VW Passat B5

since 1996 release

Repair and operation of the car



Foltsvagen Passat B5
+ Maintenance instruction
+ 1. Maintenance
+ 2. Engines
+ 3. Cooling system
+ 4. Fuel system
+ 5. Engine management
+ 6. Exhaust system
- 7. Transmission
   - 7.1.2. Clutch plate
      7.1.3. Removal of air from the hydraulic drive of coupling
      7.1.4. Main malfunctions of coupling
   + 7.2. Mechanical transmission
   + 7.3. Automatic transmissions
+ 8. Running gear
+ 9. Steering
+ 10. Brake system
+ 11. Body
+ 12. Heating, ventilation
+ 13. Electric equipment







7.1.3. Removal of air from the hydraulic drive of coupling

GENERAL INFORMATION

Prevention

The brake fluid used in hydraulic system of coupling is poisonous therefore at its hit on skin it is necessary to wash out immediately this place a plentiful amount of water. If liquid got into eyes or in an organism, it is necessary to see a doctor immediately. Some liquids have property to ignite easily and can light up even from contact with hot knots of the car. Besides, the liquid used in hydraulic system of coupling dissolves paint and plastic therefore at hit of liquid on a paint and varnish covering of the car wash out it a plentiful amount of water. Also this liquid is hygroscopic, that is absorbs moisture from air and therefore the liquid which is stored a long time in open ware is not recommended to be used.


Any hydraulic system works normally and reliably if air is removed from hydraulic liquid in system.
Prevention

During removal of air add only pure liquid of the required type. Never reuse liquid which flowed out from hydraulic system of coupling.

If in hydraulic system incidentally there was a mixing of liquids of various types, remove liquid from hydraulic system, wash out system pure liquid of the required type and establish new sealing rings.


At continuous leak of liquid of hydraulic system or hit in hydraulic system of air define the reason and the place of leak and eliminate damage.

PERFORMANCE ORDER
1. Lift a forward part of the car and fix on supports.
2. Remove the lower mudguard of the engine.
3. Check that connections гидравличес which tube and a hose of coupling are reliably tightened, and the pumping union on a back part of the working cylinder of coupling is screwed up. Remove dustproof caps from unions of pumping of the working cylinder of coupling and a support of a forward brake and clear all traces of dirt about unions.
4. Dress a transparent hose on the union of pumping of a support of a forward brake.
5. Fill a hose with brake fluid. For this purpose press a pedal of a brake and unscrew on a half of a turn the pumping union at the pressed pedal. Continuing to press a pedal, force out the liquid which is in system in a transparent hose. After the pedal will reach extreme forward situation and the liquid effluence in a hose will stop, screw the pumping union to the full. Repeat these operations before filling of a hose with brake fluid. Support a transparent hose in order that from it brake fluid did not pour out.
6. When performing this operation do not allow the level of brake fluid to fall below the middle of a tank.
7. Put on the free second end of a transparent hose the union of pumping of the working cylinder of coupling and open both unions of pumping.
8. Press a pedal of a brake and, holding a pedal of pressed, screw up against the stop the pumping union on a brake support. Repeat this operation until in a popolnitelny tank of the brake system vials of air cease to appear. When performing this operation constantly add fresh brake fluid.
9. Screw up pumping unions against the stop and remove from them a transparent hose.
10. Wipe unions of pumping and establish on them protective caps.
11. Check smoothness of the course of a pedal of coupling. If when pressing the pedal of coupling moves with breakthroughs, so at hydraulic system of coupling there is an air. If after repeated removal of air the coupling pedal moves unevenly again, so sealing rings of the main or working cylinder of coupling are worn-out.
12. Establish the lower mudguard of the engine and lower the car.