Filling the rear control circuit e Attention: On account of the vacuum extraction process, it is not possible to tell whether there is brake fluid in the hose of the brake bleeding device when it is free of bubbles. Consequently, the system must be bled again manually in the specified sequence and in ac- cordance with the instructions for bleeding the brakes . • Remove rear reservoir cap with rubber dia- phragm. Bleeding the rear control circuit • Switch off the brake bleeding device. • In the following sequence, bleed: – rear metering cylinder (1), – rear integral circuit (2), – rear control circuit (3) and – rear metering cylinder (1) for the second time using ring spanner, BMW No.
34 2 532 , in accord- ance with instructions for bleeding. R22000151 • Top up the brake fluid level to the “MAX” mark. e Attention: While filling and bleeding the system, do not allow the brake fluid level to drop below the “MIN” mark, as otherwise air will be drawn into the brake system. Instructions for bleeding: 1. Slowly depress brake lever until brake-light switch clicks (blow-by bore closed). 2. Open the bleed screw. 3. Slowly depress brake lever to full extent of its trav- el and close the bleed screw. 4. Slowly release the brake lever. 5. Repeat steps 1 to 4 until the bake fluid is clear and free of bubbles. d Warning:
When performing maintenance and repair work on BMW Integral ABS, never pump quickly or vigorous- ly. 2 3 1 R28340110 • Draw off the brake fluid from the circuits in the correct sequence while topping up continuously with fresh brake fluid and using ring spanner, BMW No. 34 2 532 : – rear metering cylinder (1), – rear integral circuit (2), – rear control circuit (3) and – rear metering cylinder (1) for the second time. 34.21