Stator 5 (pic. 10.4) and covers 4 and 9 are tightened with four bolts 16. The rotor shaft 6 rotates in bearings 12 and 14, which are installed in the covers. Power to the rotor winding (excitation winding) is supplied through brushes and slip rings.
Pic. 10.4. Generator details: 1 - protective cover; 2 - voltage regulator combined with a brush assembly; 3 - rectifier block; 4 - front cover; 5 - stator; 6 - rotor; 7 - fan impeller; 8 - remote bushing; 9 - back cover; 10 - pulley; 11 - pulley fastening nut; 12 - front bearing of the rotor shaft; 13 - protective washer of the rear bearing of the rotor from the side of the winding; 14 - rear rotor bearing; 15 - protective washer of the rear bearing of the rotor from the side of the slip rings; 16 - coupling bolts; 17 - bolts for fastening the voltage regulator and rectifier unit
The three-phase alternating current induced in the stator winding is converted into a direct current by a rectifier unit 3 attached to the cover 4. An electronic voltage regulator 2, combined with a brush holder, is also attached to the cover 4. The voltage to excite the generator when the ignition is turned on is supplied to the output «L» regulator.
The operation of the generator is monitored by a battery discharge indicator located in the instrument cluster. When the ignition is turned on, the indicator should be on, after starting the engine it should go out if the generator is working. The bright burning of the signaling device or its burning half-heartedly indicates malfunctions.
The excitation winding is located on the rotor 6 of the generator. The excitation winding leads are soldered to two copper slip rings mounted on the rotor shaft. Power is supplied to the excitation winding through two contact brushes and slip rings. The generator connection diagram is shown in fig. 10.5.
Pic. 10.5. Generator connection diagram: 1 - generator; 2 - excitation winding of the rotor; 3 - stator winding; 4 - rectifier block; 5 - voltage regulator; 6 - engine control unit; 7 - signal lamp of the battery discharge; 8 - battery
Helpful advice: Recently, many companies specializing in the repair of imported starters and generators have appeared. In them you can diagnose a faulty unit, purchase spare parts for any generator model (starter) and get expert advice. If you are not sure that you can repair the generator (starter) on your own, it makes sense to contact a company where repairs will be performed, as a rule, quickly, with good quality and at an affordable price. However, on high mileage vehicles, it is often more cost effective to replace an assembly with a new assembly than to replace failed parts.