Peugeot 406

since 1996 release

Repair and operation of the car

Peugeot 406
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling systems, heating and ventilation
+ 5. Fuel system
+ 6. System of ignition
+ 7. Coupling
+ 8. Transmissions
+ 9. Power shafts
- 10. Brake system
   10.1. Technical data
   10.2. Pumping of the hydraulic brake system
   10.3. Brake pipelines and hoses
   10.4. Replacement of front brake shoes
   10.5. Replacement of back brake shoes
   10.6. Replacement of back brake shoes on drum brakes
   10.7. Forward brake disk
   10.8. Back brake disk
   10.9. Back brake drum
   10:10. Support of a forward brake
   10:11. Support of a back wheel
   10:12. Back brake cylinder
   10:13. Main brake cylinder
   10:14. Brake pedal
   10:15. Vacuum amplifier of brakes
   10:16. Unilateral valve of the vacuum amplifier of brakes
   10:17. Adjustment of the emergency brake
   10:18. Lever of the emergency brake
   10:19. Cable of the emergency brake
   10:20. Brake shoes of the emergency brake (model with disk brakes)
   10:21. The valve of adjustment of pressure in the brake system
   10:22. Stoplight switch
   10:23. Anti-blocking system of brakes (ABS)
   10:24. The vacuum pump (cars with the diesel engine)
   10:25. Check of the vacuum pump on cars with diesel engines
+ 11. Suspension bracket and steering
+ 12. Body
+ 13. Electric equipment
+ 14. Main malfunctions

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10.2. Pumping of the hydraulic brake system


Pumping of a hydraulic actuator of brakes is necessary for removal of air which considerably reduces efficiency of braking. Air can get to a hydraulic actuator owing to depressurization of system at repair, replacement of separate knots or brake fluid.

Point the increased course of a pedal of a brake and its "softness" to availability of air in the drive. Before removal of air check tightness of all knots of the drive of brakes and their connections.

Carry out pumping of all system of the drive of brakes in the following sequence:

 – right forward wheel;
 – left forward wheel;
 – right back wheel;
 – left back wheel.

1. Remove a dustproof cap from the union of pumping of the wheel cylinder, clear it and put on it a pure transparent hose which other end lower in the capacity which is partially filled with brake fluid. Capacity has to be at least 300 mm above the pumping union. Thanks to it hit of air in the cylinder through a pumping union carving is prevented.
2. Sharply press a pedal of a brake of 3-5 times with an interval 2–3 sec., unscrew half way the pumping union at the pressed pedal. Continuing to press a pedal, force out the liquid which is in system together with air through a hose in capacity.
3. After the pedal reaches extreme forward situation and the liquid effluence through a hose will stop, screw the pumping union to the full. Repeat these operations, the air outlet from a hose will not stop yet.
4. Holding a pedal in the pressed situation, screw up the pumping union against the stop and remove a hose.
5. Wipe the union of pumping and establish a protective cap.
6. Repeat these operations for other wheels.


During removal of air constantly you monitor availability of brake fluid in a tank, without allowing an exposure of its bottom since at the same time air will get to system again.

7. At absence the pedal has to pass about a half of the course in system of brakes of air. To exclude influence of the vacuum amplifier on pumping of brakes, you make removal of air at the idle engine.