911 Carrera 4S Coupe AWD F6-3600cc 3.6L SOHC (1997)
Brake Fluid: Service and Repair
With Vacuum Brake Booster
Changing Brake Fluid (vacuum brake booster)
Important notes
Use only new DOT 4 brake fluid. Observe change interval and brake fluid quality.
Total brake fluid quantity approx. 1 liter.
Procedure for changing brake fluid
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Fill reservoir with new brake fluid up to upper edge. Connect bleeder device to reservoir.
Clamp shut overflow hose/venting hose with a hose clamp. The overflow hose/venting hose has been omitted as from October 1995.
Switch on bleeder device. Bleeder pressure approx. 1.5 bar.
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Proceed with brake fluid change on the individual calipers (no particular sequence required).
Open each bleeder valve until clear, bubble-free brake fluid escapes or until the respective change quantity per caliper is reached (approx. 250 cc).
Make sure all brake calipers are bled on both bleeder valves.
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To monitor the escaping brake fluid for cleanliness, freedom from air bubbles and to determine the brake fluid used, use a recipient bottle.
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Also drain some brake fluid at the bleeder valve of the clutch slave cylinder (approx. 50 cc).
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Switch off and disconnect bleeder device. Top up brake fluid if required.
