RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
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Vacuum Brake Booster: Service and Repair
Tandem Brake Booster/Brake Master Cylinder Assembly Overview
Tandem Brake Booster/Brake Master Cylinder Assembly Overview
‹› Brake master cylinders can no longer be disassembled, i.e. no provision is made for servicing.
‹› Use only new brake fluid. Observe the information on the brake fluid reservoir!
‹› Assignment of the brake line connections.
1 - - a - Vacuum hose
‹› On gasoline engines the vacuum required is taken from the intake manifold and/or a mechanical vacuum pump.
‹› Insert into the brake booster unit
1 - - b - Vacuum hose
‹› On gasoline engines the vacuum required is taken from the intake manifold and/or a mechanical vacuum pump.
‹› An additional electrical vacuum pump is installed on vehicles where vacuum is taken from intake manifold only
‹› Insert into the brake booster unit
2 - Trunnion bolt, 8 Nm
‹› Install as far as the stop
