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Home >> Lexus >> 2005 >> GS 300 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes - Mechanical >> Rear Brake Pad >> Replacement

Rear Brake Pad: Replacement

  1. REMOVE REAR WHEEL 

    Remove the rear wheel and temporarily fasten the disc with 3 hub nuts.

  2. INSPECT PAD LINING THICKNESS 

    Check the pad thickness through the caliper inspection hole and replace pads if the thickness is not within the specification.

    Minimum thickness: 1.0 mm (0.039 in.) 

    Fig 1: Checking Pad Thickness Through Caliper Inspection Hole
    G02940733Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE ANTI-SQUEAL SPRING AND PAD GUIDE PIN 
    1. Raise the "B" portion with hand, push up the "A" portion and disengage the anti-squeal spring from brake caliper.
    2. Remove the anti-squeal spring.
      NOTE:
      • Do not deform the clip and anti-squeal spring.
      • The clip and anti-squeal spring can be used again provided that they have sufficient rebound, no-deformation, cracks or wear, and have had all rust, dirt and foreign particles cleaned off.
      Fig 2: Removing Anti Squeal Spring & Clip And Pad Guide Pin
      G02940734Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the clip and pad guide pin.
  4. REMOVE PADS AND ANTI-SQUEAL SHIMS 
    1. Remove the 2 pads.
    2. Remove the 4 anti-squeal shims from each pad.
  5. CHECK DISC THICKNESS AND RUNOUT 

    (See  INSPECTION  ) 

  6. INSTALL NEW PADS 
    NOTE: When replacing worn pads, the anti-squeal shims must be replaced together with the pads.
    1. Apply disc brake grease to both sides of inner anti-squeal shims (See REAR BRAKE PAD ).
    2. Install the 2 anti-squeal shims on each pad.

      HINT:

      Make sure the arrows on the inner anti-squeal shims facing to the direction of disc rotation as shown in the illustration.

      Fig 3: Installing Anti Squeal Shims
      G02940735Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Draw out a small amount of brake fluid from the reservoir.
    4. Press in the pistons with a monkey wrench handle or equivalent.

      HINT:

      • Tape the monkey wrench handle before use.
      • If the piston is difficult to push in, loosen the bleeder plug and push in the piston while letting some brake fluid escape.
      Fig 4: Pressing Piston Back Into Caliper
      G02940736Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Install the 2 pads.
  7. INSTALL PAD GUIDE PIN AND ANTI- SQUEAL SPRING 
    1. Install the pad guide pin and clip.
    2. Install the anti-squeal spring.

      HINT:

      • Ensure that the claw of the anti-squeal spring is raised up on the caliper securely.
      • Ensure that there is no gap between the pad guide pin and anti-squeal spring.
      • Ensure that "A" and "B" portions of anti-squeal spring are attached to the pad.
      Fig 5: Installing Anti Squeal Spring
      G02940737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. INSTALL FRONT WHEEL 

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

  9. DEPRESS BRAKE PEDAL SEVERAL TIMES 
  10. CHECK THAT FLUID LEVEL IS AT MAX LINE 
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