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Brake Booster - Cougar, Mustang & THUNDERBIRD: Removal

  1. Disconnect battery and remove air cleaner. Disconnect manifold vacuum hose from booster check valve. Disconnect brake lines from master cylinder. Remove 2 nuts attaching master cylinder to brake booster. Remove master cylinder.
  2. Under left side of dash, remove stoplight switch wiring connector from switch. Remove hairpin retainer and outer nylon washer from brake pedal pin just far enough for outer arm to clear pin. Remove switch. Avoid damaging switch during removal. Remove booster-to-firewall attaching nuts.
  3. On vehicles equipped with speed control, remove control amplifier and set aside. Control amplifier is mounted to lower outboard booster stud. Slide booster push rod, bushing, and inner nylon washer off brake pedal pin.
  4. Under hood, move booster forward until booster studs clear firewall. Rotate front of booster inward (toward engine) and remove booster by raising up until clear.
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