911 Carrera 4 Cabriolet (996) F6-3.4L (1999)
Vacuum Brake Booster: Service and Repair
Removing and Installing Brake Booster
Removing and Installing Brake Booster
Removal
Note!
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To remove and install brake booster -C-, the brake master cylinder -B-, the hydraulic unit -D- and the booster pump -A- in vehicles with PSM must
be removed.
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The assembly of the brake master cylinder -B- with the brake booster -C- must not be disconnected for removal and installation if both parts
should be continued to be used!
1. Switch off ignition. Remove cover -A and B-.
2. Remove spare wheel (if present).
3. Drain brake fluid expansion tank. To do so, suck brake fluid out of the expansion tank or pump out the brake fluid using the brake pedal via a front
and a rear brake caliper (use collecting bottle).
4. For vehicles with manual transmission, remove the clutch line at the reservoir.
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Press on the ring to do this (unlocking) and pull the line out of the reservoir at the same time.
5. Disconnect the electrical line (plug) on the reservoir.
6. Undo the brake lines on the brake master cylinder. Close the brake lines and the brake line connections with suitable plugs. Undo the fastening
nuts -A- of the brake master cylinder. Pull out brake master cylinder.
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The brake master cylinder must be disconnected from the brake booster if both parts should continue to be used!