Brake master cylinderpower booster removing and installing

— Remove driver's side floor mats and pedal cluster cover.

^ Working above and forward of pedal cluster, remove locking clip (arrow) from brake pedal push rod and pull out pin.

^ Working above pedal cluster, remove master cylinder mounting bolt (arrow) above driver's knees.

^ Working In luggage compartment, disconnect power booster vacuum hose at connection in luggage compartment floor (arrow).

Fuel Line Repair 911 Porcshe

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^ Detach and remove air duct hoses (arrows) behind master cylinder/power booster assembly.

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Braking System Porsche 911 930

— Drain master cylinder reservoir using a syringe.

• Detach master cylinder feed lines.

• Remove fluid reservoir and set aside.

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Disconnect both stop light switch plugs (arrows) at master cylinder.

Loosen and remove brake lines (arrows) from master cylinder.

— Drain master cylinder reservoir using a syringe.

• Detach master cylinder feed lines.

• Remove fluid reservoir and set aside.

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Bleed Brakes 1984 Porsche 911

Remove pedal cluster brace bolt (A) from side of power booster mounting bracket.

— Remove power booster bracket mounting nuts (arrows). Remove master cylinder and power booster as a unit.

^ With booster and master cylinder on work bench, remove master cylinder mounting nuts (arrows) and pull cylinder out of power booster.

— Installation is reverse of removal.

^ When attaching brake pedal push rod to reversing lever, be sure to insert pivot pin so that locking clip (arrow) can be installed from the right side.

— Be sure to bleed complete brake system as described earlier.

— On 1987 or later models: Bleed clutch slave cylinder.

Tightening torques

• Bleeder screw

• Brake line to master cylinder 14 Nm (10 ft-lb)

• Brake light switch to master cylinder 15 Nm (11 ft-lb)

• Master cylinder to booster 25 Nm (18 ft-lb)

• Power booster to luggage compartment floor 25 Nm (18 ft-lb)

• Pedal cluster brace to power booster... 46 Nm (33 ft-lb)

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Responses

  • john
    How to remove brake booster with master cylinder?
    8 years ago
  • layton wallace
    How to loosen master cylinder feedline nuts?
    8 years ago

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