Replacing generator brushes on a VAZ 2107 without removing the generator

Leaving the parking lot in the morning, I noticed this: after starting the engine, the voltage on the battery drops to 10 volts on the voltmeter. The battery charge sensor arrow is almost in the red zone. As soon as you turn on the turn signals or wipers, the tidy lights start flashing. I checked the belt tension - everything is fine. Well, I think the simplest thing is to change the brushes and relays. If there is no effect, then dig deeper. Fortunately, it costs 180 rubles (brushes and relay assembly). I bought everything and went to the garage. I’ll describe the process in a nutshell, maybe it will be useful to someone). We disconnect the mass, it is better to remove the battery completely, it will be easier to unscrew the tension nut. We unscrew the tension nut, I used a 17 mm socket and a long wrench.

Next, we climb under the car, remove the protection and under it we see the bracket that holds the generator.

We unscrew the nut, remove the belt, disconnect the chip from the generator and unscrew the two terminals with a 8mm wrench.

Carefully, so as not to break the pulley, we pull the generator down (the Rubik's cube resembles the procedure...) and climb out of the hole))

we unscrew the relay together with the brushes, install new ones, assemble everything in the reverse order, tighten the belt and everything works))

Replacing the VAZ-2107 generator brushes is perfect as a training demonstration for those who do not yet consider themselves specialists, but are just learning the basics of car repair and maintenance. This information can be used not only to repair the “Seven”, but also for other models (VAZ-2110 and 2114). Now let's proceed to a more detailed study of the issue.

Tips and recommendations for replacing brushes on a VAZ 2107

Welcome, friends, to the DIY car repair website. Despite the large number of foreign cars, cars of the VAZ family are still in demand and find their use among motorists who know a lot about technology and appreciate the advantages of the domestic automotive industry.

As you know, operation and repair are inseparable concepts, and in the event of failure of any component, identifying and repairing the fault can be done on your own. Let's look at a simple repair using the example of a VAZ 2107 car generator.

Where are the brushes of the VAZ 2107 generator

The generator brushes on the VAZ 2107 car are located in the rear half of the device (generator) and are held in place by one bolt.

The brush assembly itself is located next to the slip rings and is connected to the voltage regulator. The brushes are held in place by springs next to the rings. Knowing the circuit diagram of the generator, it is not difficult to find the brushes. To replace, you will need a standard set of tools:

  • Several wrenches;
  • A pair of screwdrivers;
  • New brushes;
  • Liquid WD-40 (in order not to strip the threads of the bolts).

Malfunctions and principle of operation of generator brushes

The electrical system of your iron horse provides a fault indication when the VAZ 2107 generator does not work; a red warning light with a battery symbol lights up on the instrument panel.

Quite often the cause is wear or sticking of the brushes. Those who are familiar with the principle of operation of a generator know that an excitation voltage is supplied to the armature through the brushes, which not only starts the electric machine (generator) into operation, but also regulates its output power.

The regulation itself occurs due to a special device, a relay-regulator, which can be implemented directly on the brush holder or installed separately (on earlier models).

As a rule, such a malfunction manifests itself gradually, initially accompanied by short interruptions in the operation of the generator, gradually leading to its complete failure, but other options are also possible, for example, a sudden failure.

How to determine whether the VAZ 2107 generator brushes are faulty

Often, when carrying out a preventive inspection of a car, attention is not paid to various details. Alternator brushes are one of these little things; if they wear out, the generator will stop charging the battery. Experts recommend inspecting the brush assembly once every 45-55 thousand kilometers. Diagnostics of the brushes can be carried out without removing the generator, and in some cases it may even be possible to replace them without removing the main unit.

The main signs of malfunction of the VAZ 2107 generator brushes include the following:

  • The car's electrical appliances suddenly turn off (even while driving);
  • Headlights, dimensions and even interior lighting dim and flicker;
  • A sharp decrease in the voltage of the vehicle's on-board network;
  • A sharp discharge of the battery, which will be very difficult to recharge in the future.

