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Hydraulic Brake Booster: Removal

NOTE:
  • Be sure not to allow the pump to contact the floor; support it with the booster body. If the pump contacts the floor, the red brake tube between the pump and booster body may be deformed, the operating sound of the pump may become loud enough to hear within the cabin, and fluid may leak.
  • When installing, coat the parts indicated by arrows with lithium soap base glycol grease (See HYDRAULIC BRAKE BOOSTER  ).
  • As high pressure is applied to the brake actuator tube No. 1, never deform it.
  • Until the work is over, do not turn the engine switch on (IG).
  • Before starting the work, make sure that the engine switch is off and depress the brake pedal more than 20 times.

HINT:

When pressure in the power supply system is released, the reaction force becomes light and the stroke becomes longer.

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
  2. DRAIN BRAKE FLUID 
    NOTE: Wash off brake fluid immediately if it comes into contact with a painted surface.
  3. REMOVE FRONT DOOR SCUFF PLATE LH  (See REMOVAL )
  4. REMOVE COWL SIDE TRIM BOARD LH  (See REMOVAL )
  5. REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY  (See REMOVAL )
  6. REMOVE LOWER NO. 1 INSTRUMENT PANEL FINISH PANEL  (See REMOVAL )
  7. REMOVE DRIVER SIDE KNEE AIRBAG ASSEMBLY  (See REMOVAL )
  8. REMOVE PUSH ROD PIN  (See REMOVAL  )
  9. REMOVE HYDRAULIC BRAKE BOOSTER ASSEMBLY 
    1. Disconnect the 3 connectors from the hydraulic brake booster assembly.
      Fig 1: Locating Hydraulic Brake Booster Assembly Connectors
      G05638945Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Use tags or make a memo to identify the place to reconnect.
      Fig 2: Identifying Tube Locations To Tag
      G05638946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using a union nut wrench, disconnect the 4 brake lines from the hydraulic brake booster assembly.
      Fig 3: Disconnecting Brake Lines From Hydraulic Brake Booster Assembly
      G05638947Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the 4 nuts and pull out the hydraulic brake booster assembly.
  10. REMOVE BRAKE BOOSTER GASKET 
    1. Remove the brake booster gasket from the hydraulic brake booster assembly.
      Fig 4: Locating Brake Pedal Support Assembly Nuts
      G05638921Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002