911 Carrera 4 Cabriolet (996) F6-3.4L (1999)
Brake Bleeding: Service and Repair
Bleeding Brakes - Vehicle With PSM
PSM
The 911 Carrera 4 (996) is standardly equipped with PSM (Porsche Stability Management). PSM variants: production launch with PSM 5.3 and as of
model year 2000 (Y-range) PSM 5.7.
The 911 Carrera (996) is equipped with PSM 5.7 as of model year 2000 (Y-range) on special request.
NOTE:
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Observe brake-fluid quality! Use only new DOT4 brake fluid!
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The brake-fluid change interval using Super DOT4 brake fluid is two years!
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This brake fluid is available under the following part numbers:
Quantity supplied 1 litre = 000.043.203.66! Container quantity 30 litres = 000.043.203.67!
Procedure For Bleeding
1. Bleed brakes as usual.
2. Then bleed at front on right with running booster pump.
1. Step: Bleed brakes as usual
CAUTION:
For vehicles with extremely high mileage or for very old vehicles, damage to the brake master cylinder can occur and the primary boots can be
damaged!
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Double the number of pumping cycles and use only half of the master brake cylinder stroke!
1. Fill reservoir to its top edge with new brake fluid.
2. Connect a bleeding device to the brake fluid reservoir. Switch on the bleeding device. Bleeding pressure approximately 2.0 bar.
NOTE: Bleed the outer bleeder valve first!
3. Continue bleeding at the brake calipers in the sequence:
Sequence: Rear right/rear left/front left/front right.
4. Open each bleeder valve until clear, bubble-free brake fluid emerges.
5. Use a transparent hose and a collecting bottle to check the escaping brake fluid accurately for cleanliness, lack of air bubbles and to determine the
brake fluid used.
After installing a new brake master cylinder and/or a new hydraulic unit, do the following while bleeding:
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Open the right rear bleeder valves, then fully depress the brake pedal several times.
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Hold for 2 - 3 seconds after each depression, then release slowly.
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Repeat this procedure in the sequence rear left/front right/front left. This will remove all air bubbles (from the primary circuit).
NOTE: Also carry out this procedure if the brake hydraulics was largely empty or if after bleeding residual air can be detected by excessive
brake-pedal travel!
6. Continue bleeding at front on right with running booster pump (Step 2).