Audi A3

since 1997 of release

Repair and car operation



Audi A3
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ the Power supply system and production of the fulfilled gases
+ engine Electric equipment
+ Manual box of gear shifting
+ Automatic transmission and models with a full drive
- Coupling and power shafts
   - Coupling
      Removal, installation and coupling check
      Air removal from hydrosystem of a drive of coupling
   + Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Elektroskhema







Air removal from hydrosystem of a drive of coupling

GENERAL INFORMATION

It is necessary to remove air from hydrosystem of a drive of coupling, if coupling badly separates at transfer change, the pedal of coupling comes back slowly or does not come back back or if the hydrosystem was opened.

As the hydrosystem of coupling works at brake liquid, it is necessary to read subsection air Removal from brake system.
ATTENTION

Brake liquid is poisonous. At all do not suck away liquid a mouth through a hose. Liquid store only in capacities, casual access in which is excluded.


PERFORMANCE ORDER
1. Lift and establish the car on supports. Remove the bottom cover of an impellent compartment, thus address to the subsection Removal and installation of the bottom cover of an impellent compartment.
2. Check level of brake liquid in the general tank. If necessary add to Max mark.
3. Remove boots from the union of removal of air on the working cylinder and on a forward left support.
4. Carefully turn on and wrap the union.
5. Put on a transparent hose the union on a support.
6. Fill a hose with brake liquid. For this purpose open the union on a support. Ask the assistant to press slowly a pedal of coupling and to press in this situation. Close the union and release a pedal. Then the union open again and again press a coupling pedal. Repeat process until the hose will not be filled with liquid. Press a hose a finger that liquid did not pour out.
ATTENTION

Do not allow too essential decrease in level of liquid in the tank. Otherwise add liquid....


7. Put on the free end of a hose the union of the working cylinder and open both unions.
8. Press a brake pedal, close the union on a support and release a brake pedal. Repeat this procedure so many time, how many it is necessary in order that in the tank there were no air bubbles. Thus constantly add new liquid.
9. Close unions on a support and the working cylinder. Remove a hose and put on boots.
10. Lower the car on wheels.
11. Fill the tank with brake liquid to Max mark.
12. Several times press a coupling pedal. Thus, it is possible to check, whether the air which has remained in system is allocated in the tank.
13. Check work of brake system and system of a drive of coupling.
ATTENTION

At the described process of removal of air it can remain in system. It is possible to determine it by a characteristic sound at inclusion of transfer and to bad switching off of coupling. In this case it is necessary to remove air in conditions HUNDRED by means of the special device.


14. Establish the bottom cover of an impellent compartment, thus address to the subsection Removal and installation of the bottom cover of an impellent compartment.
Air removal by means of the special device

In conditions HUNDRED air from hydrosystem is removed by means of the special device. This device creates pressure in 2.5 bar on brake liquid in the tank.
15. Unscrew a stopper of the tank of brake liquid. Fill in liquid to Max mark. Attach the device according to the instruction, not including it.
16. Put on a hose the union of removal of air (the shooter on an accompanying illustration), for example, V.A.G 1238 B/3 of the working cylinder (In). The end of a hose lower in the capacity filled with brake liquid or connect to device capacity for air removal.
17. Open the union and hold its opened until bubbles will stop to leave.
18. Several times press a coupling pedal.
19. Fill in liquid in the tank to Max mark. Screw on the tank a stopper.