Each of these points may indicate wear on the generator brushes, which are located inside this unit. Many people wonder how to check brushes.

Replacing the VAZ 2107 generator brushes yourself

The brush repair itself usually boils down to replacing them, but first you need to remove the brush assembly from the generator housing and assess the degree of wear, inspect for chips and cracks.

Replacing the brushes of a VAZ 2107 generator is a simple procedure and usually takes a few minutes; replacing the brushes does not require removing the generator, just disconnect the power wire, unscrew the two screws securing the brush holder housing and carefully remove this unit, do not forget to disconnect the negative terminal of the battery first.

Attention! The battery should be disconnected during any work related to the electrical equipment of the car!

Check the dismantled assembly for freezing, jamming of the brushes and their protruding working part, which should be at least 12 millimeters. In case of discrepancy, the part must be replaced; brushes for the VAZ 2107 generator can be purchased at almost any auto parts store.

After eliminating the malfunction, or purchasing new ones (it’s better to buy small parts with a sample of old ones, so that you don’t have to change them later), you need to install them in the reverse order.

How to remove alternator brushes on a VAZ 2107 - step-by-step instructions

You can remove the generator brushes on a VAZ 2107 car as follows:

  1. The first thing you need to do is disconnect the negative terminal of the battery.

  2. Then we pull out the brush holder output connector.
  3. The brush holder is located on the end surface


    (the opposite side from the pulley on which the generator belt fits) on the right side. It consists of two parallel metal pins and plastic holders.

  4. Next, you need to find the screw securing the brush assembly and unscrew it. The assembly should now easily detach from the main part.

We check the protrusion of the brushes and their uniform wear. The working surface (length) of the brushes must be at least 12 mm; if less, then the VAZ 2107 generator brushes must be replaced. In addition, you should check the ease of movement of the metal structures in the holder; they should not rub or jam. If free movement does not occur, then it is recommended to also blow the generator rotor with compressed air.

Alternator brushes for the VAZ 2107 are not expensive; in specialized Lada spare parts stores they can be purchased for only 50 rubles.

What brushes to buy for the VAZ 2107 injector generator

It is noteworthy, but motorists who are far from the design of the vehicle are sure that the brushes that are installed on generators of models from the same manufacturer correspond to each other, so it does not matter which models they are intended for. And this is absolutely correct, especially for the VAZ-2107, 2110, 2114 models. Therefore, do not worry if you managed to find brushes that are not for your model - they will definitely fit. Moreover, generator brushes for VAZ cars can be easily installed on BMW or Audi cars - they are a perfect fit. Therefore, if you need to purchase brushes for your VAZ, don’t worry, finding and replacing them will be very easy.

Tips and tricks

If, before repairing the generator brushes of your car, you noticed noise in its operation, this may indicate that the bearings of the VAZ 2107 generator may be worn out, and in this case, it is necessary to remove and disassemble the VAZ 2107 generator.

A worn bearing has increased play of the rolling elements and must, in this case, be replaced with a new one. You should know that premature bearing failure is not only due to lack of lubrication.

Often an over-tightened generator drive belt contributes to this, and an over-tightened belt can damage the cooling system pump bearing.

Therefore, check this unit regularly in accordance with the manufacturer's recommendations. It is better to get into the habit of regularly inspecting the engine compartment with the engine running, this will allow you to detect and eliminate the problem earlier and at minimal cost.

Correct diagnosis will help you avoid additional work and unexpected breakdowns.

How to check (ring) the brushes of a VAZ 2107 generator - step-by-step instructions

In order to check (ring) the brushes of the VAZ 2107 generator with your own hands, you need to get a multimeter and follow the following procedure:

  1. We connect the generator brush to the multimeter in the same way as shown in the figure.

  2. We start ringing the left generator brush first

  3. Now let's check the right brush

Generator brushes - why are they needed?

