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Home >> Toyota >> 2007 >> Avalon XLS >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes - Mechanical >> Brake Master Cylinder >> Inspection

Brake Master Cylinder: Inspection

  1. INSPECT AND ADJUST BRAKE BOOSTER PUSH ROD 
    NOTE: Make an adjustment with the brake booster assembly having no vacuum. (Depress the brake pedal several times with the engine off.)

    HINT:

    Adjustment of the brake booster push rod is required if the brake master cylinder sub-assembly is replaced with a new one. The adjustment is not necessary if the brake master cylinder sub-assembly is reinstalled and the brake booster assembly is replaced with a new one.

    1. Apply the chalk to the tip of an accessory tool.

      HINT:

      An accessory tool is enclosed with a new brake master cylinder sub-assembly.

    2. Place the accessory tool on the brake booster assembly.
    3. Measure the clearance between the brake booster push rod and accessory tool.

      Clearance: 

      0 mm (0 in.) 

      HINT:

      Adjust the clearance in the following cases:

      • If there is a clearance between the accessory tool and the shell of the brake booster (floating accessory tool), the push rod is protruding too far.
      • If the chalk does not stick on the tip of the brake booster push rod, the push rod protrusion is insufficient.
      Fig 1: Placing Accessory Tool On Brake Booster Assembly
      G05001676Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. If clearance is outside the specified range, fix the push rod using SST and adjust the length of the protruding adjusting bolt.

      SST 09737-00020 

      HINT:

      When adjusting the push rod, depress the brake pedal sufficiently so that the push rod sticks out.

    Fig 2: Adjusting Clearance
    G05001677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002