Brake Master Cylinder, TT RS

Brake Master Cylinder, TT RS

Removing

Special tools, testers and auxiliary items required

• Torque wrench (V.A.G 1331)

• Brake filler/bleeder unit (V.A.G 1869)

• Brake filler/bleeder unit suction adapter (V.A.G 1869/4)

• Brake filler/bleeder unit (VAS 5234)

• Sealing plugs repair kit, Part no. (1H0 698 311 A)

- Remove the engine cover - 1 -.






- Remove bolts - arrows - and remove the air guide.






- Remove the bolts - arrows - and remove the air filter housing.






- On the TT RS remove the brake lamp switch. Refer to => [ Brake Lamp Switch, TT RS ] Brake Lamp Switch, TT RS.

- To protect against escaping brake fluid, place enough lint-free cloths in the area below the master brake cylinder.

- Extract as much brake fluid as possible from brake fluid reservoir using brake charger/bleeder unit (VAS 5234) or extraction device upgrade kit (V.A.G 1869/4).

• Brake fluid must never come into contact with fluids containing mineral oils (oil, gas, cleaning solutions). Mineral oil damages the sealing plugs and boots of the brake system.

• Brake fluid is poisonous. NEVER siphon brake fluid with your mouth! Also due to its corrosive effect, brake fluid must not come into contact with paintwork.

• Observe disposal regulations.

- Connect connector on brake fluid level warning switch.

- Disconnect brake lines - 3 - at brake master cylinder and seal brake lines with sealing plugs from repair kit.






- Remove brake master cylinder nuts - 1 -.

- Remove heat shield.

- Unclip brake fluid reservoir at Pos. - 2 - and pull upward and off.

- Remove brake master cylinder from brake booster.

Installing

Installation is the reverse of removal, with special attention to the following:

- Replace sealing ring between brake master cylinder and brake booster.

- When replacing brake master cylinder, ensure pressure rod in brake booster is seated correctly.

- Use new nuts - 1 -. Note torque.






- Press brake pedal down a bit, this allows the brake master cylinder to be guided into pressure rod more easily.

- Install brake lines - 3 - on brake master cylinder. Note torque.

- On the TT RS install the brake lamp switch. Refer to => [ Brake Lamp Switch, TT RS ] Brake Lamp Switch, TT RS.

- Install the brake fluid reservoir => [ Brake Fluid Reservoir ] Service and Repair.

- Install the air filter housing and tighten the bolts - arrows -.






- Install the air guide and tighten the bolts - arrows -.






- Install the engine cover.

- Brake System: ABS/ESP Mark 60, bleeding => [ Brake System Bleeding ] Brake System Bleeding.

- Initiate brake pressure sensor basic setting.

Use Vehicle Diagnosis, Testing and Information System (VAS 505x) for this.

- Perform ESP driving and system test.

Vehicle diagnostic, test and information system (VAS 505x).

- Under chassis

- Brake system (Repair Group 01; 45)

- 01 - On Board Diagnostic (OBD) capable systems

- 03- Brake electronics ABS/ESP Mark 60 si

- J104- ABS/ASR/ESP Control Module, Functions

Make sure the brakes are working correctly before driving the vehicle for the first time.