Vaz 2114 DIY repair of a vacuum brake booster

VUT is undoubtedly a very important mechanism in the braking system of a car. Its malfunction can become a source of danger, therefore, a periodic check of functionality is required.

Next, we will talk about malfunction indicators vacuum brake booster on VAZ 2114 cars, the algorithm for replacing it with your own hands.

To diagnose any VUT malfunctions, it is enough to look closely at the operation of the brake pedal. If at one moment it took more effort to slow down the vehicle, one can judge poorly working vacuum brake booster... To check, do the following:

1. Stop the car, turn off the engine.
2. Press the brake pedal repeatedly, then stop halfway.
3. Start the car without removing your foot from the pedal.

If the VUT is in good working order, the brake pedal will fall down, if this does not happen, the brake system is not in order.

1. Check if the connection between the pipe and the non-return valve is tight.
2. Make sure the flange is intact.
3. Inspect the bends of the pipes. They will need to be replaced if cracks or wet marks are found.
4. If the liner seal located under the steering column is damaged, the vehicle will automatically brake.
5. To make sure that the cause of the brake system malfunction is this, you need to get out the mat and carefully inspect the protective cap. When it sticks, the shank seal is defective.
6. Remove the cap, start the engine. Wiggle the valve stem several times. If a hiss is emitted at the same time, a breakdown is clearly taking place.

If there is at least one of the listed signs, the VUT VAZ 2114 must be replaced.

1. It is often recommended to disconnect the tubes that complicate the process of removing the VUT, but you can do without this.
2. Three of the four tubes running from the brake cylinder make it difficult to remove the cylinder. To dismantle the cylinder, you can unscrew only one nut by "10".

1. Remove the mounting bracket. It is better to use a special cardan (its image is in the photo). The VUT itself is attached to the body with four turnkey nuts on "13".

1. Move the mounting bracket to the new vacuum brake booster (you will need to unscrew a couple of nuts on "17").

Reassemble in reverse order.

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The reason for the need to replace the front suspension springs may be a violation of the integrity of the springs. This could be the result of mechanical ones.

The vacuum brake booster, or VUT for short, is one of the main working mechanisms of the vehicle's braking system. The efficiency of braking largely depends on its serviceability, and therefore your safety. Consequently, VUT must be regularly checked for timely detection of its malfunctions or malfunctions.

In this article, you will learn about the malfunctions of the vacuum amplifier, about the signs indicating problems in the operation of the VUT, as well as how to check and replace VUT with VAZ 2114 at home.

In order to check the VUT you do not need any tools, it is quite simple to pay attention to the brake pedal. If you find yourself once that you need to apply harder pressure on the brake pedal to brake or that the brakes have become less effective, this is a clear sign. VUT malfunctions.

1. To check the vacuum booster, stop the car and turn off the engine.
2. Press down firmly on the brake pedal a couple of times, then stop halfway through.
3. Then, without taking your foot off the brake pedal, start the car.

If the VUT is working properly, the brake pedal will fall down a little, if this did not happen with the amplifier or the brake system, something is wrong.

1. Check the tightness of the connection of the branch pipe with the check valve;
2. Make sure there is no damage to the flange;
3. Next, inspect all the bends of the pipes, finding cracks or wet traces - replace them immediately;
4. If the liner seal located under the steering column is damaged, the vehicle may start to brake spontaneously. In order to check this, take out the mat and conduct a careful examination of the protective cap, if it sticks, it can be assumed that it is defective.
5. Then you need to remove the cap and start the engine. Swing the valve stem a couple of times, hissing is a sure sign of breakage.
6. Having found the slightest hint of a malfunction, replace the VUT VAZ 2114, given its low cost and ease of replacement procedure, this will be better than hoping for serviceability and risking your own health.

To work you will need:

• A set of keys, open-end and socket for “10, 13, 17”;
• Buy a new VUT;
• A couple of hours of free time.

