Audi A4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
- Electrotechnical equipment
Minus is connected to weight
The help for orientation in the electrotechnical equipment of the car
Wires
Connections of wires
Central switching knot
Support of additional relays
Box for electronics
Relay and control units
Switching relay
H-contact of the relay of unloading
Table of the relay and control units
Safety locks
Table of safety locks
+ Electric circuits
+ Accumulator
- Generator
Generator of alternating current
Control bulb of charging
Tension regulator
Self-help in work with the generator and regulator of tension
The movement with the defective generator
Maple and poliklinovy belt
Check of a condition of a maple and poliklinovy belt
Replacement of a maple and poliklinovy belt
The belt torn maple
Review: maple and poliklinovy belt
The help at malfunctions
+ Starter
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics
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Self-help in work with the generator and regulator of tension
Maintenance of the generator of alternating current is not provided if to exclude extremely seldom arising need for replacement of graphite brushes. More serious damages cannot be eliminated by means of amateur means.
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To uncover (2) generators of Bosch, weaken three screws with crosswise heads (1), remove B+ wire from a cut finger (3) and take out fixing ledges (shooters) from grooves. |
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The regulator of tension (2) keeps on two screws with crosswise heads (1). Figure "3" designated an axis of the sliding contact in the generator. |
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On the dismantled regulator of tension (4) we designated length of contact brushes (2) shooters. Figure "1" showed contacts of the regulator of tension, "3" – fixing screws. |
Check of tension of charging
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- Connect the voltmeter between a plus pole of the generator and weight.
- Start the engine on average turns.
- At the serviceable regulator of tension the device will show from about 13,3 to 14,6 Century.
- If it not so, then check graphite brushes or replace the regulator.
- The generator is otherwise faulty.
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Check of graphite brushes
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- Disconnect a minus pole of the accumulator.
- Depending on model of the car provide access to the back party of the generator (for example, dismantle a broad tank or facing of a motive compartment) or dismantle the generator.
- Dismantle a cover behind on the generator.
- Remove the regulator from the generator. For this purpose weaken both fixing screws.
- Cast away the regulator a little in order that graphite brushes did not hang.
- Measure a ledge of graphite brushes: new graphite brushes have length about 13 mm; the size of wear is 5 mm.
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Replacement of graphite brushes
Replacement of graphite brushes is not provided in modern generators any more – graphite brushes are not delivered as spare parts any more. If they were erased, then it is necessary to change completely the regulator.
But if someone can get graphite brushes in a workshop on repair of the electrotechnical equipment of cars as spare parts, can make separate replacement: in this case the soldering iron, solder and, besides, ability to solder are necessary. The description given below belongs to the generator of Bosch:
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- Dismantle the regulator from the generator as it is described above.
- Unsolder connecting plaits, take out graphite brushes.
- Remove press springs from old brushes and put on new brushes.
- Solder connecting plaits.
- Use at the same time a little tin solder and work quickly that connecting plaits did not become impregnated with tin. Otherwise they will lose flexibility.
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Council: At the dismantled regulator you can also check copper contact rings of the core of the generator (on them graphite brushes move). If on them there are already scars extra earnings, then they can be chiseled and polished in a workshop on repair of the electrotechnical equipment of cars.
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Dismantle of the generator
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- Disconnect the accumulator wire connected to weight differently there is a danger of short circuit.
- Four-cylinder engine: where is, unscrew a weight wire.
- Take off a klinorebristy belt (it is described in the head further).
- Dismantle the connected wire.
- Unscrew fixing bolts of a collar of the generator and take out them, hold at the same time the generator.
- Six-cylinder engine: take off a klinorebristy belt (it is described in the head further).
- Dismantle the lower cover of a motive compartment.
- Dismantle from below the connected wire and a guide of a stream of fresh air.
- Weaken fixing bolts, remove the generator.
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