Repair of VAZ 2114 generator: removal, disassembly, replacement of brushes

The generator in a car is included in the list of main attachments and is an important element. Among the main functions, one can highlight the fact that a car generator charges the battery and also powers the on-board network after starting the internal combustion engine.

At the same time, although the general design is similar, the design of the generator may differ slightly in different cars. In any case, it is important to be able to promptly identify possible problems, as well as know how to diagnose and repair the generator if necessary.

Next, we will look at how the generator on the VAZ 2114 is structured and works, what features the generator on this model has, what signs indicate that the 2114 generator is out of order, how to repair the generator, etc.

Main malfunctions of the VAZ 2114 generator

The fuse has blown. To fix this problem, you just need to change the fuse. But first you need to find out the reason.
The circuit supplying the devices is broken. Be sure to check the connection of the neutral wire with other contacts.
Damage to the ignition switch. Make sure the ignition switch circuit board is in good condition.
Indicator lamp malfunction.
Brush malfunction. To eliminate the problem, it is necessary to replace the brush holder and the brushes themselves; it is enough to clean the oxidized slip rings with gasoline, or treat them with WD-40.
Malfunction in the voltage regulator.
Damage or malfunction of the alternator belt.
The bearing is faulty or broken.

The described malfunctions are very common, if you ignore them and do not make the necessary repairs in a timely manner, the generator will be permanently damaged, and subsequently it will have to be completely replaced. Which in monetary terms is much more expensive than repairing minor problems.

But don't rely on yourself if you don't have the appropriate training. The best solution would be to contact a service station for qualified assistance.

Which generator is better to install?

Regardless of which generator is installed on the Priora, the owners of these cars often replace the unit due to the fact that not all devices allow connecting various equipment to the on-board network. Which manufacturer is good and which device is better to install on the Lada Priora?

You can supply generators of the following brands:

BATE 90 ampere;
KZATE 115a;
BOSCH 120 amp;
devices manufactured by VAZ for 120 or 115a.

Generator unit for Priora

In principle, other models of generator devices for domestic cars can be found on sale. When purchasing, the main thing is to check the integrity of the unit so that there are no signs of damage on the body. It is better to use high power so that there is a power reserve, thereby the device will last longer. In addition, it should be taken into account that it is not recommended to install less powerful generators, especially if many devices are connected to the vehicle’s on-board network.

Checking the serviceability of the generator

Defects in the operation of the generator can have unpredictable consequences. If there is insufficient charge coming from the alternator, the consequence will be that the battery will die and as a result the car will simply stall. But the most dangerous thing is that if the alternator produces high voltage, the entire electrical system of the vehicle will be damaged as a result.

We check the power of the VAZ 2114 generator using a tester:

After turning on the ignition key, make sure that the instrument panel lights are on, only then the engine starts. If the battery icon is lit or blinks dimly, this indicates damage to the generator circuit.
The engine must be warmed up to 90 degrees, only after that all energy-consuming devices must be turned on.
We connect the tester directly to the battery. The assistant accelerates, keeping the rpm at approximately 3200 - 2500. If the voltage is 13V, the generator is working.
We turn off the devices consuming energy, and again take measurements, also at engine speeds of 3200 - 3500. The generator is operational if the voltage is 14.7V.

On a note! The main reason why the generator produces low voltage, below the level of 13V, may be due to malfunctions: insufficient tension of the generator belt, the generator circuit is damaged, the voltage regulator is damaged, the brushes are completely worn out, the generator must be replaced.

While the car is running, you need to pay attention to the sounds coming from the generator; if you hear a hum, this is an indicator of bearing wear, in this case it needs to be replaced.

Useful video

You can get additional information on this issue by watching the video below:

replacing speed sensor VAZ 2114 injector 8 valves
Installation and connection of fog lights for VAZ 2114
Coolant level sensor for VAZ 2114: device, check and replacement

One day the car stopped starting from a dead battery, I charged the battery and drove it for 3 days after which it was discharged again. At that time I was still just a novice motorist, so I immediately thought that the battery was faulty, I bought a new one in the store, brought it and installed it, literally 5 days later the car would not start again because the battery was dead. I went to the store and demanded a replacement, after much persuasion from the manager, they finally agreed to replace the battery. Well, history repeated itself, then I realized that I had to go to a car service center; they didn’t tell me about the generator malfunction. This is how I unknowingly killed a lot of nerves and time.

