Audi A4

since 1994 release

Repair and operation of the car

A4 Audi
+ 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
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
- Electrotechnical equipment
   Minus is connected to weight
   The help for orientation in the electrotechnical equipment of the car
   Connections of wires
   Central switching knot
   Support of additional relays
   Box for electronics
   Relay and control units
   Switching relay
   H-contact of the relay of unloading
   Table of the relay and control units
   Safety locks
   Table of safety locks
   + Electric circuits
   + Accumulator
   - Generator
      Generator of alternating current
      Control bulb of charging
      Tension regulator
      The self-help in work with the generator and the regulator of tension
      The movement with the defective generator
      Maple and poliklinovy belt
      Check of a condition of a maple and poliklinovy belt
      Replacement of a maple and poliklinovy belt
      The belt torn maple
      Review: maple and poliklinovy belt
      The help at malfunctions
   + Starter
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

Check of a condition of a maple and poliklinovy belt

In the photo the tension device of a poliklinovy belt for the generator, a servonasos and the viscous fan is shown:

1 – a ledge for installation of a rozhkovy key;
2 and 3 – openings for fixation of the tension device in the unloaded state.

When openings coincide, the corresponding pin is inserted into them.

Fixation of the tension device of a poliklinovy belt for the generator, a servonasos and the viscous fan: the spring rotary lever (2) leans back Rozhkov a key to the right (in the direction of an arrow) until it is impossible to insert a pin (1) into both coinciding openings.

To pull a klinorebristy belt of the compressor of climatic installation, it is necessary to weaken fixing bolts (1 and 3) on the console of a tension roller (4). Then establish a dinamometrichesky key (2) on a hexagon of the console of a tension roller and tighten on 25 nanometers in the direction of an arrow. Wrap fixing bolts.

Audi does not provide this point of maintenance any more, but nevertheless we believe that preventive check is anyway useful:

  • For check of a belt completely turn several times the engine.
  • Only this way you will be able really to examine all surfaces of belts. Often belts have only the one and only crack which when checking can be lying precisely on a belt pulley.
  • Urgently replace the torn or uncombed belts.

Check of a tension of a maple and klinorebristy belt

The subject of a tension of a maple belt in Audi is substantially obsolete, since:


  1. The device of an automatic tension of a big poliklinovy belt in four - and six-cylinder engines constantly provides its correct tension therefore at most that it is possible to make, it to subject to check operability of the device of a tension of a belt.
  2. By strong pressing by a finger on the tense belt it has to, resisting, to cave in, and the tension roller has to turn away aside. When the belt is released, the roller leans back back and pulls a belt. If the belt freely hangs between belt pulleys, the tension roller is faulty (or forgot to take out a blocking pin from the tension device).
  3. To maple belt of the water pump in the four-cylinder engine rigid installation which cannot vary is set. If the belt is pulled poorly and thereof slipping of a belt on a belt pulley is too great, maple the belt needs to be replaced.
  4. Ideal tension: at strong pressing by a thumb the belt between both belt pulleys has to cave in approximately on 5 mm.
  5. Short poliklinovy the belt which is the drive of the compressor of climatic installation at the four-cylinder engine, is regulated at the first installation and keeps this tension throughout all service life.