A4 Sedan L4-1.8L Turbo (AWM) (2001)
Brake Master Cylinder: Service and Repair
With 23.81mm (0.937 Inch) Diameter Piston
Special tools and equipment
Sealing plugs from repair kit, Part No. 1 HO 698 31 1A
CAUTION: Part numbers are listed here for reference only. Always check with your Parts supplier for the latest information.
Removing
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Attach bleeder hose and bleeder bottle to left front brake caliper bleeder screw and open bleeder screw.
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Operate brake pedal to pump out as much brake fluid as possible.
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Close left-front bleeder screw.
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Cover engine compartment to catch any spilled brake fluid.
CAUTION: Brake fluid must not be allowed to come into contact with paint work because of its caustic effect.
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On vehicles with manual transmission, disconnect clutch master cylinder supply hose -1- and seal with plug.
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Disconnect harness connector from brake fluid level warning switch -2-.
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Disconnect brake lines -1- on brake master cylinder and seal brake lines and threaded holes using plugs from repair kit.
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Remove brake master cylinder mounting nuts -2-.
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Carefully remove brake master cylinder from brake servo.
Installing
When installing, note the points:
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When installing brake master cylinder onto brake servo, make sure push rod is correctly located in brake master cylinder.
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Apply slight pressure to brake pedal to move push rod toward brake master cylinder; this makes it easier to guide brake master cylinder onto push
rod.
Bleeding clutch hydraulics
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Connect US1116 brake bleeder but do not switch on yet.
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Open bleeder screw on clutch slave cylinder.
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Attach collector bottle hose.
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Switch on bleeder unit and allow approximately 100 cc (6 oz.) of brake fluid to flow out of clutch slave cylinder.
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Close bleeder screw.
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Bleed brake system.