Source

Why does the battery icon light up on the dashboard?

When you turn the ignition key, the system displays all icons on the instrument panel to check the vehicle’s serviceability, i.e. All system lights are fully functional. Then the engine starts, so the lights should go out when the machine is in full working order. But if one of the lights does not go out, this indicates an existing problem.

Accordingly, if the battery icon does not go out, this is a consequence of the fact that the generator supplies too little voltage, or it is completely absent.

What is this?

A self-generator is understood as a unit that converts mechanical energy into electrical energy. The device is designed to power electrical equipment. For example, thanks to the generator, the wipers, battery, headlights, and dimensions work. If such a unit comes out of a standstill, the motorist notices immediately.

Signs of a faulty generator:

Dimming of headlights.
Complete and sudden battery discharge.
Spontaneous battery recharging.
Deterioration in headlight performance as the speed increases.
Problems with the wipers.

You won't be able to drive for a long time with a faulty generator. The car will constantly stall while driving. You need to change the device as soon as possible. You can buy it in Russia in different places. The main thing is to give preference to reliable sellers. After all, the current-generating device must be durable.

Replacing generator brushes after their natural depreciation

Reasons for depreciation of generator brushes:

Voltage drop.
At dusk, there is insufficient illumination from headlights.
The battery is not charging.
and etc.

During normal maintenance, no one pays attention to small problems of the generator; for this reason, worn brushes are always a surprise. Do not rush headlong to change brushes if primary symptoms of problems occur. Find out the source of the problem, then disassemble the generator housing.

How to dismantle the generator brushes:

Before carrying out work on replacing the generator brushes, it is necessary to remove the assembly together with the voltage regulator, so we unfasten the minus terminal and disconnect the wires from the casing.

Disconnect the wires.
We remove the cap from the output wire system to +, disconnect the nut securing this bundle and remove it from the block.
We remove the plastic casing, having first disconnected the clamps.
Disconnect the voltage regulator fasteners.
When removing the regulator, do not forget to disconnect the wire block.
We change the brushes using the same method, but the sequence changes; we install everything in its original place.

Just a note! Be sure to check the wear of the brushes; they change when the length of the rod wears down to less than 0.5 mm. If the brushes are of normal length, a possible reason for the lack of charge is a malfunction of the voltage regulator or brush regulator circuit.

General design of the generator set

Covers made of aluminum alloys. They contain special sockets into which bearings are pressed. On the back cover there is a terminal for connecting to the battery and a connector (“male”) for connecting to the excitation winding. There is also a capacitor attached to the back cover. It helps suppress radio interference. The brush assembly is mounted in the same housing with the VAZ 2114 voltage regulator. The generator operates due to the fact that an emf created by the rotating magnetic field of the rotor is induced in the stator winding.
The stator is made of plates made of special grades of transformer steel. It has special grooves into which the power windings are placed. Each has a terminal for connecting to a rectifier. The covers are bolted to the stator. The field winding is located on the rotor. It is connected to copper rings. They are on the shaft. A drive pulley is installed at the front, and there is a keyway for it on the rotor.
The diode block is attached to the back cover from the inside. It consists of nine semiconductors - six main and three additional. To ensure high-quality cooling of semiconductors, aluminum alloy plates are used. And on the front part next to the drive pulley there is an impeller.

Checking the voltage regulator

As we have already found out, the voltage regulator is checked together with the brush holders, so that if the circuit between the brushes and the regulator is damaged, we can immediately see this problem.

First, we check the brushes to see if they are broken or worn out; therefore, on your VAZ 2114, replacing the generator brushes is inevitable.

We prepare the necessary parts for testing, these are wires, a car battery, a 12V light bulb, AA batteries, to build two circuits:

Checking the voltage regulator

If the voltage regulator is working properly, then the voltage is 14.7 V. If the supply exceeds the norm, it is necessary to stop the supply of voltage to the brushes.

