Replacing generator bearings on a VAZ 2112 on your own

Generator bearings and their replacement

Generator malfunctions are common problems associated with the electrical equipment of the VAZ 2112. In particular, the cause of incorrect operation of the generator is bearings, which wear out over time. Replacing the generator bearings on a VAZ 2112, done on your own, will help set everything up. On the VAZ 2112, the generator, the bearing replacement of which is carried out independently, will last a long time and reliably.

Generator and bearing wear

VAZ 2112 alternator bearing replacement

Bearings and their wear are one of the most common generator malfunctions. Just like pulley wear or brush wear, bearing failure means you need to start the replacement process right away. But, before moving on to the direct replacement algorithm, I would like to dwell on preventive measures to prevent breakdowns.

VAZ 2112 replacement of generator bearings

It is important to know that all generators are divided into two types. The first is alternating current generators, and the second is direct current. The VAZ 2112 car is equipped with an alternating current generator, which also has a built-in diode bridge or, more simply, a rectifier. This rectifier is very important, because it is responsible for converting the current into a constant value, which is why the car works. The diode bridge is located either on the generator body or in its cover.

Replacing the bearing of the VAZ 2112 generator

We will not list here all the design elements of the generator, but will list only the most important ones. So, in addition to the diode bridge, an important element in the functioning of the generator is also a relay regulator. And of course, bearings.

Types of generator faults

Like any device in a car’s electrical system, a generator can have two types of faults:

• Mechanical type of failure.
• Electrical type of fault.

Replacing the generator bearing on a VAZ 2112

Bearing wear is a mechanical problem. This type of malfunction also includes destruction of fasteners, breakage of the housing, malfunction of the clamping springs, belt, and the like.

Note. It happens that a symptom indicating a characteristic malfunction of the generator may also appear as a result of completely different problems. For example, poor contact in the fuse socket or burnt contacts can be taken as a malfunction of the generator.

Lada 2110 NAGAINA › Logbook › Replacing the generator on a VAZ 2110 1.6 16 valve, through the top.

Hello to all those celebrating ( : ! Congratulations on the upcoming eN Ge on the 14th ( : ! I decided to write what I did not have time to write that year. There will be many letters ( : ! Gennady began to show signs of his ill health at the end of summer, this was manifested in in the form of the rustling of the bearings. The bearings were bought and were waiting in the wings, but with the repair I took more and more time. As they say, until the roast rooster pecks, the man can’t cross himself! And because of my laziness, for the most part, I missed this moment and the crocodile said on his incomprehensible spinning shaft, something like: “Grry drty drynt squabbles and Happy New Year, please send NAFIH owner!”.

When he lived out his last days, there were the following symptoms: - very noisy and loud operation of the generator; — generator low charge, very low: 9 -11 V; — endless whistling of the belt.

The car was left for a week near the house. A little creativity in my performance (: .

This week I removed the generator near the house, across the top

, then as it turned out, I had to do all this wisely, more on that a little later. There is a service station near my house, for a hundred rubles they let me disassemble the generator using their tools, so two days passed. When I installed the bearings, it immediately became clear that everything was broken due to the bearings not being replaced in time. The play of the rotor axis along the generator was, to put it mildly, terrible. Verdict: replacement with a new generator, bearings did not help.

How to find out that the generator is faulty

Replacing a bearing on a VAZ 2112 generator

This is quite easy to do. You need to pay attention to some points:

• You can judge whether the generator is faulty if the battery indicator lamp on the instrument panel constantly blinks while the engine is running.
• The battery quickly discharges or, on the contrary, boils away.
• The car headlights are too dim, even though the battery is new and fully charged. In addition, when the engine is running, a characteristic quiet but rattling sound is heard.
• As engine speed increases, the brightness of the headlights changes significantly. For example, when over-gasping, this is also observed with a working generator, but in this case the headlights brighten, but then remain at the same intensity. With a faulty generator, this happens all the time as soon as the speed increases.

Replacing generator bearings VAZ 2112

• Extraneous sounds and squeaking coming directly from the generator.

Attention! Belt tension and the general condition of the generator must be checked regularly.

