Audi A4

since 1994 release

Manual of the car

Audi A4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
- Coupling
   Coupling functioning
   Coupling actuating
   Coupling check
   Check of hydraulics of coupling
   The help at malfunctions
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics


Coupling actuating

Force with which we press a coupling pedal has to be transferred to the release bearing. In Audi A4 it is carried out in the hydraulic way – as well as in the brake system. When you press a coupling pedal, the piston in the working cylinder (on a coupling pedal) forces out a certain amount of liquid and peredavlivat it to the main cylinder (on the transmission). There the piston goes out of the cylinder a little and thus the lever of switching off sets the release bearing in motion.

 Council: Each connection of coupling causes sliding of overlays of the conducted disk of rather opposite surfaces of friction and their heating. Especially strong wear is promoted by start from the place on high turns which is called cavalry, start on the 2nd transfer, the movement at intersections on the 2nd or 3rd transfer with partially wrung out pedal of coupling or the movement uphill.

Type of the coupling established on (dismantled) four-cylinder engine

1 – the conducted clutch plate;
2 – a gear wreath of a flywheel (the starter is linked to a gear wreath);

3 – press clutch plate.