If there is a problem with the voltage regulator, if the lamp is on, the cause is damage to the regulator. If the lamp does not light up at all, the reason is that there is no contact connecting the regulator and the brushes, or the circuit may be broken.

The regulator must be replaced if the voltage is less than 13V when the on-board system devices are turned on. An increased voltage of more than 14.7V may also be a consequence of damage to the regulator.

The process of removing and reinstalling the voltage regulator completely coincides with the process of removing the brushes from the generator, because they are removed along with the voltage regulator.

Problems with the diode post

Checking the serviceability of the diode bridge is quite simple. The fact that it is faulty is indicated by either increased voltage or lack of charge. You should not delay repairs, as this may result in serious problems in the vehicle's electrical network.

But the diode bridge can fail only in the event of a breakdown of the power diodes. They can be replaced if necessary. True, sometimes some problems arise with this. The fact is that finding power diodes is quite difficult. You may have to make an exciting journey through the disassembly of a VAZ-2114, but it is much faster and easier to replace the old diode bridge with a new one.

Alternator belt tensioning procedure

An important factor is the tension of the alternator belt. If its tension is weak, the voltage in the on-board system can be reduced. In this situation, a whistle is heard, and the battery icon on the dashboard begins to flash.

Strong tension also has a negative effect, since it negatively affects the life of the bearings in the generator.

Important! The alternator belt must be replaced every 15,000 km. When visually checking the belt, pay attention to its structure; it should not peel off or tear, otherwise it should be changed urgently.

The permissible belt tension depends on the generator: for model 37.3701, when tensioning, the permissible deflection is 10 -15 mm, for model 9402.3701, the deflection is allowed 6 - 10 mm, when pressing 10 kg.

Comments • 16

I don’t know, I have the factory one. Simple 13.8. Not more. There's a lot of 14.2.14.3. Even though I put in a lot of music

Does it fit from the Priora without any modifications to the fasteners?

Suitable if the engine is injected. I don’t know about carburetor ones, I haven’t seen them

Hello, are you from Krasnoyarsk?

@Eugene Siberian can I find you on Instagram or VK?)

Good afternoon) where can I get such a dashboard for 14

Greetings! Car markets, websites and VK groups for the sale of spare parts and tuning for VAZs. The device is called Flash X3

Has your problem gone away?

@Eugene Siberian got it, thanks

Low voltage? After replacing the generator, everything went away, stable 13.7 and above with consumers turned on

I have 16 cells on my 2112, there is also a voltage drop for a second, there is such a regulator, please tell me, replacing the regulator solves the voltage drop when releasing the gas?

if you have trt or trw, I don’t remember the exact name, in general, it’s Chinese, then replacing it with Russian 849.3702 or 897.3702 should fix the drawdown when releasing gas

Who knows, Priorovsky generators are suitable for mounting on a VAZ 2114-2115 1.6. 8kl? 9402.3701-14 115A

You also need to look at the voltage regulator. It's either Russian or Chinese. If it is Chinese, then when you release the gas there will be a drawdown for a second

Yes, that’s right, either drill it out or buy new ones with a larger diameter, the generator itself fits in exactly the same way and the belt fits

@Eugene Siberian, as I understand it, you need to drill out 2 terminals and buy a connector for the signal lamp? I just didn’t understand anything from the video, the nuances, but actually everything is off topic.

Yes they fit no problem

In this video I installed such a generator. I also have a 1.6 8kl

make dubbings I have dubbings 14.4 everything I can include 14. exactly

@Aa Aa from the generator to the battery, I personally have 25 kg on both + and - and on the body there is an additional kg - 35

cool, gotta do it

The bolt must be installed on the other side once it has been removed. So as not to twist the wheels next time.

