VW Passat repair


+ 1. Ekspluatatsiiya of the car
+ 2. Maintenance
+ 3. Engines
+ 4. Cooling system
+ 5. Power supply system
+ 6. Ignition system
+ 7. Coupling
+ 8. Transmission
+ 9. Drive of forward wheels
+ 10. Suspension brackets
+ 11. Steering
- 12. Brake system
   12.1. Technical characteristics
   12.2. General information
   + 12.3. Maintenance
   + 12.4. Replacement of forward brake shoes
   12.5. Replacement of a forward support
   12.6. Replacement of a forward brake disk
   12.7. Replacement of a brake drum and back brake shoes on brakes of drum-type type
   12.8. Wheel cylinder of the back brake mechanism
   12.9. Replacement of brake shoes on back disk brakes
   12.10. Replacement of a support of the back brake mechanism
   12.11. Pressure regulator
   12.12. Main brake cylinder
   12.13. Tubes and hoses of brake system
   12.14. Air removal from a hydraulic actuator of brake system
   + 12.15. Anti-blocking system of brakes (ABS)
   12.16. Brake pedal
   12.17. Lever of the parking brake
   12.18. Cables of the parking brake
   12.19. Adjustment of the parking brake
   12.20. Vacuum amplifier of brakes
   12.21. Stoplight switch
   12.22. Elimination of noise of brakes
+ 13. Wheels and tires
+ 14. Systems of heating, ventilation and conditioning
+ 15. Electric equipment
+ 16. Body
+ 17. Electric circuits


Repair B3-B4/Passat B3-B4 Volkswagen Passat>> Brake system>> General information
According to the destination and to carried-out functions the brake system of the car has conditional division on working, spare, lay and emergency.
The working brake system provides regulation of speed of the car and its stop with necessary efficiency.
The spare system provides a car stop with necessary efficiency at failure of working brake system.
The lay system serves for car keeping in motionless, are rather expensive, a condition. This system can be used and as emergency at failure of working brake system.
On the car the working brake system with a hydraulic drive and diagonal division of contours is applied that considerably increases safety of driving. At refusal of one of contours as spare brake system the second contour providing a stop of the car with sufficient efficiency is used.
The brake system consists of the main brake cylinder, the vacuum amplifier of brakes, disk brakes on forward wheels and drum-type or disk brakes on back wheels. On forward wheels not ventilated brake disks, and on cars with engines over 79 kW (107 h.p.) — ventilated brake disks are established. On back wheels being self-established drum-type brakes, and on cars with engines over 79 kW (107 h.p.) — disk are applied.
The tank of the main brake cylinder is in a motor compartment, supplying brake system and coupling by brake liquid. The vacuum amplifier of brakes reduces effort on a brake pedal, facilitating thereby driving.
The brake mechanism of a forward wheel disk with a mobile bracket. It is well entered in a wheel, has a small amount of details, including consolidations, and small weight. As in the course of heatreturn one cylinder is involved only, brake liquid heats up less.
The parking brake influences back wheels through a hummock drive. Blocks of lobbies and back brakes are regulated automatically.
Some models of cars are equipped with ABS including the hydraulic modulator, the electronic control unit, the relay and sensors of speed of rotation of wheels. The system prevents blocking of wheels at sharp braking. About a condition of brake system warn control lamps of the parking brake, low level of brake liquid and ABS system.

       PREVENTION
At work of brake shoes the brake dust which contains asbestos, unhealthy is formed. Therefore when cleaning brake shoes do not use the compressed air and try not to breathe air from a working zone.

       PREVENTION
At movement on the damp road at the expense of centrifugal force water is dumped from brake disks, however on them there is a thin film from fats, силиконов, the remains of rubber, greasing and the dirt, reducing efficiency of braking. Therefore during a car stop after movement in the rain dry brakes in pressing a brake pedal.

       PREVENTION
New brake shoes should pass the period "extra earnings". On the first 200 km of run avoid sharp braking. Korrodirovannye brake disks cause the vibrating effect which is not disappearing and at long braking when braking. It is necessary to replace such brake disks.