Quite often (especially in older models) there are cases when, with a sharp increase in driving speed, various seemingly inexplicable things happen: the light of the dashboard or headlights dims, the cigarette lighter and (or) radio work intermittently. Drivers who have not been hardened by many years of experience in the cold lake may mistakenly think about burnt fuses, wiring, or shorted devices. It can take a whole day or more to work through all these versions. But what will be the driver’s surprise when the true cause of the malfunction becomes clear, that the whole essence of the problem is due to some small pieces of black metal called generator brushes.

Generator device

Based on 9th or 8th grade physics lessons, everyone knows that any generator must include two main parts, one of which is movable (rotor), and the second, correspondingly, stationary (stator). Each part has a copper (in most cases) winding. Under the influence of magnetic force, the rotor begins to rotate, powered by electricity through the armature and two other metal parts. And they are called generator brushes. Due to the constant impact of friction, all parts gradually wear out due to the constant rotation of the rotor. This happens in any case, regardless of the quality of the material of the parts (and it is really strong).

How to determine the malfunction?

If, while warming up the car, you begin to notice strange actions on the dashboard (the voltmeter readings change greatly with minimal engine load or the battery charging light lights up), then this can only mean one thing - the alternator brushes are worn out and need to be replaced.

How to determine a generator malfunction

In some cases, a good warm-up of the engine allows you to “extinguish” the indicator. At the same time, the car drives on the autobahn quite calmly and normally, without any signs of malfunction. But you shouldn’t be such an optimist, because your car may break down at the most inopportune time. Don't forget to check the condition of the alternator winding and belt, although the absence of sparks and smoke suggests that the brushes are the cause of the breakdown.

Replacing brushes on a VAZ-2107 and other similar models - is there a difference?

To begin with, it is worth clarifying that generator brushes are the parts that require replacement most often. For this reason, developers create special generator designs so that the driver can make the replacement without any problems. The process of their wear is quite long, it depends on the life of the car, as well as on the intensity of the load. When purchasing a used car with a fairly high mileage, you should not wait until the parts wear out and stop functioning fully. It's better to replace it right away. Fortunately, the low cost allows this.

Replacing old parts

People who are far from the structural features of their vehicle may well think that the production of different models at the same plant makes the replacement process the same (we are talking about popular domestic models). To be honest, this guess is correct. One can say even more: almost all models with an internal combustion engine have the same replacement process.

Tip: You can install brushes from VAZ on some Audi or BMW models, and they will function perfectly. The appearance, however, is slightly different with a rougher edging, but this does not affect the operation.

Questions from readers related to replacing the brushes of the VAZ 2107 generator

And now I would like to answer the most common questions that readers send me related to replacing the VAZ 2107 generator brushes.

How much do brushes cost for a VAZ 2107 generator?

Alternator brushes for the VAZ 2107 are not expensive; in specialized Lada spare parts stores they can be purchased for only 50 rubles.

What brushes to buy for the VAZ 2107 injector generator

It is noteworthy, but motorists who are far from the design of the vehicle are sure that the brushes that are installed on generators of models from the same manufacturer correspond to each other, so it does not matter which models they are intended for. And this is absolutely correct, especially for the VAZ-2107, 2110, 2114 models. Therefore, do not worry if you managed to find brushes that are not for your model - they will definitely fit. Moreover, generator brushes for VAZ cars can be easily installed on BMW or Audi cars - they are a perfect fit. Therefore, if you need to purchase brushes for your VAZ, don’t worry, finding and replacing them will be very easy.

Let's start the replacement process

We are gradually approaching how to carry out the replacement. The procedure is much more complicated than, say, replacing a windshield, so you initially need to protect yourself from possible electric shock. To do this, you need to disconnect the ground terminal on the battery. Despite the fact that the voltage in the electrical circuit of a car is not as high as, for example, in an electric train, even one random spark that hits you can become quite noticeable.

The location of the generator on the VAZ-2107 model and its other “colleagues” (2110 and 2114) is almost the same - it is installed in the right half of the engine compartment. In other words, it is located next to the main light on the passenger side. Moreover, there is absolutely no difference whether the car has front-wheel drive or rear-wheel drive - the developers of the Zhiguli do not change their style, adhering to their own traditions. The metal body is attached to the engine with several fastening nuts. You can recognize the generator by the flywheel and the drive belt stretched over it.