Causes of bearing wear and checking them

Replacing the generator bearing VAZ 21124

Almost all mechanical damage in a car generator, including bearing wear, is associated with long-term operation. Modern generators are equipped with sealed bearings that cannot be repaired. It is these bearings that, after a certain service life, must be immediately replaced entirely.

Replacing the generator bearing on a VAZ 21124

In addition, the following may be the causes of bearing wear:

• Poor and low quality components.
• The presence of unfavorable external factors: high temperatures, moisture, salt, road chemicals, dirt, etc.
• Violation of operating rules or operation outside normal operating conditions.

If the bearings on the generator are worn out, then it begins to howl or hum. In some cases, when the engine is running, the generator begins to whistle in a special way. In these cases, the bearings must be replaced, having inspected their seats in advance.

Which generator bearings are best to choose?

Replacing generator bearings VAZ 21124

Generator bearings last a long time, but, as mentioned above, they do not last forever. However, if you choose the right bearing manufacturer, their service life can be significantly increased. Two types of bearings are usually installed on the VAZ 2112:

• Front bearing 6302 or 6303.
• Rear bearing 6202 and 6203.

Note. It's worth noting that 6302 and 6202 bearings were used in older generators. As for the new ones, bearings 6303 and 6203 are installed in them.

The price of bearings, as a rule, is not high - 50-150 rubles. Bearings differ in size. So, the rear bearing has an internal diameter of 15 mm, while the front bearing has an internal diameter of 17 mm. As for the outer diameter, it is 35 mm at the rear bearing and 47 mm at the front. The highest quality generator bearings:

• Our domestic bearings produced at the Vologda plant are rightfully considered the best.
• In second place are KOYO bearings.
• In third place is Kraft.
• Bearings produced by ANDYCAR, Czech Republic, are also considered to be quite good, but are much cheaper.

Replacing bearings

VAZ 2112 how to change the generator bearing

So, the moment of truth has come - the bearings need to be replaced. Let’s finally make sure that these are definitely bearings and not something else. Bearing noise is heard when the car engine is running:

• We stop the engine.
• We remove the generator belt and start the engine again to make sure that the tension roller is not acting up. If the sound remains after removing the belt, then you need to replace the roller, and if the noise disappears, then the problem is definitely in the bearings.

Removing the generator

Let's get started:

• The generator mounting nut is loosened.
• The adjusting bolt is removed.
• The negative terminal of the battery is disconnected.
• The wires are disconnected from the generator.
• The front part of the crankcase protection is dismantled.
• The lower mount of the generator is unscrewed.
• The generator is removed through the bottom.

VAZ 2112 generator bearings

Generator analysis

So:

• We block the generator rotor by unscrewing the pulley. We do this very carefully so as not to damage anything.
• Remove the casing by pulling out the latches.
• We disassemble the brushes and 4 bolts of the generator halves.
• Remove the back cover, first making marks on the two halves.

Note. The back cover can be easily removed with a screwdriver.

• A nut is screwed onto the rotor thread.

Note. The easiest way to remove the rotor from the generator is to grasp the ears of the front cover of the generator with both hands, and then firmly tap the side with the nut on a solid piece of wood.

Direct replacement of bearings

So:

• Now we put a suitable object on the bearing, for example, a 27 socket and knock it out.
• We fill new bearings with grease.
• We hammer it into place using the old bearing.

Note. In order for the new bearing to sit securely in place, you will need to flare its edges using a chisel or core.

• We change the rear bearing. To do this, place a thin chisel or screwdriver under the bearing, and hit it with a hammer on top.

Note. You can also remove the rear bearing in another way, using a large open-end wrench as a lever.

• Again, we insert the new bearing through the head 27 or using a suitable pipe of the required size.
• We begin assembling the generator.
• The front cover is installed first, and then everything is done in reverse order.

The above instructions for replacing bearings with your own hands are unique and fully consistent with practice. It is recommended to use photos and video materials during the process as visual examples. Needless to say, the cost of repairs will be minimal, because you will only need to pay for new bearings and some small items, including the necessary tools.

VAZ 2110 generator mounting bolt, assembled

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