Parking Brake ASSY: Overhaul

1. Remove the 2 bolts and separate the rear disc brake caliper assy LH.

   HINT:

   Do not disconnect the flexible hose from the brake caliper.

1. Release the parking brake, and remove the rear disc.

   HINT:

   • Put matchmarks on the disc and the axle shaft.
   • If the disc cannot be removed easily, turn the shoe adjuster until the wheel turns freely.
     Fig 1: Turning Shoe Adjuster

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard inside diameter: 210 mm (8.27 in.) 

   Maximum inside diameter: 211 mm (8.30 in.) 

   Fig 2: Measuring Inside Diameter Of Disc

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Using a needle-nose pliers, remove the 2 return tension springs.
   Fig 3: Removing Return Tension Springs

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Slide out the front shoe and remove the compression spring.

1. Release the cup claw and remove the front and rear parking brake shoe.
2. Disconnect the parking brake cable from the shoe lever.
3. Remove the tension spring and shoe adjuster screw set from the front and rear shoe.
4. Remove the 2 shoe hold-down springs, 4 cups and 2 pins.
   Fig 4: Releasing Cup Claw

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Using a screwdriver, remove the C-washer.
6. Remove the shim and shoe lever from the parking brake shoe.
   Fig 5: Removing Shim And Shoe Lever From Parking Brake Shoe

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard thickness: 4.0 mm (0.158 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 or uneven wear, replace the brake shoe.

   Fig 6: Measuring Thickness Of Shoe Lining

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Apply chalk to the inside surface of the disc, then grind down the brake shoe lining to fit.

   If the contact between the brake disc and the shoe lining is improper, repair it using a brake shoe grinder or replace the brake shoe assembly.

   Fig 7: Checking Contact Between Brake Disc And Shoe Lining

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Apply the high temperature grease to the shoe attached surface of backing plate (See PARKING BRAKE ASSY  ).

1. Install the shoe lever and the shim to the rear shoe with a new C-washer.
2. Using a feeler gauge, measure the clearance.

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

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

   SHIM THICKNESS SPECIFICATION
   
   

   Shim Thickness	Shim Thickness
   0.3 mm (0.012 in.)	0.6 mm (0.024 in.)
   0.4 mm (0.016 in.)	0.9 mm (0.035 in.)
   0.5 mm (0.020 in.)	-

   Fig 8: Measuring Clearance

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Apply the high temperature grease to the adjusting bolt and piece.
4. Install the shoe adjusting screw set and the tension spring to the front and rear shoe.
5. Install the 2 pins, 4 cups and 2 shoe hold-down springs.
6. Connect the parking brake cable to the shoe lever.
7. Install the front and rear parking brake shoe.
   Fig 9: Identifying Shoe Adjusting Screw Set

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Using a needle nose pliers, install the 2 return tension springs.

   HINT:

   Install front side spring first, rear side spring next.

   Fig 10: Installing Return Tension Springs

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that each part is installed properly.
   NOTE: There should be no oil or grease adhering to the friction surface of the shoe lining and disc.
   Fig 11: Identifying Parking Brake

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Temporarily install the hub nuts.
2. Remove the hole plug, and turn the adjuster and expand the shoes until the disc locks.
3. Contract the shoe adjuster until the disc rotates smoothly.

   Standard: Return 8 notches 

4. Check the shoe has no brake drag.
5. Install the hole plug.
   Fig 12: Turning Brake Adjuster

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Install the rear disc brake caliper with the 2 bolts.

   Torque: 105 N.m (1,071 kgf.cm, 77 ft.lbf) 

Torque: 112 N.m (1,137 kgf.cm, 83 ft.lbf)