Now you need to decide on the choice of replacement procedure. For those who are not in the know, replacing generator brushes can be done in two ways:

  • with removal of the generator;
  • without removal.

The main difference between these methods is that after replacement you will need to adjust the tension of the drive belt. But if for the VAZ-2110 and 2114 the adjustment will not be any difficulty, then the owners of the VAZ-2107 will encounter difficulties due to the poor layout of the mechanisms. Choose the method that suits you best.

Next you need to adhere to a certain order.

Step 1. Remove the protective cover installed on the generator housing.

Remove the protective cover

Step 2: Remove the power terminal from the female connector.

Disconnection is important for safety reasons!

Step 3. In order to remove the parts of interest in this case, you need to unscrew the 2 fastening bolts. Then remove the brush holder with holder.

Don't lose the mounting bolts. They will still be useful to you.

Step 4. Conduct a visual assessment of the condition of the brushes: the protrusion from its socket should be no more than 5 millimeters. After this, make a replacement.

Visual inspection of old brushes

Step 5: Reassemble.

The final stage is reinstallation

Important! Install the brushes into the holder with extreme care and precision. They must “sit” freely in the nest.

Representatives of the automotive industry have long decided to meet drivers halfway by creating a special holder, which includes brushes and a voltage regulator. Its cost is about 150-200 rubles higher than the cost of the kit. Of course, everyone tries to save money whenever possible, but before making a purchase, think about how much you can save this way? In addition, you will not carry out such a replacement very often (in some cases, brushes are replaced only a few times during the entire period of use of the car).

The voltage regulator may also be the cause of the malfunction. Before installing the unit into the generator, connect the battery cable (positive) to the plug connector of the unit, and the negative lead to the housing. After connecting the wires, you need to connect a rheostat and a 3-volt light bulb to the brushes. If connected correctly, the light should light up. Change the voltage little by little, moving its indicator from 12 to 16 V. After you reach 16 V, the connected light bulb should go out. If the light is still on, the voltage regulator is most likely faulty.

Useful tips

If, before replacing the brushes, you begin to notice noise when the generator is running, then this malfunction may indicate wear on the generator bearings.

Increased play may indicate premature bearing wear. In this case, you need to replace it.

Important! Premature bearing wear can occur for many reasons, not just due to insufficient lubrication.

Often, an overtightened alternator belt leads to bearing failure.

To prevent breakdowns of vehicle systems, it is advisable to regularly check components according to the manufacturer’s recommendations. Try to create a habit of periodically inspecting the engine compartment for noise. This will avoid serious damage and solve existing problems with minimal financial costs. It’s better to do everything right than to do it “as always.” Good luck on your journey!

Video - Replacing generator brushes on a VAZ-2107

VESKO-TRANS.RU

Content

generator brush replacement

for VAZ-2113, 2114, 2115

Brush generator

they serve as conductors of electronic current: they bring it and take it away. Thanks to their work, the alternator generates voltage, which helps measure the functioning of the vehicle's electrical devices.

The brushes are made of graphite, carbon parts are especially popular, and for engines operating at high speeds, the brushes are impregnated with a special compound that prevents them from being used in a timely manner.

Basic faults

The main reason why alternator brushes fail is because they wear out, causing them to feel bad. Replacing the gear lever on a VAZ 2107. I sent a classic engine and gearbox to the engine, tell me what to do? The gear shift lever on the VAZ 2107 has come off (5-speed. Replacing the VAZ 2108 generator brushes yourself. You can identify the faulty part due to the following problems:

  • power outage;
  • the battery discharges quickly or does not charge at all;
  • lights begin to burn much less or flash;
  • flashing lights flash;
  • There is not enough voltage to operate the electronics and they turn off (for example, the radio).

