Bleeding The Brake System: Notes
WARNING:
Pressure sensor not calibrated or calibrated incorrectly
- Unexpected vehicle handling
- PSM does not function
- PSM malfunction
→ After fitting the brake master cylinder or the hydraulic unit, calibrate the pressure sensor using PIWIS Tester II 9818 .
→ To do this, calibrate the pressure sensor in the menu >> PSM >> Calibration >> Pressure sensor <<.
→ The security code is stored under >> PSM >> Actual values >> Security code <<. The code is entered in the last four positions.
Information
- Observe brake fluid quality. Use only new DOT 4 brake fluid.
- The brake fluid change interval is two years, using Super DOT 4 brake fluid.
- This brake fluid is available under the following part numbers: Container quantity: 1 litre = 000.043.203.66. 30 litres = 000.043.203.67.
- Open the reservoir.
- Connect a bleeding device to the brake fluid reservoir. Switch on the bleeding device. Bleeding pressure is approx. 2.0 bar.
Information
- Always bleed both bleeder valves on the brake caliper.
- Bleed the outer bleeder valve first.
- Continue the bleeding procedure at the brake calipers. Do so in the following sequence: rear right/rear left/front right/front left.
- Use a transparent hose and a collecting bottle to check the escaping brake fluid is clean and free of air bubbles and to determine the amount of brake fluid used.
- Open each bleeder valve until clear, bubble-free brake fluid emerges.
- Tighten the bleeder valves to the specified tightening torque and remove the bleeder hoses.
- Remove bleeding device from brake fluid reservoir and screw cap on. The brake fluid level in the brake fluid reservoir must be between the MIN and MAX markings once the vehicle has been filled and bled. Adjust the brake fluid level if necessary.
- Generate vacuum in brake booster by starting engine. Check brake-pedal travel and pedal feel.