E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 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
   14.2. Changed numbers
   14.3. Purchase of the old car or mysterious set of figures and letters
   14.4. Durability of the car
   14.5. About parallelism of bridges of the car and the trailer
   14.6. Preparation of the car for winter
   14.7. Rule 35
   14.8. Choice of the second-hand car
   14.9. Engine oils
   14.10. That it is necessary to know, changing oil
   14.11. Emergence in deposit oil
   14.12 whether. It is possible to mix import oils?
   14.13. "Eats" much, but silently goes
   14.14. It is rather live, than it is dead …
   14.15. It is not got - good advice
   14.16. Visit to car-care center
   14.17. A gear belt for a drive of the mechanism of a gazoraspredeleniye
   14.18. Wear of pistons
   14.19. Valves
   14.20. Bearings of engines
   14.21. Engine pollution
   14.22. As the conditioner works and what to do, if it failed
   14.23. Conditioner: not only "pluses", but also "minuses"
   14.24. Rules of service of the conditioner
   14.25. It is not necessary to stir antifreeze with antifreeze …
   14.26. That it is necessary to know upon purchase of the air filter
   14.27. Engine overheat
   14.28. That it is necessary to know to the owner of the car with the injector engine
   14.29. Accumulator
   14.30. Possible malfunctions of the storage battery
   14.31. What to do with the failed generator
   14.32. The belt is guilty, and we blame the generator
   14.33. Catalyst
   14.34. Rub in one - or how to save the catalyst
   14.35. Probuksovochka
   14.36. Features of operation of brake system
   14.37. Malfunctions of brake system
   14.38. Brake liquids
   14.39. ABS: natural choice
   14.40. Rims
   14.41. We update rims
   14.42. Scheme of marking of a car tire
   14.43. Metal corrosion
   14.44. Automake-up
   14.45. What creaks?
   14.46. Hatch
   14.47. Safety cushion: troubles or pleasures?
   14.48. We fit well?
   14.49. Anticreeping "immunodeficiency"
   14.50. Why headlights grow dull
   14.51. "Galogenki"
   14.52. About the correct adjustment of headlights
   14.53. Electric motor
   14.54. From change of places "composed" changes nothing?


14.31. What to do with the failed generator


What to do with the failed generator: to repair or change? If it is necessary to you such choice, it is not necessary to worry.

Speak, cars as people. The known share of justice in this comparison is. "Life" of generators, for example not so differs from the human. One units work and reach mature age, others suffer from an uncountable set of malfunctions. Some reliably serve some years, and then pulled hard "diseases" lead up them to a stop. Duration of existence of others does not overstep the bounds of youth.

Despite it, it is possible to return the majority of generators to life. Capitally repaired, restored, updated – call somehow – the generator – the phenomenon quite usual. There are two ways by means of which he can be born" anew.

The first – when the old knot is cleared by vapor jets or simply washed out, and then painted outside and is on sale as restored, is frequent with "guarantee" of the replacement in most cases expressed by the phrase: "If it does not work, bring it back". Whether there is such generator out of operation in a month or later – it is not known.

The second way is to buy really restored unit. They differ high quality as were exposed to complete dismantling, are cleaned, checked, and faulty and raising doubts of their part are replaced.

The generators restored industrially, pass in many respects similar process of restoration, and such small parts as brushes, contact rings and bearings are replaced without fail. The knot repaired at plant, is good, as new and at the same guarantees has the service life close to period of operation of the new unit.

In the latter case generators are put on trial on the maximum loading and capacity. You receive that, for what pay. The recoloured generators usually are much cheaper, than qualitatively touched knots. You, of course, can get a repair kit but if the case of your generator is faulty, a choice at you does not remain.

By the way of generator replacement

The application and replacement tables issued by producers, are usually exact, but some firms establish on the cars generators of various brands and the sizes. Even if old and new generators are at first sight identical, surely check electric sockets, the maximum current of loading, adjusting arms, fastening of pulleys and distance from the installation plane to a pulley – to be convinced that the pulley of the generator will be in one plane with pulleys on cranked to a shaft and the water pump.

