A8L Quattro Sedan V8-4.2L (AUX) (2001)
Brake Master Cylinder: Service and Repair
Brake Booster/Dual Master Cylinder, Assembly Overview
Note:
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Brake master cylinders cannot be disassembled, i.e. they are not intended to be serviced.
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Use only new brake fluid. Refer to label on brake fluid reservoir.
Allocation of brake line connections:
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Refer to Hydraulic Control Assembly.
1. Master cylinder, Diameter = 25.4 mm
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Cannot be repaired. Replace as complete unit if malfunctioning.
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Removing and installing.
2. T45 Torx, 25 Nm
3. Flange nut, 50 Nm
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Always replace
4. Sealing plugs
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Moisten with brake fluid and insert in master cylinder
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Press brake fluid reservoir into gasket
5. Brake fluid reservoir with floating brake fluid level warning switch
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Function test
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Remove cover and press onto visible sieve using hand with ignition switched on. Warning lamp in instrument cluster lights up and an
acoustic warning signal is sounded.
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Removing and installing; Refer to Brake Master Cylinder.