Removing Brake Master Cylinder

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Before disconnecting the brake lines, place a clean absorbent cloth underneath.
Close off brake lines with a suitable plug immediately after disconnecting.

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In the event of assembly work at the hydraulic connections, all electric plug connections in the area of the connection point must always be connected. This prevents the inside of the plug connections from being splashed with brake fluid or water.
Clean any plug connections that have become dirty or damp during removal and fitting using a lint-free cloth, for example.
Brake fluid on electrical contacts (even thinned brake fluid) leads to corrosion and may cause faults in the system.
Remove any escaping brake fluid immediately; rinse with water and dry thoroughly if necessary.

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The pictures shown in this document may differ from the original.

Fig 1: Identifying Installation Position Of Brake Master Cylinder
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Fig 2: Identifying Brake Master Cylinder Components

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Release sieve filter -1- using a suitable tool -2- and remove it from the brake fluid reservoir -3- .

Fig 3: Removing Sieve Filter In Brake Fluid Reservoir
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Drain brake fluid from the brake fluid reservoir -3- using a suitable tool, e.g. a double-action hand pump.
Remove brake lines from the brake master cylinder -3- .

Fig 4: Removing Brake Master Cylinder
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 3.1. Removing union nuts -2- .
2. 3.2. Pull brake lines out of the bores.
3. 3.3. Immediately close off brake lines and bores in the brake master cylinder -3- using suitable stoppers.
Release electric plug connection -1- for the brake fluid level indicator and disconnect it -arrow A- .
Release and disconnect electric plug connection for the brake light switch. → 943619 REMOVING AND INSTALLING BRAKE LIGHT SWITCH
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If the brake master cylinder is to be replaced, first remove the brake fluid reservoir and then unscrew the fastening nuts for the brake master cylinder (see section entitled "REPLACING BRAKE MASTER CYLINDER ", ff.).
Remove fastening nuts -1- for the brake master cylinder -2- on the brake booster -3- .

Fig 5: Identifying Fastening Nuts, Brake Master Cylinder And Brake Booster
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Carefully remove the brake master cylinder -1- and brake fluid reservoir -2- from the brake booster -3- and set them down on a suitable surface.

Fig 6: Identifying Brake Master Cylinder, Brake Fluid Reservoir And Brake Booster
Courtesy of PORSCHE CARS NORTH AMERICA, INC.