Servicing ceramic brakes — AUDI

Servicing ceramic brakes
The ceramic brake discs must always be checked for damage and wear when renewing the brake pads.
Chapter
“
Assessment of ceramic brake discs
”
Chapter
“
Assessing degree of wear on ceramic brake discs
”
Note
Always install all parts supplied in repair kit.
After renewing brake pads, depress brake pedal firmly several times with vehicle stationary so that the pads are properly seated in their normal operating position.
To draw off brake fluid from brake fluid reservoir use a bleeder bottle which is used only for brake fluid. Brake fluid is poisonous and must NOT be drawn off by sucking through a hose.
Bolts
Caution
Do NOT loosen these bolts.
Note
These bolts do not have to be loosened in order to remove the brake caliper. Loosen bolts
10
to remove the brake caliper.
Retaining spring for brake pads
Guide pin
Brake caliper
If assembly work is required, do not leave caliper hanging from brake hose but secure it to body with wire
With the exception of
“Renewing brake pads”
Chapter
and
“Servicing front brake caliper”
Chapter
, no repairs may be performed on the brake caliper.
Always renew on both sides of axle
Allocation
Chapter
, Brakes
Removing and installing
Chapter
Brake pads
Note
A wire for the wear indicator is fitted to the inner pad.
There is an adhesive foil on the backplates of the outer brake pads. Remove the protective foil before fitting pads.
Before fitting pads, clean guide surfaces and apply a thin coating of polycarbamide grease
Parts catalogue
Different versions available ⇒ Parts catalogue
Always renew on both sides of axle
Removing and installing
Chapter
Checking pad thickness
Maintenance
Booklet
4E
Locating bolt
Tightening torque 5 Nm
Brake disc
Wear limit
Chapter
Always renew on both sides of axle
Detach brake caliper prior to removing
Lightly grease contact surfaces between brake disc and wheel hub with polycarbamide grease G 052 142 A2.
Allocation of brake discs
Chapter
Removing and installing
Chapter
Renewing
Chapter
Splash plate
Bolts for splash plate
Tightening torque 9 Nm
Bolts
Note
Loosen these bolts to remove brake caliper.
Note
Always renew if removed
190 Nm
Brake carrier
Bolt to wheel bearing housing
Bolted onto brake caliper
190 Nm
Brake pistons
WARNING
The brake pistons have different diameters. When re-installing, please make sure that each of the brake pistons is inserted in the correct aperture in the brake caliper. The ceramic inserts on the brake piston act as heat insulators and must not be separated from the brake piston. If the ceramic insert is damaged, the brake pistons must be renewed for safety reasons.
Bolt for bracket
Tightening torque: 25 Nm
Brake line connection at brake pipe
Tightening torque: 12 Nm
Brake hose must not be twisted.
Note
Brake line connection at brake pipe: 12 Nm
Brake pipe in brake caliper: 19 Nm
Brake line
Screw into brake caliper housing
Screw into brake hose, counter hold on brake hose hexagon.
Do not twist hose when fitting
Ensure that lugs are properly seated in grooves in bracket.
Bracket for brake line
Bolt to brake caliper housing
Attach brake line
Brake pipe in brake caliper
Tightening torque: 19 Nm
Note
Brake pipe in brake caliper: 19 Nm
Brake line connection at brake pipe: 12 Nm
Bolt for guide pin
30 Nm
Damper spring
2 fitted on each brake caliper
Detaching and attaching
Chapter