1. Disconnect the rod protruding from the vacuum booster from the brake pedal.

2. After that, in the engine compartment, it is necessary to unscrew the brake cylinder (TC) from the VUT.

3. Further, many “manuals” recommend to disconnect all tubes, which supposedly complicate the process of removing the vacuum brake booster. However, I do not like pumping the brakes, this is a waste of time, which is not so much already, so I decided that I would do without this item and did it my own way.

4. Three of the four tubes coming from the shopping center are attached to the body; they do not allow the cylinder to be removed from the vacuum. If you unscrew only one nut by “10”, you can easily remove the cylinder from the vacuum.

After you have removed the obstacle - the brake cylinder, disconnect the hose that goes from the intake manifold to the VUT valve.

Next, you need to unscrew the mounting bracket from the body, for this it is better to have a special cardan, see the photo. The vacuum cleaner itself is attached to the body with four turnkey nuts at “13”.

When the removal is done, move the mounting bracket to the new VUT, for this it is necessary to unscrew the two nuts at “17”. Assembly is carried out upside-down.

The fourteenth vacuum brake booster is a casing with a valve inside. It is divided into two parts by a rubber layer - a diaphragm - one part is atmospheric, and the other represents a vacuum space, which is connected to the intake pipe from the engine.

The booster valve is a plastic casing that contains the main parts that are subject to wear and tear and cause trouble for the driver in the form of gearbox rattles. The composition is as follows: there is a rod on the support sleeve, which is adjacent to the piston and its own buffer. Actually, the valve itself is on its pusher and return springs along with the filter.

The vacuum booster functions as follows: you press the brake to the floor, at this time the piston and the valve tappet move in such a way that this opens up the space between the two compartments of the unit. Then, the vacuum compartment moves into this space and takes in air. Air presses on the damper between the two parts of the amplifier, creating a different level of pressure in one and the second part of it. Due to this difference, the valve itself and the stem move, respectively.By lowering the pedal, all parts return to their places, the system ceases to function.

As with everything that concerns the parts of the system of any car, the repair of the vacuum brake booster is inevitable. In order to decide on the repair work - whether it will be a garage repair with your own hands or you should go to the service - you first need to determine the signs of a malfunction of the VAZ 2114 vacuum brake booster.

The device of the vacuum brake booster VAZ 2114

The answer to the question of how to check the vacuum brake booster is suitable not only for the fourteenth VAZ model, but can also be applied to the thirteenth and fifteenth.

1. Press the brake to the floor 4-5 times with the engine not running. This will create uniform pressure in the two parts of the amplifier. When you press the brake, the valve will immediately show itself: if it creaks, then you need to seriously think about it.
2. After the pressure has become even, turn on the fourteenth. But at the same time you need to hold the brake to the floor. If everything is in order with the brake booster system, then the pedal will rise after the engine starts. If this does not happen, then repair is definitely required.
3. In the case when you understand that there is a problem with the amplifier, you need to look to make sure how the hose is fixed, in what condition the flange. If the fastenings at any point do not correspond to the norm, this may affect the fact that the pedal is not lifted, and in fact it will be necessary to sin on a separate incorrect fastening, and not on the entire system as a whole.

Brakes are a whole system. Therefore, as soon as you have checked the amplifier, do not be lazy and check if the brake fluid is flowing, if the pedal itself is in order. It may be worth looking at the brake master cylinder and generally skating on diagnostics. And if, nevertheless, you did not find any problems in the brake system, then you might think about how to change the vacuum on a VAZ 2114.

It is important to understand that replacing the vacuum with a VAZ 2114 or any other VAZ model is a mandatory process. If the unit is malfunctioning, then the engine, respectively, too. The power that the engine will deliver depends on the correct functionality of the amplifier. What Russian doesn't like driving fast? As they say, you love to ride, love and change the vacuum.

For this process, you will need the following tools:

• Simple screwdriver
• Pliers
• Spanners 13, 17
• Specific wrench to unscrew the brake pipes
• Buy new fittings and plugs

The question of how to change a vacuum amplifier for a VAZ 2114 is very common. If the perception of the text is not accurate enough for you, you can always rely on our this article.

