E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engine
   + 3.1.2. Specifications
   + 3.2. Dismantle and major maintenance of the engine
   - 3.3. Engine electric equipment
      3.3.2. Specifications
      3.3.3. The battery - engine start-up in emergency situations
      3.3.4. Removal and battery installation
      3.3.5. Power cables
      + 3.3.6. Ignition system
      + 3.3.7. System of a charge of the battery
      + 3.3.8. System of start-up of the engine
      3.3.9. Malfunctions of the generator
      3.3.10. Main malfunctions of electric equipment
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice


3.3.9. Malfunctions of the generator


Bad contact of brushes
Brushes hanged (dirt), are worn-out. Contact rings are polluted.
Malfunction of the vypryamitelny block
Connections of plugs with conclusions of the battery of a "mass" wire are polluted or is absent. A mistake at battery connection (return polarity). The wrong connection to the additional battery at engine start-up. Electric welding was carried out at the connected generator. Absence of contact of conclusions in generator sockets, pollution of conclusions or defeat by their corrosion.
Malfunction of the bearing
Arises because of an excessive tension of a driving belt more often. At load of a generator pulley the sliping belt publishes a sharp sound which at all does not mean that a belt will pull. The worn-out driving belt leans on a bottom of a stream of a pulley, instead of on lateral walls of a pulley, as generates such sound.