Stator 5 (Fig. 10.4) and covers 4 and 9 are pulled together by four bolts 16. Rotor shaft 6 rotates in bearings 12 and 14, which are installed in the covers. Power supply to the rotor winding (excitation winding) is supplied through brushes and slip rings.
Fig. 10.4. Generator parts: 1 - protective cover; 2 - voltage regulator, combined with a brush unit; 3 - rectifier block; 4 - front cover; 5 - stator; 6 - rotor; 7 - fan impeller; 8 - spacer sleeve; 9 - back cover; 10 - pulley; 11 - pulley mounting nut; 12 - Front rotor shaft bearing; 13 - protective washer of the rear rotor bearing on the winding side; 14 - rear rotor bearing; 15 - protective washer of the rear rotor bearing on the slip ring side; 16 - tie bolts; 17 - bolts for fastening the voltage regulator and rectifier unit
Three-phase alternating current induced in the stator winding is converted into direct current by rectifier unit 3, attached to cover 4. Electronic voltage regulator 2, combined with a brush holder, is also attached to cover 4. Voltage for excitation of the generator when the ignition is turned on is supplied to terminal "L" of the regulator.
The generator operation is monitored by the battery discharge indicator located in the instrument cluster. When the ignition is turned on, the indicator should light up, and after the engine is started, it should go out if the generator is in good working order. Bright or dim lighting of the indicator indicates malfunctions.
The excitation winding is located on the rotor 6 of the generator. The terminals of the excitation winding are soldered to two copper contact rings mounted on the rotor shaft. Power is supplied to the excitation winding through two contact brushes and contact rings. The generator connection diagram is shown in Fig. 10.5.
Fig. 10.5. Generator connection diagram: 1 - generator; 2 - rotor excitation winding; 3 - stator winding; 4 - rectifier block; 5 - voltage regulator; 6 - Engine control unit; 7 - Low battery indicator light; 8 - battery
Helpful advice: Recently, many companies have appeared that specialize in repairing imported starters and generators. In them, you can diagnose a faulty unit, purchase spare parts for any model of generator (starter) and get qualified advice. If you are not sure that you can repair the generator (starter) yourself, it makes sense to contact such a company, where the repair will usually be done quickly, with good quality and at an affordable price. However, on cars with high mileage, it is often more profitable to replace the unit as a whole with a new unit than to replace the failed parts.