Why change brushes

If there are signs of brush breakage, replace them. VAZ 2104. 2107; replacement of generator brushes on VAZ-2113, 2114, 2115. Without dismantling the generator. Repair of generator brushes on VAZ 2105-2107 models. Do it yourself Vase 2107 Windshield replacement | auto guide If you don't complete the repairs on time, chances are you'll soon have to buy a new generator, which will have a completely different cost. Replacing the brushes of the VAZ 2107 generator. Photo, instructions on how to do it. The battery can only hold brushless ignition for a few minutes, which means it must be constantly charged. Replacement of VAZ 2110, Pin and Bearing Generator and Replacement Coming Soon.

Restoring an electric motor at a VAZ

Let's first look at how to replace the brushes of a VAZ 2107 generator. For work, we will be equipped with the following tools:

  • set of spanners;
  • screwdrivers - set;
  • rubber hammer.

So, we begin work on changing the generator brushes on the VAZ 2107.

  1. We disconnect the terminals of the battery, and also unscrew the cables from the terminals of the electric motor, dismantle it by unscrewing the fasteners. Loosen the belt and remove the electric motor.
  2. Unscrew the pulley mount while holding the rotor with a tool.
  3. Disconnect the traction relay.
  4. After unscrewing the nuts, remove the front cover of the assembly unit using a rubber hammer.
  5. We also use a rubber hammer to push the rotor out.
  6. We detach the back cover from the stator.
  7. We remove the brush holder from the stator and reinstall the worn parts.
  8. The electric motor is assembled in the reverse order.

This process, if something is not clear, you can also visually study the video called “replacing VAZ 2107 brushes.” Replacing brushes in a VAZ 2106 generator is done in exactly the same way.

If we turn to VAZ models with front-wheel drive, then there are not so many differences in the procedure. For example, let’s first consider how to replace brushes on a VAZ 2110, for which we first take this:

  • spanners;
  • Screwdriver Set;
  • hammer, block, or rubber-tipped mallet.
  1. Having loosened the belt, disconnected the wires and unscrewed the three bolts, we dismantle the electric motor.
  2. Having taken the unit out of the car, remove the pulley, holding the rotor with a screwdriver. In principle, the traction relay and rotor do not need to be dismantled; for the “seven” we did this for ease of work.
  3. Next, unclip the latches on the back of the electric motor, and then remove the plastic casing.
  4. We immediately see the voltage regulator assembly along with the brush holder.
  5. Unscrew the two screws and remove the brush holder.
  6. We renew worn parts.
  7. We do the assembly in reverse.

By the way, changing brushes on the VAZ 2112 is carried out one by one according to the same instructions.

Now let’s figure out how to replace an element on a VAZ 2109.

We will need to prepare:

  • set of spanners;
  • Phillips and slotted screwdrivers;
  • rubber hammer.

Here's what we do (this is an option without removing the traction relay).

  1. After loosening the belt and removing the tensioner bar, we dismantle the entire unit.
  2. On the dismantled unit, unscrew the pulley.
  3. After unscrewing the nuts, remove the front cover of the electric motor.
  4. Push the rotor out with a rubber hammer.
  5. We detach the stator from the back of the electric motor.
  6. We unfasten the diode bridge, take out our failed graphite tips and install new ones.
  7. Assembly is done on the way back.

It must be said that the work of replacing brushes on a VAZ 2114 takes place in exactly the same sequence. The same applies to work on the VAZ 2115.

In general, all VAZ electric motors for generating current have almost the same design. We have only discussed different methods of how to get to the treasured details.

There is even a way without dismantling the unit. Let's say, to replace the alternator brushes on a Priora, without removing the alternator, you need to do this: take a screwdriver and wrenches and open the hood.

  1. Disconnect the battery.
  2. Unfasten the wires from the electric motor.
  3. Remove the field circuit terminal.
  4. Remove the rear plastic casing of the electric motor by unscrewing the screws.
  5. Unfasten the voltage regulator, and then remove it complete with the brush assembly.
  6. Now we can reinstall our parts.
  7. Then you need to assemble everything in reverse order.

So, changing the alternator brushes on a Priora can be done directly on the car by opening the hood.