It’s easier to remove the bracket in one without any problems with pressing on the engine and even more so bending the body iron. I don’t know how anyone has it, but on my car there is a seat for 6 edges under the head of the bolt, and if you put it the other way around, the length of the bolt may simply not be enough, and you’ll have to struggle with attaching the nut. From the entire video, I essentially didn’t learn anything about what fits and what doesn’t, I only learned about the wire to the signal light on the panel. There’s essentially nothing to disassemble and assemble to explain. Tomorrow I’ll go get a new one, I don’t trust the old one anymore, although I invested a little over 1000 in it, bearings, slip rings, in the end I’ll scatter it for spare parts, I specially went to the service center, they called, they put it on a stand, everything is fine, after installation this demon stopped again charge after some time. As a result, I removed this goat in the evening in frost below 40 without a pit in an iron garage, again I installed a replacement in no better condition from another car, so the generator, not mine, ended up in the car again. The video is absolutely not informative; it does not correspond to the title “All the nuances of installation on a VAZ”.

I have a nine carb, the generator is weak, it doesn’t play music, can I put a generator like yours on it? And what will you have to do?

The generator on the VAZ-2114, which generates electricity while the car is moving and thereby recharges the battery, is primarily a mechanism. The latter, as you know, tend to break. A malfunction in the operation of the car's electronics can be caused by a malfunction of the generator. Fortunately, everyone can check it for functionality, select a new part and replace the worn one. But before you start practicing, you need to gain some theoretical knowledge.

We tighten the belt

The tensioning process itself depends on the engine size of 1.5 or 1.6, since the VAZ 2114 model.

1.5 L engine:

We loosen the fastening of the VAZ 2114 generator.
Using the adjustment screw, we adjust the belt tension; if we need to tighten it, we act clockwise; if necessary, loosen the direction of movement counterclockwise.
When we have reached the required belt tension, we strengthen the generator and be sure to check the belt.

1.6 L engine:

In the same way as in the first case, we loosen the fastening of the VAZ 2114 generator.
Using a crowbar, we move the generator slightly away from the engine and tighten the belt; if it is necessary to loosen the belt, we move the generator in a different direction, i.e., towards the engine.
After completion, secure the generator and check the belt tension.

Important! After the work was done, the problem did not disappear, the voltage drop process continues, so the problem was not identified, be sure to check the generator.

Alternator Removal Tools

A bracket is attached to the engine block (approximately in the middle). The generator housing is secured to the bracket on the block using a special strip. Thanks to it, it becomes possible to adjust the belt tension. To remove the generator, you will need the following tool:

Wrenches (preferably box and open-end) with sizes “10”, “13”, “17”, “19”.
Some vehicles may require a "15" socket.
A small pry bar or short piece of pipe.

Generators for VAZ 2114 and Priora in comparison

Many car enthusiasts want to install the most powerful type of generator in their car. In this case, the best option would be a generator with air conditioning used for installation on models such as Priora and Kalina. The power is 115A, while the power of the factory copy is only 80A.

But there is a small nuance: you will have to replace the pulley; this is an inexpensive and fairly easy procedure.

Many car owners recommend the Eldix model generator, with a power of 115 A. It is a good model, but it has a huge disadvantage: it is impossible to get spare parts.

Specifications

Brief description of the technical characteristics of the generator:

The rotor winding (excitation) is powered by a voltage whose value is in the range of 13.2 – 14.7 Volts.
Under a load of 10 kg, the belt sag (over a long section) does not exceed 0.8 cm.
The generator on the VAZ 2114 (its price in stores is about 4,000 - 4,500 rubles) is capable of delivering a current of up to 80 A to the network.

The unit is located on the left side, the drive is carried out using a poly-V-belt from a pulley on the crankshaft of the car engine.

Signs of a faulty generator diode bridge

The bridge is an electrical circuit of diodes that process signals from alternating current flows into direct current. Problems with the generator directly depend on problems in the diode bridge.

Problems that can completely leave the battery without a charge or charge the battery more than normal ultimately have huge negative consequences with the internal electrical system of the car.

The function of the diode system is not only in the process of converting current pulses, but also in its unipolar transmission from the generator to the battery. Accordingly, if the diode is faulty, the current is directed in both directions, or the current supply is completely stopped. The cause of damage and malfunction of the diode bridge is poor-quality contacts, or as a result of moisture penetration.

