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>> Air removal from a hydraulic actuator of brake system
Air hit in a hydraulic actuator brake reduces overall performance of brake mechanisms. Air can get to a hydraulic actuator owing to system depressurization at repair or replacement of separate knots, and also replacement of brake liquid. To availability of air in a drive points increased, in comparison with usual, a course of a pedal of a brake. Before removal of air check tightness of all knots of a drive of brakes and their connections.
Air removal from a hydraulic actuator of brake system carry out in the following order:
delete air consistently from wheels: the right back, left back, right forward, left forward:
cнимите the contact socket from the sensor of level of brake liquid on a tank;
remove and put aside a tank cover;
remove a dustproof cap from the union of the valve of the wheel cylinder. Clear the valve of pumping and put on it the pure transparent hose which other end lower in the capacity which has been partially filled with brake liquid. The capacity should be at least on 300 mm above the pumping union. Thanks to it air hit in the cylinder through a carving of the union of pumping is prevented;
sharply press a pedal of a brake of 3-5 times with an interval 2–3 with and at the pressed pedal unscrew on a half of turn the pumping valve. Continuing to press a pedal, force out the liquid which was in system together with air through a hose in capacity. After the pedal will rest against a floor and a liquid effluence through a hose will stop, screw up the pumping valve against the stop;
repeat operation until the air outlet from a hose will stop;
holding a pedal in the pressed situation, screw up the valve against the stop and remove a hose;
wipe the valve of pumping and establish a protective cap;
repeat the same operations for other wheels;
at removal of air supervise liquid level in a tank. Do not allow, that liquid is completely cunning from a tank as thus air again will get to system. At absence the pedal of a brake should pass about a half of the course in a drive of brakes of air. To exclude influence of the vacuum amplifier, pumping of system carry out at the idle engine;
after pumping of brake system establish a cover on a tank and connect the contact socket the socket.
Air removal from a hydraulic actuator of brake system of the cars equipped with ABS. Operation of pumping of brakes on the cars equipped with ABS, in general is similar described, differing from it only a number of nuances.
Air removal from a hydraulic actuator carry out in the following order:
delete air at first from lobbies, then from back wheels;
for pressure reduction in hydraulic brake system when pumping lobbies and back brakes press a brake pedal twenty times with the switched-off ignition. Fill a tank of the main brake cylinder to top and be convinced that liquid level when pumping does not go down below the minimum label;
for pumping of back brakes press a brake pedal twenty times with the switched-off ignition and hold her in the pressed situation. Include ignition, weaken the corresponding back valve of pumping of brakes and hold him in this situation until from following brake liquid air vials then screw up the valve of pumping will not disappear and switch off ignition;
do not allow continuous operation of the pump more than 2 mines for once. If pumping needs more time, switch off the pump and continue operation in 10 minutes.