At the same time, it is better to change the Lada Kalina by removing the electric motor from the car. After all, it is compact and is attached to the bracket with just two bolts. Taking the same tools as in the previous case, you need to reproduce the following steps.

  1. Disconnect the battery and electric motor wires.
  2. Loosen the belt and unscrew the two fasteners and remove the electric motor.
  3. Remove the rear casing.
  4. After unscrewing the screws, remove the brush holder with the regulator and reinstall the parts.
  5. Put everything back together.

These are the simple steps you need to perform to change the generator brushes on the Lada Kalina.

Repairing an electric motor at Renault

And now, in order to get a complete picture of such an important operation, let’s consider its production on a foreign car. To replace an element on a Renault Megane 2 car, we will need:

We start by dismantling the electric motor.

  1. Having loosened the belt drive, unscrew the three fastenings of the unit.
  2. On the removed assembly unit, remove the connector and unscrew the cable.
  3. Remove the plastic cover.
  4. After unscrewing the two bolts, remove the relay with the brush holder.
  5. We update defective parts.
  6. We do the assembly, moving back point by point.

Replacing generator brushes on VAZ-2113, 2114, 2115

The generator brushes serve as conductors of electric current: they supply and discharge it.
Thanks to their work, the generator generates voltage, which contributes to the stable functioning of the car’s electronic mechanisms. Brushes are made of graphite, carbon parts are especially popular, and for engines operating at high speeds, the brushes are impregnated with a special composition, which prevents them from becoming unusable ahead of time.

Basic faults

The primary reason for the breakdown of generator brushes is their wear, which makes itself felt by a poor battery charge. You can detect a failed part by the following problems:

  • voltage failures;
  • the battery discharges quickly or does not charge at all;
  • the headlights begin to burn much weaker or blink;
  • instrument lights blink;
  • There is not enough voltage for the electronics to operate and it turns off (radio tape recorder, for example).


Why change brushes?

If signs of brush breakage are detected, they should be replaced.
If repairs are not carried out in a timely manner, there is a possibility that you will soon need to purchase a new generator, and this is a completely different expense. The battery can only hold the ignition without brushes for a few minutes, which means it will have to be constantly charged. And soon it will be replaced. You can check the condition of the brushes by the size of their protrusion from the seat. If the protrusion size does not reach five millimeters , then they should be replaced immediately to avoid possible problems.

It is recommended to replace it every 50,000 km or every season, which is the key to safe operation of the vehicle. It is better to have a spare set of spare parts so as not to get into an unpleasant situation on the road and then call a tow truck.

For a set of brushes you will need to pay from 150 to 200 rubles, depending on the store. The cost of repairs at a car service center will cost 200-300 rubles, inexpensive, of course, but why pay for something that you can do yourself?

Replacement

The process of replacing old brushes with new ones does not take much time and does not require special knowledge. The only thing you need to prepare are the tools:

  • socket wrench 13;
  • flat screwdriver (ordinary);
  • 8mm socket with ratchet.

Without removing the generator

If you are sure that the problem with the car breakdown is a malfunction of the generator brushes, then you can do without removing it.

  1. Turn off the negative terminal.
  2. Disconnect the wires.
  3. On the brush holder body, unscrew the two bolts holding it in place.
  4. We extract the structure.
  5. We check for damage and the size of the protruding part of the brushes (it must be at least 5mm).
  6. We install new elements and carry out installation in the reverse order.

With the generator removed

Poor charging of the car can be caused not only by the brushes, but also by the alternator belt. To eliminate this point, when replacing brushes, you should remove it to check the condition of the belt.

First, we dismantle the unit.

  1. We unscrew the bolt securing the generator belt.

  2. Move the unit towards the engine and remove the belt.
  3. Unscrew the tensioner bar and remove it.
  4. Disconnect the plug and terminals.
  5. We take out the part.

Let's move on to the brushes

  • Open the protective casing (cover).

  • Disconnect the brush power wires.
  • We unscrew the two bolts securing the element we need.
  • On the right side, using a 13mm wrench, unscrew one nut.
  • The voltage regulator should be raised.

