47-43
 
  
7 - 
Brake fluid reservoir cap 
8 - 
Fluid supply hose 
From brake fluid reservoir to clutch master 
cylinder 
9 - 
Seal Install in groove in brake master cylinderReplace after removing brake master 
cylinder 
10 - 
Brake servo Removing and installing   page 47
-46
Adjusting ball head   Fig. 1
  Functional check:
 - With engine switched off, depress brake 
pedal firmly several times (to deplete 
vacuum in brake servo). 
 - Depress and hold brake pedal with 
average foot pressure and start engine. If 
servo unit is working properly, pedal will 
be felt to give slightly under foot (servo 
assistance becomes effective). 
  If malfunctioning:
  - Replace as complete unit only.
Pa
ge 3 of 11 Brake master c
ylinder with 25.4 mm 
(0.999 in.
) diameter 
piston and brake servo, com
ponent summar
y
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.SU03.47.7