Motorcycle BMW R1150RT. Manual - part 13

00.48 

Instructions for filling rear wheel 
circuit reservoir

e

 Attention:

Integral brakes, the front brake must be ready for 
use.

•

Top up fluid in rear wheel-circuit reservoir to 
“MAX” mark if necessary.

•

Fully tighten resetting tool, BMW No. 34 1 531, 
and adapter, BMW No. 34 1 536.

e

 Attention:

The piston in the base of the wheel-circuit reservoir 
must always be covered by the fluid, as otherwise air 
can be drawn into the brake system.
Bleed the system again if this happens.

•

Switch on the ignition.

L

 Note:

After switching on the ignition, always wait for the 
BMW Integral ABS to complete its self-diagnosis.
Do not operate the brake lever until self-diagnosis 
has completed.

•

Operate the footbrake lever until the pistons of 
the rear brake caliper are in contact with
resetting tool, BMW No. 34 1 531, and 
adapter, BMW No. 34 1 536.

•

Top up the fluid in the wheel-circuit reservoir until 
one of the three protrusions in the filler neck just 
touches the surface of the fluid (arrow).

•

Remove resetting tool, BMW No. 34 1 531, and 
adapter, BMW No. 34 1 536.

d

 Warning:

Make sure that the wheel-circuit reservoir does not 
overflow when the brake pads/brake calipers are in-
stalled.

•

Install rear brake pads and brake caliper.

•

Hand-tighten cap of rear wheel-circuit reservoir.

•

Check operation of the brake system with the ig-
nition switched on.

e

 Attention:

After all the work on the brake system has been 
completed, run a bleed test using the 
BMW MoDiTeC.

•

Perform bleed test with BMW MoDiTeC 
(

a

00.31).

•

Install fuel tank.

Brake fluid ...................................................DOT 4

X 

Tightening torque:

Bleed screw in rear brake caliper ................... 5 Nm
Brake caliper to rear wheel drive .................. 40 Nm

R28000170

34 1 536

34 1 531

MAX

MIN

R28340090

 00.49

Only bleeding the rear wheel circuit

–

Draw off the old brake fluid from the wheel-circuit 
reservoir.

–

Remove rear brake pads, force back the brake 
pistons and secure the pistons in this position.

–

Wrap a cloth around the rear brake caliper.

•

Fill rear wheel-circuit reservoir with brake fluid up 
to “MAX” mark and install 
cap, BMW No. 34 2 541. 

•

Connect 1.5 m silicon 
hose, BMW No. 34 1 561, to the bleed screw.

L

 Note:

If necessary, use a cable tie to secure the bleed 
hose to the bleed screw.

•

Switch on the ignition.

L

 Note:

After switching on the ignition, always wait for the 
BMW Integral ABS to complete its self-diagnosis.
Do not operate the brake lever until self-diagnosis 
has completed.

•

Very gently press the footbrake lever until the 
pump just starts up.

•

Open the bleed screw.

•

Pump the brake fluid with virtually no pressure 
until the hose is full of brake fluid.

•

Connect end of hose to 
cap, BMW No. 34 2 541.

•

Pump the brake fluid with virtually no pressure to 
begin with, then vary the brake pressure.

d

 Warning:

Check that the brake fluid in the hose does not 
foam.
If the fluid foams, proceed as described in the sec-
tion on bleeding and changing brake fluid in rear 
wheel circuit (

a

00.46).

•

Pump brake fluid through the system until it is 
clear and free from air bubbles.

•

Close the bleed screw.

•

Release the brake and switch off the ignition.

•

Disconnect silicon hose, BMW No. 34 1 561, 
from bleed screw and drain the hose.

•

Remove cap, BMW No. 34 2 541.

e

 Attention:

After changing and/or bleeding the brakes, always 
top up the fluid in the wheel-circuit reservoir to the 
correct level in accordance with the instructions.

•

Fill rear wheel-circuit reservoir with brake fluid in 
accordance with instructions (

a

00.48).

•

Check operation of the brake system with the ig-
nition switched on.

e

 Attention:

After all the work on the brake system has been 
completed, run a bleed test using the 
BMW MoDiTeC.

Brake fluid ...................................................DOT 4

X 

Tightening torque:

Bleed screw in rear brake caliper ................... 5 Nm
Brake caliper to rear wheel drive .................. 40 Nm

R28000230

34 1 561

34 2 541

00.50 

34 00 091 

Changing/bleeding brake 

fluid in control circuit

Change brake fluid in control circuit every 2 
years
(Inspection IV)

d

 Warning:

All repair and maintenance work on the 
BMW Integral ABS must be performed by trained, 
qualified specialists.
Comply with all maintenance and repair instructions 
and always work through the various steps in the 
correct order.
Use only new brake fluid from freshly opened con-
tainers.

34 00 072 

Bleeding/changing brake fluid 

in front control circuit

d

 Warning:

When performing maintenance and repair work on 
BMW Integral ABS, never pump quickly or 
vigorously.

•

Turn the handlebars to full left lock.

•

Repeatedly and slowly pull front brake lever light-
ly to expel air from brake master cylinder.

•

Place the motorcycle on its main stand.

•

Remove fuel tank.

•

Turn the front wheel to a position in which the 
brake fluid reservoir is horizontal and secure the 
handlebars in this position.

e

 Attention:

Do not allow brake fluid to come into contact with 
painted parts of the motorcycle as brake fluid de-
stroys paint.

•

Wrap cloths around the reservoir.

•

Remove front reservoir cap with rubber dia-
phragm, draw off the old brake fluid and clean 
the reservoir.

•

Top up the brake fluid level to 
the “MAX” mark (arrow).

•

Connect the brake bleeding device to bleed 
screw (1) of the front metering cylinder, but 
do not switch on.

d

 Warning:

Do not use vacuum extraction to change the brake 
fluid in the control circuits or bleed the control cir-
cuits.

R21000020

R28340110

1

3

2

 00.51

e

 

Attention:

During the fluid-change and bleeding procedure, 
make sure that the fluid replenishing hole is always 
below the level of the brake fluid, or else air will be 
drawn into the brake system.
Bleed the system again if this happens.

•

Set the handbrake lever to position 4.

d

 Warning:

When performing maintenance and repair work on 
BMW Integral ABS, never pump quickly or vigorous-
ly.

•

In the following sequence, bleed:

–

front metering cylinder (1)

–

front integral circuit (2)

–

front control circuit (3) and

–

front 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 pull brake lever until brake-light switch 
clicks (blow-by bore closed).
2. Open the bleed screw.
3. Slowly pull brake lever to full extent of its travel 
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.

•

Fit the protective caps on the bleed screws.

•

Top up the brake fluid until the level reaches the 
“MAX” mark.

•

Wipe the rim of the reservoir, the rubber dia-
phragm and the cover to remove brake fluid, and 
carefully reassemble the components.

•

Recheck the brake-fluid level.

•

Place the motorcycle on its centre stand.

•

Turn the handlebars fully to the left.

Specified level 
not below ......................................................... MIN
(top edge of the marking ring)

e

 Attention:

After all the work on the brake system has been 
completed, run a bleed test using the 
BMW MoDiTeC.

Brake fluid ...................................................DOT 4

R28340110

1

3

2

R22000140