00.34
Bleeding/renewing the brake fluid
using the handbrake lever/brake
pedaln
(Inspection III, IV)
Bleeding front brake circuit/renewing
fluid
•
Remove front brake pads.
e Caution:
Do not tilt the brake calipers when removing. There
is a risk of dmage to the brake pads.
•
Unscrew brake fluid reservoir cover and remove
together with diaphragm.
•
Add brake fluid up to the MAX mark.
e Caution:
During the bleeding process, brake fluid level must
not drop below the MIN mark, or else air will be
drawn into the brake system.
If this occurs, repeat the bleeding operation.
•
Connect a vessel to the brake caliper to trap
brake fluid as it emerges from the bleed screw;
slacken off the bleed plug by a half-turn.
•
Press the brake pistons fully back with the piston
resetting tool, BMW No. 34 1 500.
•
Remove the piston resetting tool and insert
spacer, BMW No. 34 1 520, in its place.
•
Press the pistons back in the second brake cali-
per, and leave the resetting tool in position.
•
Apply handbrake lever several times until brake
pressure can be detected.
•
Maintain pressure on handbrake lever, then open
bleed screw while maintaining firm pressure on
the handbrake lever.
e Caution:
Do not release the lever/pedal until the bleed screw
has been closed.
•
Close bleed screw and release handbrake lever.
•
Allow brake fluid to emerge from both brake cal-
ipers in succession until it is clear and free from
bubbles.
•
Close bleed screw.
•
Install brake pads/brake calipers.
•
Brake fluid level = MAX mark.
•
Fit diaphragm and reservoir cover.
•
Carefully tighten retaining screws.
•
Turn handlebar from lock to lock, actuating brake
several times while doing so.
•
Perform a functional check on the brake system.
Bleeding rear brake circuit/renewing
brake fluid
•
[RS/GS] The rear brake caliper does not have to
be removed, nor the pistons pushed back.
•
[R/RT] To bleed, slacken off the brake caliper
and position it so that the bleed nipple is at the
highest point.
•
After this, the procedure is the same as for
bleeding/renewing the front brake fluid.
34 1 500
LT000100
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