Parking Brake ASSY: Overhaul

HINT:

• See COMPONENTS 
• Overhaul the RH side by the same procedures with LH side.

1. REMOVE REAR WHEEL 
2. SEPARATE REAR DISC BRAKE CALIPER ASSY LH 
   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.

3. REMOVE REAR DISC 
   1. Release the parking brake, and remove the rear disc.

   HINT:

   • Put matchmarks on the disc and the axle hub.
   • If the disc cannot be removed easily, turn the shoe adjuster until the wheel turns freely.
   Fig 1: Removing Rear Disc

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. INSPECT BRAKE DISC INSIDE DIAMETER 
   1. Using a brake drum gauge or equivalent, measure the inside diameter of the disc.

      Standard inside diameter: 170 mm (6.69 in.) 

      Maximum inside diameter: 171 mm (6.73 in.) 

   Fig 2: Measuring Inside Diameter Of Disc

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. REMOVE PARKING BRAKE SHOE RETURN TENSION SPRING 
   1. Using a needle-nose pliers, remove the 2 return tension springs.
   Fig 3: Removing Return Tension Springs

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. REMOVE PARKING BRAKE SHOE STRUT COMPRESSION SPRING 
   1. Slide out the front shoe and remove the compression spring.
7. REMOVE PARKING BRAKE SHOE STRUT LH 
8. REMOVE PARKING BRAKE SHOE 
   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: Removing Parking Brake Shoe

      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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. INSPECT PARKING BRAKE SHOE LINING THICKNESS 
   1. Using a ruler, measure the thickness of the shoe lining.

      Standard thickness: 2.0 mm (0.079 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, uneven wear, replace the brake shoe.

   Fig 6: Measuring Shoe Lining Thickness Using A Ruler

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
10. 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.

    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: Inspecting Brake Disc And Parking Brake Shoe Lining For Proper Contact

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
11. APPLICATION OF HIGH TEMPERATURE GREASE 
    1. Apply the high temperature grease to the shoe attached surface of backing plate.
12. INSTALL PARKING BRAKE SHOE 
    1. Install the shoe lever and shim to the rear shoe with a new C-washer.
    2. Using a feeler gauge, measure the clearance.
       Fig 8: Measuring Clearance Using A Feeler Gauge

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

       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.

       SHIM THICKNESS - REFERENCE TABLE
       
       

       Shim Thickness	Shim Thickness
       0.3 mm (0.012 in.)	0.9 mm (0.035 in.)
       0.6 mm (0.024 in.)	-

    3. Apply the high temperature grease to the adjusting bolt.
    4. Install the shoe adjusting screw set and 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: Installing Shoe Adjusting Screw Set

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
13. INSTALL PARKING BRAKE SHOE STRUT LH 
14. INSTALL PARKING BRAKE SHOE STRUT COMPRESSION SPRING 
15. INSTALL PARKING BRAKE SHOE RETURN TENSION SPRING 
    1. Using needle nose pliers, install the 2 return tension springs.
    Fig 10: Installing Return Tension Springs

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
16. CHECK PARKING BRAKE INSTALLATION 
    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: Checking Parking Brake Installation

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
17. INSTALL REAR DISC 
18. ADJUST PARKING BRAKE SHOE CLEARANCE 
    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 can rotate smoothly.

       Standard: Return 8 notches 

    4. Check shoe is no brake drag.
    5. Install the hole plug.
    Fig 12: Adjusting Parking Brake Shoe Clearance

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
19. INSTALL REAR DISC BRAKE CALIPER ASSY LH 
    1. Install the rear disc brake caliper with the 2 bolts.

       Torque: 47 N.m (480 kgf.cm, 35 ft.lbf) 

20. INSTALL REAR WHEEL 

    Torque: 103 N.m (1,050 kgf.cm, 76 ft.lbf) 

21. INSPECT AND ADJUST PARKING BRAKE PEDAL TRAVEL (PEDAL TYPE PARKING BRAKE) (See  ADJUSTMENT  ) 
22. INSPECT AND ADJUST PARKING BRAKE LEVER TRAVEL (LEVER TYPE PARKING BRAKE) (See  ADJUSTMENT  )