Sometimes, in spite of the fact that the knot looks a little differently, its operation is possible. Despite an "origin" difference, generators have an identical maximum current of loading more often and are made so that all points of fastening and connection are in the same places.

The pulley, shponka and nut can not enter into a repair kit. Then they are rearranged from old knot on the new.

It is necessary to find out also that caused failure of the generator. If the reason external, the established spare parts can fail with the same success. Today it will be a question of most often meeting malfunctions of generators.

We repair

Besides unit replacement, there are other solutions of problems about which it is told above. For example, many replace generators at bad contact of brushes though it is possible to eliminate this malfunction with simple cleaning.

Way the first – to clear brushes independently and free. Even if you will need spare parts, this option will appear the cheapest. It not such difficult to what it seems at first sight. If at you it will turn out nothing, in the worst, than earlier, situation you will not appear.

The way of the second – to address for check and repair of the faulty generator to the expert. It is difficult to predict, in what repair cost will manage. It depends on nature of the malfunction, necessary spare parts and their cost. In any case your expenses will make about a half of cost of the unit restored industrially, but it is less than a half of cost of the new generator - the economy will be considerable.

However in each of these situations it is necessary to take into consideration age of the generator, and also economic feasibility of replacement of one or two details (brushes or contact rings) if others shortly, possibly, fail. Replacement of details is more preferable to non-standard or expensive generators, but it is meaningful to replace the most widespread models entirely.

Malfunctions of the generator

Possibly, the very first sign - abnormal work of a control lamp of a charge of the storage battery. If it does not light up at all, malfunction of the lamp or its power-supply circuit can be the reason of it. To find out it, disconnect the generator, include ignition and by a display lamp define operability of a chain on the small socket. The small socket can have marking of Ind, Ign, D +, or 15. If the control lamp, and a lamp of the indicator burn, then the power-supply circuit of a lamp is serviceable. If the generator thus does not give out a charging current, that, possibly, brushes are faulty. However if during check are not lit neither a control lamp, nor an indicator lamp, it is necessary to check a lamp and its power-supply circuit.

When the control lamp does not die away at normal operation of the engine, malfunction, most likely – in the generator. The truth short circuit on a chain site between a control lamp and the generator yields the same result.

Also check by means of the indicator tension existence on the big socket of the generator. Here it should be always – if it is not present, check generator connection to the storage battery. If the tension regulator on your car is located separately from the generator, it too can be faulty. In this case it is better to remove the generator and a regulator of tension and to address to the autoelectrician.

The simplest check of a current of loading of the generator is made so: marker lights of the car join and the engine is started. If at the working engine fires do not start to burn more brightly, this best proof of that the generator does not give a current. If you have a voltmeter, connect it to plugs of the storage battery and start the engine. On the raised turns of idling the generator should develop a current, and the voltmeter – to show about 14 V.Pokazaniya differ more than on 1 In? It is faulty either the generator, or a tension regulator.

In many cases continuous burning of a control bulb signals about malfunction of the generator, but malfunctions are possible and in other place, and the generator as it is paradoxical, can be serviceable at this time.

And nevertheless for the majority of car owners a control bulb – the unique indicator of serviceability of the generator. Most often meeting reasons of abnormal functioning of a control lamp of a charge and typical situations are given in the table. For example, the line "A control lamp does not light up" means that ignition should be already included, and at the same time it does not mean that the engine should be started. Malfunctions of the generator are given in ascending order probabilities of their emergence. The malfunctions italicized, have no direct relation to the generator. The table explaining to what can lead some of aforementioned malfunctions below is given.

The typical malfunctions reflected by a control lamp of a charge

Does not light up
Leaky contact of brushes
The tension regulator is faulty
Defect in a rotor winding
Bad contact to "weight" or its absence
The storage battery is discharged
The control lamp, safety lock, the switch, electroconducting are faulty
Does not die away
The vypryamitelny block is faulty
Defect in a stator winding
Malfunction in connection with brushes
The bearing (noise) is worn-out
Defects of electroconducting, break of a driving belt
Burns low at engine start-up
The vypryamitelny block is faulty
Leaky connection of electroconducting of a power-supply circuit of a control lamp
Blinks at operation of the engine
Bad contact of brushes
The tension regulator is faulty
Adjustment is broken