LS400 1990-1997

Brake Pads

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Removal & Installation



Specific to:

Lexus LS400 1993

  1. Raise and safely support the vehicle.
  2.  
  3. Remove the tire and wheel assembly.
  4.  
  5. Hold the sliding pin on the lower mounting bolt and remove the bolt. Swivel the caliper upward and out of the way. Support the caliper. Do not disconnect the brake line.
  6.  
  7. Remove the two anti-squeal springs, the brake pads, the four anti-squeal shims, the wear indicators and the four pad support plates.
  8.  

To install:

  1. Install the pad support plates and the pad wear indicator plate on the inside pad.
  2.  
  3. Apply disc brake grease to both sides of the anti-squeal shims. Install the shims to the pads. Do not allow any grease to contact the friction surface of the pad.
  4.  
  5. Install both pads with the wear indicator plates facing downward.
  6.  
  7. Install the anti-squeal springs. Press in the caliper pistons with a C-clamp and the old inner brake pad. Install the caliper over the pads.
  8.  
  9. Hold the sliding pin and tighten the mounting bolts to 25 ft. lbs. (34 Nm).
  10.  
  11. Install the tire and wheel assembly.
  12.  
  13. Lower the vehicle and check the brake fluid level in the reservoir.
    NOTE
    Be sure to pump the brakes several times to attain a firm brake pedal prior to moving the vehicle.

  14.  
  15. Road test the vehicle for proper operation.
  16.  

Specific to:

Lexus LS400 1994

  1. Remove rear wheel.
  2.  
  3. Inspect pad lining thickness.
    1. Check the pad thickness through the caliper inspection hole and replace pads if not within specification. Minimum thickness: 0.039 inch (1.0 mm).
    2.  

  4.  
  5. Remove caliper.
    1. Hold the sliding pin and loosen the installation bolt.
    2.  
    3. Remove the installation bolts.
    4.  
    5. Remove the brake caliper and suspend it with string.
      NOTE
      Do not disconnect the flexible hose from the brake caliper.

    6.  

  6.  
  7. Remove 2 anti-squeal springs.
  8.  
  9. Remove pads.
    1. Remove the 2 pads.
    2.  
    3. Remove the clip, and disconnect the pad wear indicator from the inside pad.
    4.  

  10.  
  11. Remove 4 pad support plates.
  12.  
  13. Check pad wear indicator.
  14.  
  15. Check disc thickness and runout.

    Click image to see an enlarged view

    Fig. Rear disc brake components

  16.  

To install:

  1. Install the 4 pad support plates.
  2.  
  3. Install new pads.
    1. Connect the pad wear indicator to the inside pad, and install a new clip.
    2.  
    3. Install the inside pad with the pad wear indicator facing downward.
    4.  
    5. Install the outside pad, as shown in the illustration.
      NOTE
      There should be no oil or grease adhering to the friction surfaces of the pads or the disc.

    6.  
    7. Install the 2 anti-squeal springs.
    8.  

  4.  
  5. Install caliper.
    1. Draw out a small amount of brake fluid from the reservoir.
    2.  
    3. Press in the piston with a hammer handle or similar implement.
      NOTE
      If the piston is difficult to push in, loosen the bleeder plug and push in the piston while letting some brake fluid escape.

    4.  
    5. Temporarily install the caliper on the torque plate with the 2 installation bolts.
    6.  
    7. Hold the sliding pin and torque the 2 installation bolts. Tighten bolts to 25 ft. lbs. (34 Nm).
    8.  

  6.  
  7. Install rear wheel.
  8.  
  9. Check that fluid level is at max line.
  10.  

Specific to:

Lexus LS400 1995-1997

  1. Remove rear wheel.
  2.  
  3. Inspect pad lining thickness.
    1. Check the pad thickness through the caliper inspection hole and replace pads if they are not within the specification. Minimum thickness: 0.039 inch (1.0 mm).
    2.  

  4.  
  5. Remove caliper.
    1. Hold the sliding pin and loosen the installation bolt.
    2.  
    3. Remove the 2 installation bolts.
    4.  
    5. Remove the caliper and suspend it securely.
      NOTE
      Do not disconnect the flexible hose from the caliper.

    6.  

  6.  
  7. Remove pads.
    1. Remove the 2 anti-squeal springs.
    2.  
    3. Remove the 2 pads.
    4.  
    5. Remove the 4 anti-squeal shims.
    6.  
    7. Right wheel, remove the clip, and disconnect the pad wear indicator from the inner pad.
    8.  
    9. Remove the 4 pad support plates.
      NOTE
      The anti-squeal springs and support plates 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.

    10.  

  8.  
  9. Right wheel, check pad wear indicator.
  10.  
  11. Check disc thickness and runout.

    Click image to see an enlarged view

    Fig. Rear disc brake pad components

  12.  

To install:

  1. Install 4 pad support plates.
  2.  
  3. 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 the inner anti-squeal shims.
    2.  
    3. Install the 2 anti-squeal shims to each pad.
      NOTE
      Make sure the inner anti-squeal shims are facing the front (rotation direction) as shown in the illustration.

    4.  
    5. Right wheel, Connect the pad wear indicator to the inner pad, and install a new clip. Then install the inner pad with the pad wear indicator facing downward.
    6.  
    7. Install the other pads, as shown in the illustration.
      NOTE
      There should be no oil or grease adhering to the friction surfaces of the pads or disc.

    8.  
    9. Install the 2 anti-squeal springs.
    10.  

  4.  
  5. Install caliper.
    1. Draw out a small amount of brake fluid from the reservoir.
    2.  
    3. Press in the piston with a hammer handle or similar implement.
      NOTE
      If the piston is difficult to push in, loosen the bleeder plug and push in the piston while letting some brake fluid escape.

    4.  
    5. Temporarily install the caliper on the torque plate with the 2 installation bolts.
    6.  
    7. Hold the sliding pin and torque the 2 installation bolts. Tighten bolts to 25 ft. lbs. (34 Nm).
    8.  

  6.  
  7. Install rear wheel.
  8.  
  9. Check that fluid level is at max line.
  10.  

 
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