To check the diodes, the bridge must be dismantled using fairly light manipulations.

We dismantle the diode bridge of the generator:

Disconnect the “-” terminal from the surface of the battery and detach the wiring system from the casing.
Unscrew the wires.
We remove the rubber cap from the wires + terminal, disconnect the nut securing these wires and remove them from the generator block.
We remove the plastic casing, having previously unfastened the fastening system.
Disconnect the mount for the regulator.
When removing the voltage regulator with brushes, do not forget to unfasten the wire block.
Use a wrench to remove the bolts securing the bridge.
Having bent the leads directed to the stator winding, we unscrew the capacitor mount.
We take out the diode bridge. We unscrew the 2 nuts of the contact bolt, remove the bushings from it, and also remove the bolt from the bridge. That's all, now you can change or check the diode bridge.
We repeat the installation process in reverse order.

Removing the diode bridge

Video “How to repair a Priora generator with your own hands?”

Detailed information and recommendations regarding the repair of the generator unit from the Lada Priora car are given in the video below (the author of the video is the Do-It-Yourself channel).

If the generator is seriously damaged, it does not have to be repaired, but completely replaced. Parts necessary for repair may be missing, or the breakdown may not be repairable at all. Meanwhile, the on-board voltage and the quality of battery charging depend on the good operation of the power unit. It's a shame when, despite a good motor, electrical equipment does not work properly.

And if we are talking about VAZ cars, then sometimes a replacement is in demand due to the lack of power of standard devices. Modern automakers offer many additional devices that increase the level of comfort when traveling, but they also consume a large amount of electricity, and old devices cannot cope, so they have to be replaced with more powerful ones.

Many people are interested: which generator to buy if they have a VAZ? Here you need to consider them separately by model, so before you go shopping, read the recommendations of specialists and compare them with your wishes and capabilities.

How to remove a generator on a VAZ 2114

We remove the VAZ 2114 generator:

In order to remove the VAZ 2114 generator you need a pit or a lift.
The protection must be removed from the engine.
The tension roller for the drive belt needs to be loosened.
Disconnect the top bolt securing the generator.
Then remove the bottom bolt securing the generator.
Disconnect the air conditioning compressor mount.
The drive belt is removed and the VAZ 2114 generator is removed from its seats and subsequently shifted to the right closer to the battery.
Then simply unscrew the top bolt securing the air conditioning compressor.
We simply take out the compressor and hang it up; the tubes are strong enough and can easily support its weight.
The generator holder bolts must be unscrewed.
After disconnecting the terminal, the generator and its holders can be pulled down.
Installation follows the same method but in reverse order, and be sure to adjust the drive belt.

As a result, if the winding is shorted, it is necessary to find out the reason. If any contact ring has become unsoldered, this problem can be eliminated by unwinding the defective turn back, then removing the broken end and soldering the unwound drive. If desoldering occurs, it is also enough to simply solder the wires.

Relay problems also occur due to a sufficiently strong or weak charge; it is changed during repair of the generator. If the generator is working properly and the signal on the panel is flashing, this indicates a malfunction of the diodes. Since these elements are located in the generator, their necessary replacement is carried out when the VAZ 2114 generator is disassembled.

Excessive noise is the result of wear on the rotor bearing. If it is completely worn out, it must be replaced; if the violations are related to the lack of play in the bearing, it is enough to fill it with oil.

You can repair a generator yourself if you know and follow the procedure. If possible, check the operation of your vehicle in a timely manner and carry out the necessary replacement of parts.

Types of mechanical failures

Failure in the technical part of the generator - wear of the bearings, bending of the pulley (if it is not bent too much, the device will work with a whistling belt), failure of the fasteners.

Attention! Mechanical breakdowns appear after an accident; they rarely occur during operation.

Unnatural noises when the generator is running.
Voltage drop.
The car drives faster, then slows down sharply when you press the gas pedal with the same amount of force.

Elimination of a simple breakdown - repair. If several parts fail on a VAZ-2113, 2114, 2115 or other Lada model, replacement is needed.

COMMENTARE • 16