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>> Wheel cylinder of the back brake mechanism
Removal of the wheel cylinder carry out in the following order:
cнимите brake drum;
press a brake hose between a back axis and the bottom, a suitable clip. Thus watch, that the hose was not damaged;
weaken a cap nut of a brake hose on a reverse side of the wheel cylinder;
cap head unscrew bolts of fastening of the wheel cylinder;

Fig. 12.12. Wheel cylinder of the back brake mechanism: 1–bolt of fastening of the wheel cylinder; 2–cap of the valve of pumping; 3–pumping union; 4–working brake cylinder; 5–spring; 6–cuff; 7–piston; 8–protective cover


remove the wheel brake cylinder (fig. 12.12) and disconnect it from a brake hose. To avoid loss of brake liquid and dirt hit in a hose, muffle it a stopper.
Dismantling and assembly of the wheel cylinder of the back brake mechanism carry out in the following order:
If the wheel brake cylinder is not subject to replacement, it can be disassembled without preliminary removal. Previously remove brake shoes. Replacement of the wheel cylinder is necessary, if the piston in the cylinder has the complicated course or at on it there are characteristic flutes or corrosion traces that negatively affects work of brakes.
clear an external surface of the brake cylinder. Remove dustproof covers from the cylinder ends;
take from the brake cylinder both of the piston with cuffs;
take from the brake cylinder a spring and wash out details in pure brake liquid. Check a condition of pistons and the brake cylinder on wear, corrosion and other defects;
establish cuffs on the piston so that working edges of consolidation were turned in the direction of pressure of brake liquid;
insert the left piston into the wheel cylinder;
insert a spring on the right, unscrew the union of pumping and insert the second piston;
establish dustproof caps.
Installation of the wheel cylinder of the back brake mechanism carry out in the following order:
wipe a brake board and remove a stopper from a brake hose;
screw the brake cylinder on a brake hose and establish the cylinder on a brake board;
fix the cylinder bolts;
establish brake shoes and a brake drum;
remove a clip from a brake hose;
remove air from brake system. Thus, as a rule, it is enough to pump over only that cylinder which was subject to replacement;
to adjust back brake mechanisms with force press a brake pedal.