911 Turbo AWD F6-3600cc 3.6L SOHC Twin Turbo (1997)
3. Attach plug to pressure warning switch (arrow).
4. Partly bleed the booster circuit as follows:
Open the bleed valve at the pressure reservoir. Attach the electrical plug to the pump. As soon as brake fluid emerges free from air bubbles,
pull off the electrical plug and close the bleed valve.
Next, charge the pressure reservoir completely. To do this, attach the electrical plug. As soon as the pump is heard to switch off, pull off the
electrical plug and relieve the pressure completely at the pressure reservoir bleed valve. Slowly open the bleed valve and hold the bleed hose
firmly.
Warning: a pressure of up to 180 bar is present at the valve.
Wear protective goggles and gloves.
5. Connect pressure gauge SW 9509 to the pressure reservoir and check the switching points of the pressure warning switch and also for leakage in
the booster circuit. The precise working procedure. and desired values are stated in Pressure Tests On Booster Circuit under Testing and
Inspection.
Notes
If necessary, top up the brake fluid level at intervals so that the fluid reservoir is not drained completely. The booster circuit must be at zero pressure
when connecting and removing the pressure gage.
6. After testing and assembly work has been completed, correct the brake fluid level with the pressure reservoir completely filled.
