34.5
34 11 521 Disassembling and assem-
bling front brake caliper
e Attention:
Do not separate the brake caliper halves!
– Integral ABS Drain front wheel circuit (
a 34.16).
– Remove the brake caliper.
•
Remove the brake pads.
•
Close the bleed screw.
•
Secure two opposing brake pistons with
spacer, BMW No. 34 1 520.
•
Insert a piece of cloth between the two brake pis-
tons not secured by the resetting tool.
e Attention:
Do not insert your fingers between the pistons; risk
of injury.
•
Carefully press out brake pistons (1), using a
compressed air gun at the brake line connection.
•
Remove the two sealing rings from each brake
cylinder bore.
•
Inspect the brake caliper piston for hairline
cracks, score-marks and other damage.
•
Coat new sealing rings (2, 3) with brake fluid and
install.
•
Coat brake caliper pistons (1) with brake fluid
and insert.
e Attention:
Keep the brake pistons parallel with their bores
when installing.
•
Remove and install the other two brake pistons
in the same way.
•
Using piston resetting tool, BMWNo.341531,
press the pistons fully back.
•
Install brake caliper.
•
Integral ABS Fill and bleed front wheel circuit
(
a 34.23).
X Tightening torque:
Bleed screw to brake caliper.......................... 7 Nm
Grub screw in front brake caliper ................... 7 Nm
Colour code:
Brake pads/brake calipers ..............................white
S340220
1
2
3
34 1 531
34 1 532
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