Passat Syncro Wagon V6-2771cc 2.8L DOHC (AHA) (1998)
Brake Master Cylinder: Service and Repair
Brake Booster/Brake Master Cylinder, Overview
Brake booster/brake master cylinder, removing and installing
Note:
-
Brake master cylinders and brake boosters from different manufacturers are used. Complete master cylinders and brake boosters can be replaced
independently of each other
-
Brake master cylinders can no longer be disassembled, i.e. servicing is not possible.
-
Use only new brake fluid. Observe in formation on brake fluid reservoir!
-
Brake line connection.
1. T 45 torx socket head bolt
-
25 Nm (18 ft. lbs.)
2. Self-locking nut
-
49 Nm (36 ft. lbs.)
3. Master cylinder
-
23.81 mm (0.93 inch)
-
Cannot be repaired. If inoperative replace complete.
-
Removing and installing. See: Power Brake Assist/Vacuum Brake Booster/Service and Repair/Brake Booster, Removing and Installing
4. Brake line
-
Master brake cylinder/secondary piston circuit to hydraulic unit
5. Brake line
-
Brake master cylinder/primary piston circuit to hydraulic unit
6. Sealing ring
-
Always replace
7. Brake booster
-
Adjust ball plunger refer to Fig. 1
-
On gas engines vacuum source is from intake manifold.
-
On Diesel engines vacuum source is from vacuum pump.
-
Functional check
-
With engine switched off, press brake pedal firmly several times (to exhaust booster vacuum).
-
Now press brake pedal with normal foot pressure, hold pressure and start engine. If booster is working properly, pedal will give slightly
under foot (booster assist becomes effective).
-
If inoperative replace.
-
One way valve -9- (in vacuum hose)
-
Removing and installing