Bleeding Brake System - Audi A6 2005 Workshop Manual

Audi A6 2005 ➤ , Audi A6 Avant 2005 ➤
Brake system - Edition 04.2019
8

Bleeding brake system

⇒ "8.1 Bleeding hydraulic system with brake filling and bleeding
equipment", page 155
⇒ "8.2 Bleeding hydraulic system without brake filling and bleed‐
ing equipment", page 157
Note
The brake system cannot be completely bled if the older ver‐
♦
sion of the pressure sensor (ACC sensor) (1J0...) is installed.
Replace the pressure sensor for ACC with the new version. ⇒
ETKA
Removing and installing brake pressure sender
♦
WARNING
♦ Brake fluid must NOT come into contact with fluids con‐
taining mineral oils (oil, petrol, cleaning agents). Mineral
oils damage the plugs and sleeves in the brake system.
♦ Brake fluid is poisonous and must NOT be drawn off by
sucking through a hose. Because of its caustic properties
it must also not come into contact with paintwork.
♦ Brake fluid is hygroscopic, i.e. it absorbs moisture from the
surrounding air. It must therefore always be stored in air-
tight containers.
♦ Brake fluid flushed out during the bleeding process must
not be re-used and must be disposed of in the proper
manner.
Note
Only use new brake fluid conforming to US standard FMVSS
♦
116 DOT 4.
Genuine VW/Audi brake fluid conforms to this specification.
♦
Do not use liquids containing silicone.
♦
Avoid contamination of brake fluid with any dirt particles or bits
♦
of fluff (e.g. from cleaning cloths etc.).
Rinse off spillages using plenty of water.
♦
When the system is open, do not work with compressed air
♦
and do not move the vehicle.
During the final road test, ensure that at least one ABS-con‐
♦
trolled brake application is performed (pulsations must be felt
at the brake pedal).
The brake system warning lamp flashes if the level of the brake
♦
fluid is too low, in case of a malfunction of the ABS or a mal‐
function of the electronic parking brake.
154
Rep. gr.47 - Brakes - hydraulics
⇒ page 54