  • We check the old brushes.
  • We clear their location.
  • We install new elements and assemble everything in reverse order.

Replacement result

After replacement, errors may appear about a low battery charge or a malfunction of the generator; there is no need to immediately try to find the cause of the failure. This phenomenon is not uncommon, since new brushes have just begun to break in. After some time, everything will return to normal, and you can safely continue using the car.

Replacing Generator Brushes VAZ 2107 Injector

Replacing brush

VAZ
2107
Welcome friends to the car repair site. Detailed instructions on how to replace the generator on a VAZ 2101, 2102, 2103, 2104, 2105, 2106, 2107 with your own hands (video). Replacing brake pads on a VAZ 2107 (rear and VAZ 2107, VAZ 2107) Replacing brushes Repairing a VAZ 2107. Duration: 21:40. Despite the huge number of foreign cars, cars of the VAZ family are still needed and used by motorists who know a lot about mechanical engineering and appreciate the advantages of the Russian automobile industry.

Of course, operation and repair are indivisible concepts, and in the event of a failure of a particular unit, fault identification and troubleshooting can be carried out completely independently. Replacement of VAZ 2107 Brush (WITHOUT REPLACEMENT). YouTube This article contains a detailed description of how to remove a VAZ 2107 generator. A step-by-step guide to removing a VAZ 2107 generator with your own hands. Replacing VAZ 2107 Engine Locks Easy and simple. Let's look at a simple example of generator

VAZ car
2107.

Malfunctions and principle of operation of generator brushes

The electrical system of your iron horse indicates a malfunction when the VAZ generator is turned off 2107. A red indicator with a battery symbol lights up on the instrument panel.

Quite often the cause is wear or freezing of the brush. Those who are familiar with the principle of operation of the generator . It is known that because of the brushes, the excitation voltage enters the valve, which not only starts the electric machine (generator) into operation, but also regulates its output power.

Tips for replacing generator brushes VAZ 2107/VAZ 2105

If you are sure that it is necessary to replace the brushes, then you can change them yourself and without removing the generator. To do this, turn off the power to the battery, unscrew the two screws of the brush assembly holder and change the assembly. In another case, when it is not possible to unscrew the bolts or you need advanced diagnostics of the serviceability of generator parts, it is necessary to remove the generator.

It is forbidden to start a car generator with a disconnected battery. This will lead to a short-term increase in voltage at terminal “30”, as a result of which the parts of the rectifier and the vehicle’s electrical network will become unusable.

To replace the brushes you will need the following tools:

  • ring wrenches for “8”, “13”;
  • ratchet;
  • a set of nozzles “for 13”, “for 10”, “for 17”; "at 19";
  • flat and Phillips screwdriver;
  • penetrating fluid WD 40;
  • vice (if needed);
  • new brushes for the VAZ 2107 generator.

The price of brushes VAZ 21013701470 is 34 rubles. Their analogue from UTM with article number HE0703A is 120 rubles.

The price is valid for Moscow and the region for the summer of 2022.

A problem in the power supply system is indicated by the battery charging arrow. This indicates that when the engine is running, the battery is not charging well.

The voltmeter showed a voltage of 11.2 volts. Ultimately, suspicion falls on the generator.

Let's start the renovation. First, remove the terminals and remove the battery.

Using a 17mm wrench, unscrew the nut and remove the adjusting bar.

We move the insulating cover, use a “10” wrench to unscrew the nut securing the wires at terminal “30” of the generator and disconnect the wires.

Disconnect the wire block from terminal “61” of the generator.

Using the socket “19” we unscrew the nut of the lower mounting of the generator.

Remove the drive belt from the generator pulley.

We knock out the bolt and remove the bushing. Please note that in this case the generator will be supported on a bracket.

We remove the generator from the car by lowering it down between the bracket and the front axle beam.

And here is the culprit of the “long journey”: a screw with torn edges.

We install the generator in a vice and use a screwdriver to unscrew the two brush holder bolts.

Old brush holder with brushes.

We install a new brush holder and assemble everything in the reverse order.

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