (9.06 in.) 
2. Maximum inside diameter: 231 mm (9.09 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 is worn unevenly.

Fig 2: Measuring Inside Diameter Of Disc Using Brake Drum Gauge

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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.

Fig 3: Inspecting Parking Brake Lining & Disc For Proper Contact

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Using a feeler gauge, measure the clearance.

Standard clearance: Less than 0.25 mm (0.0098 in.) 

Fig 4: Measuring Clearance Between Parking Brake Shoe & Lever Using Feeler Gauge

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

1. Using a screwdriver, remove the C-washer.
   Fig 5: Removing C-Washer

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the parking brake shoe lever and shim, and install the correct sized shim.
3. Install the parking brake shoe lever with a new C-washer.
   Fig 6: Installing Parking Brake Shoe Lever With C-Washer

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Remeasure the clearance.