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Home >> Lincoln >> 2003 >> Navigator RWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Power Brake Actuation -- Brake Booster >> Removal And Installation >> Brake Booster >> Removal and Installation

Removal and Installation

  1. Disconnect the battery negative cable. For additional information, refer to BATTERY, MOUNTING AND CABLES .
  2. Loosen the clamp and separate the air cleaner outlet tube and resonator from the air cleaner.
    Fig 1: Loosening Clamp And Separating Air Cleaner Outlet Tube And Resonator From Air Cleaner
    G01561291Courtesy of FORD MOTOR CO.

    Hose and Check Valve 

    The power brake booster check valve:

    • closes when the engine is turned off.
    • in the closed position, traps engine vacuum in the power brake booster.
    • retains vacuum to provide several power-assisted brake applications with the engine off.
  3. Disconnect the mass air flow (MAF) sensor electrical connector.
    Fig 2: Disconnecting Mass Air Flow (MAF) Sensor Electrical Connector
    G01561292Courtesy of FORD MOTOR CO.
  4. Lift the air cleaner assembly from the air cleaner tray.
    Fig 3: Lifting Air Cleaner Assembly From Air Cleaner Tray
    G01561293Courtesy of FORD MOTOR CO.
  5. Remove the screws and position aside the power steering reservoir.
    Fig 4: Removing Screws And Positioning Aside Power Steering Reservoir
    G01561294Courtesy of FORD MOTOR CO.
  6. Disconnect the brake fluid level switch and if equipped, the brake pressure switch.
    Fig 5: Disconnecting Brake Fluid Level Switch And
    G01561295Courtesy of FORD MOTOR CO.
  7. NOTE: Support the master cylinder with a wire tie or mechanics wire.
    Fig 6: Removing Nuts And Positioning Master Cylinder Aside
    G01561296Courtesy of FORD MOTOR CO.
  8. Remove and discard the two nuts and position the master cylinder aside.
  9. Remove the mounting bolts for the degas bottle and position aside.
    Fig 7: Removing Mounting Bolts For Degas Bottle And Position Aside
    G01561297Courtesy of FORD MOTOR CO.
  10. If equipped, disconnect the wiring at the pedal travel sensor and solenoid.
    Fig 8: Disconnecting Wiring At Pedal Travel Sensor And Solenoid
    G01561298Courtesy of FORD MOTOR CO.
  11. Release the clamp and disconnect the hose.
    Fig 9: Releasing Clamp And Disconnecting Hose
    G01561299Courtesy of FORD MOTOR CO.
  12. Remove the pin, washer, bushing and switch, and disconnect the booster pushrod.
    Fig 10: Removing Pin, Washer, Bushing And Switch, And Disconnecting Booster Pushrod
    G01561300Courtesy of FORD MOTOR CO.
  13. Remove the nuts and the brake booster.
    • To access the retaining nuts, fold back the sound insulation.
  14. NOTE: The booster pushrod must be installed with the pushrod offset pointing downward.
  15. To install, reverse the removal procedure.
    • Use new nuts when installing the master cylinder.
      Fig 11: Installing Master Cylinder
      G01561301Courtesy of FORD MOTOR CO.