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NOTICE
Risk of damage due to corrosion.
– Make sure that no brake fluid gets onto electrical contacts.
– Place sufficient lint-free cleaning cloths in area of electrical
connectors.
– First, mark the two brake lines -5- and -6- , and unscrew
them from the hydraulic unit.
– Seal threaded holes with sealing plugs.
– Mark brake lines (brake calipers/wheel brake cylinders) -1-
to -4- , unscrew them, and seal threaded holes.
– Seal brake lines with engine bung set -VAS 6122- .
Note
Fit dust caps from bleeder screws on brake lines as an alterna‐
tive.
– Pull hydraulic unit and control unit -1- together with brack‐
et -3- and rubber mountings -4- upwards in direction of
-arrow- .
Installing
Install in reverse order of removal, observing the following:
♦ The hydraulic unit is pre-filled. Do not remove sealing plugs
on the hydraulic unit until the corresponding brake line is
installed to ensure a sufficient fill level and venting.
♦ When installing the hydraulic unit, make sure that the rubber
mountings are not pressed out of the bracket.
– Use assembly tool -V.A.G 1410/8- to fit brake lines in the
sequence -1- through -6- .
ID.4 2021 ➤
Brake system - Edition 07.2021
3. Control unit and hydraulic unit
21
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