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Home >> Lexus >> 2005 >> GS 300 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes - Mechanical >> Hydraulic Brake Booster >> Removal

Hydraulic Brake Booster: Removal

NOTE: Before starting the work, make sure that the ignition switch is OFF and depress the brake pedal more than 40 times.

HINT:

When a pressure in power supply system is released, reaction force becomes heavy.

NOTE:
  • As high pressure is applied to the brake actuator No. 1 tube, never deform it.
  • Until the work is over, do not turn the ignition switch ON.
  1. DRAW OUT FLUID WITH SYRINGE 
    NOTE: Do not let brake fluid remain on a painted surface. Wash it off immediately.
  2. REMOVE NO. 1 UNDER COVER (See  INSTRUMENT PANEL  ) 
  3. REMOVE END PAD AND NO. 1 SAFETY PAD 
  4. REMOVE NO. 7 HEATER TO REGISTER DUCT 
  5. DISCONNECT BRAKE LINES 

    Using SST, disconnect the 4 brake lines.

    SST 09023-00101

    Torque: 15 N.m (155 kgf.cm, 11 ft.lbf) 

    Fig 1: Disconnecting Brake Lines
    G02940772Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. DISCONNECT LEFT FRONT WHEEL BRAKE LINE 

    Using SST, disconnect the left front wheel brake line from the flexible hose.

    SST 09023-00101

    Torque: 15 N.m (155 kgf.cm, 11 ft.lbf) 

    Fig 2: Disconnecting Left Front Wheel Brake Line
    G02940773Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. REMOVE 2 BRAKE LINE CLAMPS 
  8. DISCONNECT LEVEL WARNING SWITCH CONNECTOR 
  9. DISCONNECT 4 CONNECTORS 
    Fig 3: Disconnecting Connectors
    G02940774Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE PEDAL RETURN SPRING, CLIP AND CLEVIS PIN 
  11. REMOVE HYDRAULIC BRAKE BOOSTER ASSEMBLY 
    1. Remove the 4 booster installation nuts.

      Torque: 13 N.m (130 kgf.cm, 9 ft.lbf) 

    2. Remove the booster assembly and gasket.
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