BMW R1150RT - MAINTENANCE INTEGRAL ABS Maintenance Manual Page 84

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Filling the rear control circuit
Remove rear reservoir cap with rubber dia-
phragm.
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.
d
Warning:
When performing maintenance and repair work on
BMW Integral ABS, never pump quickly or vigorous-
ly.
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.
e
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.
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
R22000151
rear metering cylinder (1) for the second time
using ring spanner, BMW No. 34 2 532, in accord-
ance with instructions for bleeding.
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.
2
3
1
R28340110
Attention:
34.21

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