Audi A4, S4

since 2000 release

Repair and operation of the car

Audi A4, S4
+ Introduction
+ Governing bodies and methods of safe operation
+ Current leaving and service
+ Engine
+ Cooling systems, heating and air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
- Systems of electric equipment of the engine
   + System of ignition and engine management
   + System of preheat of the diesel engine
   + Diagnostics of systems of electronic control and diagnostic equipment
   - Systems of charging and start
      General information
      The battery - the main data and acquisition of the new battery
      Check and charging of the battery
      Replacement of the battery
      Storage of the battery
      System of charging - general information and security measures
      Check of system of charging
      Removal and installation of the generator
      Removal and installation of the regulator tension/replacement of brushes
      System of start of the engine - the general information and precautionary measures
      Removal and installation of a starter
      Check of system of start of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Removal and installation of the regulator tension/replacement of brushes



  1. Remove the generator, address to appropriate section.

Depending on model removal of the regulator possibly also on the installed generator.

  1. Turn off nuts on connecting plugs.
  2. Turn out screws and remove a protective cover from the generator.

Depending on model generators of various executions can be installed.

  1. Turn out screws and take out the regulator aside.
  2. Replace brushes for what unsolder a rope.
  3. Check wear of rings, if necessary pierce them and polish (work HUNDRED).



  1. Insert new brushes (And) and springs (In) into the brush holder (C) and solder contacts.
  1. To exclude hit of solder in a rope at the soldering, clamp a brush rope flat-nose pliers.

At solder hit ropes become rigid and brushes unsuitable for work.

  1. Install into place the regulator of tension and fix it.
  2. After installation of new brushes check them for ease of the course.
  3. Fix a protective cover on the generator.
  4. Screw nuts on connecting plugs.
  5. Install into place the generator, address to the Section Removal and installation of the generator.