Touareg V8-4.2L (BHX) (2004)
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Brake Master Cylinder: Service and Repair
Brake Master Cylinder
Brake Master Cylinder
Special tools, testers and auxiliary items required
‹› Brake charger/bleeder unit (VAS 5234)
Removing
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Remove plenum chamber cover.
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Remove engine compartment seal and cover strip in area of brake booster.
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Remove facing wall of plenum chamber.
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Place sufficient lint free cloths in plenum chamber in the area of the brake master cylinder.
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Remove as much brake fluid as possible from the brake fluid reservoir using the brake charger/bleeder unit (VAS 5234) or suction adapters (VAG
1869/4).
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Disconnect connector off float warning indicator sensor.
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Disconnect connector from brake pressure sensor.
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Remove brake fluid reservoir, press the engagement straps toward outside at reservoir and simultaneously pull brake fluid reservoir out of sealing
plugs.
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Remove left front brake line from retainer on master brake cylinder.
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Disconnect brake lines from master brake cylinder and seal brake lines using sealing plugs (1H0 698 311 A) from repair kit.
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Remove brake master cylinder nuts.
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Carefully take brake master cylinder out of brake booster.
Installing
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Installation is performed in the reverse sequence.
Observe the following points when installing:
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When installing together the brake master cylinder and brake booster, make sure that the push rod is correctly located in the brake master
cylinder.
O-ring between master brake cylinder and brake booster is present.
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Bleed the brake system. Refer to --> [ Brake System Bleeding General Information ] See: Brake Bleeding/Service and Repair/Brake System
Bleeding General Information.
After bleeding brake system, basic setting for brake pressure sensor 1 (G201) must be performed.
(VAS 5051), connecting and selecting functions, refer to --> [ VAS 5051, Connecting and Selecting Functions ] See: Antilock Brakes / Traction
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures.
