Overview - Brake Booster/Brake Master Cylinder
WARNING: This page is about a different car, the 2016 Volkswagen Beetle, 2015 Volkswagen Beetle, 2014 Volkswagen Beetle, 2013 Volkswagen Beetle, and 2012 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Use only new brake fluid. Observe information on brake fluid reservoir!
- Pedal Assembly
- Removing and installing. Refer to BRAKE PEDAL .
- Nut
- 25 Nm
- Always replace if removed
- Note the tightening sequence. Refer to Installing .
- Seal
- For the brake booster
- Brake Booster
- On gasoline engines, the required vacuum is supplied either by the intake manifold or by a vacuum pump.
- Functional check:
-- With engine switched off, depress brake pedal firmly several times (to exhaust the vacuum in the unit).
-- Depress and hold brake pedal with average foot pressure and start engine. If brake booster is working properly, pedal will be felt to give noticeably under foot (booster assistance becomes effective).
- Replace as a unit in the event of malfunction (previously, check all vacuum lines).
- Removing and installing, vehicles with 5-cylinder gasoline engines. Refer to BRAKE BOOSTER, WITH 5-CYLINDER GASOLINE ENGINE .
- Removing and installing, vehicles with 4-cylinder gasoline engines. Refer to BRAKE BOOSTER, WITH 4-CYLINDER GASOLINE ENGINE .
- Removing and installing, vehicles with 4-cylinder diesel engines. Refer to BRAKE BOOSTER, WITH 4-CYLINDER DIESEL ENGINE .
- Allocation.
- Check the brake booster vacuum system for faults. Refer to VACUUM SYSTEM, CHECKING
- Seal
- Brake Master Cylinder
- Allocation.
- Cannot be serviced. Replace as complete unit if malfunctioning.
- Removing and installing, vehicles with 5-cylinder gasoline engines. Refer to MASTER BRAKE CYLINDER, WITH 5-CYLINDER GASOLINE ENGINE .
- Removing and installing, vehicles with 4-cylinder gasoline engines. Refer to MASTER BRAKE CYLINDER, WITH 4-CYLINDER GASOLINE ENGINE .
- Removing and installing, vehicles with 4-cylinder diesel engines. Refer to MASTER BRAKE CYLINDER, WITH 4-CYLINDER DIESEL ENGINE .
- Nut
- 25 Nm
- Always replace if removed
- Bolt
- 5 Nm
- Brake Lamp Switch -F-
- Including the Brake Pedal Switch -F47-
- Removing and installing. Refer to BRAKE LAMP SWITCH .
- Brake Line
- 14 Nm
- Brake master cylinder/secondary piston circuit to the ABS Hydraulic Unit -N55-
- Identification: 6.5 mm diameter and tube fitting with a M12 x 1 thread
- Brake Line
- 14 Nm
- Brake master cylinder/primary piston circuit to the ABS Hydraulic Unit -N55-
- Identification: 6.5 mm diameter and tube fitting with a M12 x 1 thread
- Sealing Plug
- Connection for vacuum hose
- Sealing Plug
- Moisten with brake fluid and press into brake fluid reservoir
- Mounting Pin
- Push to right to remove the brake fluid reservoir
- Brake Fluid Reservoir
- Brake Fluid. Refer to DESCRIPTION AND OPERATION .
- Removing and installing. Refer to BRAKE FLUID RESERVOIR .
- Cap
- With Brake Fluid Level Warning Switch -F34-
- Vacuum Line
- Insert into brake booster
- Allocation.
- Check if brake booster is malfunctioning. Refer to VACUUM SYSTEM, CHECKING .
- Vacuum Sensor -G608-
- Vacuum Sensor -G608- for vehicles with HBB (hydraulic brake booster)
- Vacuum Sensor -G608-, removing and installing. Refer to Vacuum Sensor -G608- .
- Allocation.