Motorcycle BMW R1150RT. Manual - part 70

34.25

e

 Attention:

The brake fluid must always be visible in the contain-
er, because the piston in the base of the wheel-cir-
cuit reservoir must always be covered by the fluid. 
The procedure must be repeated if the fluid drops 
below the “min” level.

•

Gently pull the handbrake lever until the pump 
just starts up.

•

Open the bleed screw, while topping up the 
container with new brake fluid if necessary.

•

Pump out the brake fluid with virtually no pres-
sure to begin with, then vary the brake pressure.

L

 Note:

The higher the brake pressure the faster the fluid is 
pumped through the system, which means that the 
level in the wheel-circuit reservoir drops all the more 
rapidly.

•

Pump off brake fluid until it emerges clear and 
free from air bubbles.

•

Close the bleed screw.

•

Release the brake.

•

Disconnect the brake bleeding device from the 
bleed screw.

•

Connect the brake bleeding device to the bleed 
screw of the right brake caliper, but 
do not switch on the device.

L

 Note:

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

•

The procedure for changing the brake fluid in the 
right brake caliper is the same as that for the 
left caliper.

•

When the brake fluid is clear and free of bubbles, 
continue pumping until the fluid in the container 
just disappears from view.

•

Close the bleed screw.

•

Release the brake and switch off the ignition.

•

Disconnect the brake bleeding device from the 
bleed screw.

•

Disconnect the container from the wheel-circuit 
reservoir.

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.

MAX

MIN

R28340090

34.26

Instructions for filling front wheel 
circuit reservoir

e

 Attention:

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

–

Install rear brake pads, if applicable.

•

Top up fluid in front wheel-circuit reservoir to 
“MAX” if necessary

•

Install adapters 22, BMW No. 34 1 533, in reset-
ting tool, BMW No. 34 1 531/532, for both front 
brake calipers, and tighten the resetting tool until 
the adapters are secure.

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.

•

Pull handbrake lever until the pistons of the front 
brake calipers are in contact with resetting 
tool, BMW No. 34 1 531.

•

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).

•

Screw container, BMW No. 34 1 581, 
onto front wheel circuit reservoir.

•

Remove adapter, BMW No. 34 1 533, and force 
back pistons far enough to allow the brake pads 
to be fitted.

•

Install front brake pads.

•

With the ignition switched on, bed in the brake 
pads against the brake discs.

•

Disconnect the container from the wheel-circuit 
reservoir.

•

Hand-tighten cap of front 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 and check the fault code memory!

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

X 

Tightening torque:

Bleed screw in front brake caliper .................. 7 Nm

R22000300

34 1 531

34 1 532

34 1 533

MAX

MIN

R28340090

34.27

Filling and bleeding rear wheel circuit

e

 Attention:

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

–

Place the motorcycle on its centre stand.

•

Open rear wheel-circuit reservoir (1).

•

Remove rear brake pads.

•

Install adapter, BMW No. 34 1 536, instead of 
the outboard brake pad.

•

Install resetting tool, BMW No. 34 1 531, with 
the handle toward the outside in the rear brake 
caliper, press the pistons fully back and secure 
them in this position.

e

 Attention:

To prevent brake fluid entering plugs, do not discon-
nect plugs from the ABS pressure modulator.

•

Screw container, BMW No. 34 1 581, 
onto rear wheel circuit reservoir.

•

Slowly fill container, BMW No. 34 1 581, with 
new brake fluid until it is approximately 1/3 full.

•

Connect the brake bleeding device to the bleed 
screw, but do not switch on the device.

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.

R28340110

1

R28000170

34 1 536

34 1 531

R22000350

34 1 581

34.28

e

 Attention:

The brake fluid must always be visible in the contain-
er, because the piston in the base of the wheel-cir-
cuit reservoir must always be covered by the fluid.
The procedure must be repeated if the fluid drops 
below the “min” level.

•

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

•

Open the bleed screw, while topping up the con-
tainer with new brake fluid if necessary.

•

Pump out the brake fluid with virtually no pres-
sure to begin with, then vary the brake pressure.

L

 Note:

The higher the brake pressure the faster the fluid is 
pumped through the system, which means that the 
level in the wheel-circuit reservoir drops all the more 
rapidly.

•

When the brake fluid is clear and free of bubbles, 
continue pumping until the fluid in the container 
just disappears from view.

•

Close the bleed screw.

•

Release the brake and switch off the ignition.

•

Disconnect the brake bleeding device from the 
bleed screw.

•

Disconnect the container from the wheel-circuit 
reservoir.

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.

MAX

MIN

R28340090