1. Removing the amplifier will interfere with the brake cylinder. Therefore, you can first remove it, or simply disconnect the pipe fittings from it and move it to the side. It is as your heart desires.
2. But the cylinder is not the main obstacle. Unscrewing the amplifier fasteners is, in principle, not easy, or rather inconvenient. We start with the valve: remove the hose mount, take out the support sleeve and take out the brake pin.
3. Then we take the key 13 and begin to unscrew the 4 fasteners of the amplifier.
4. Having endured the troubles and inconveniences, we are preparing to install a new one in its original place. But first, you need to put a special frame of fasteners on the purchased amplifier. We wake it up with a key to 17. and only then put it inside the wheelbarrow.
5. the assembly sequence is simple, but an important point from the point of view of convenience is the primary action of connecting the brake (pedal) and the amplifier (this is all with just a finger). And then fix the entire unit in the fourteenth.

As a recommendation, you can take the following information: with the replacement of the brake booster, you need to change the vacuum hose. It is also not eternal, and its deterioration can adversely affect the quality of the new amplifier.

About how much a vacuum brake booster costs on a VAZ 2114, it is better to find out directly from the stores.Since the regions are different, the price categories are different and it is easier to navigate locally. The approximate cost is from 2,000 to 3,000 rubles. Installing it in the service will cost a third, or even half, in fact, the cost. Despite the inaccessibility of the unit and some inconvenience, it is much easier to change the amp yourself. The frequency of breakdowns or replacement directly depends on the quality of the track, driving style and general wear and tear of machine parts, in particular, the chassis. Therefore, it is difficult to say that there is a certain regulatory period. The only thing to remember is timely diagnosis: it is sometimes worthwhile to get confused and go over your fourteenth with the eye of a caring owner. And, of course, do not delay the repair or replacement of the unit.

VUT or the VAZ 2114 vacuum brake booster is undoubtedly a very important mechanism of the car's braking system. Its malfunction can become a source of danger, therefore, a periodic check of functionality is required.

Next, we will talk about the signs of a malfunction of the vacuum brake booster on VAZ 2114 cars and step-by-step instructions for replacing it with your own hands.

Brake booster malfunctions entail several fatal negative consequences:

The deterioration of the braking qualities of the system, along with other signs, indicates a direct involvement of the brake booster malfunction in the risk of an accident. This sign is the main one among all the others, no matter how it is to operate a car with a very weak braking system is very dangerous - the contours in this case do not receive additional force and cannot effectively brake.

Elimination of a malfunction most often consists in replacing the faulty element with a new unit - this will save repair time, since the resuscitation of an old product will require no less time and a slightly lower cost of parts. That is why motorists most often resort to a complete replacement of a failed part.

The process of checking a vacuum brake booster on a VAZ 2114 is as follows:

1. Press the brake to the floor 4-5 times with the engine not running. This will create uniform pressure in the two parts of the amplifier. When you press the brake, the valve will immediately show itself: if it creaks, then you need to seriously think about it.
2. After the pressure has become even, turn on the fourteenth. But at the same time you need to hold the brake to the floor. If everything is in order with the brake booster system, then the pedal will rise after the engine starts. If this does not happen, then repair is definitely required.
3. In the case when you understand that there is a problem with the amplifier, you need to look to make sure how the hose is fixed, in what condition the flange. If the fastenings at any point do not correspond to the norm, this may affect the fact that the pedal is not lifted, and in fact it will be necessary to sin on a separate incorrect fastening, and not on the entire system as a whole.

In order to choose the best vacuum brake booster for the VAZ 2114, I recommend that you pay attention to the following points:

1. Price. Price is one of the most important criteria for choosing a vacuum amplifier. You should not buy cheap Chinese options in order to save money, since they will not last long. It is advisable to give preference to products of the middle price category - not the most expensive, but not the cheapest either.
2. Package. The original packaging used by the original manufacturer is manufactured by the Point of Sale. You should not buy goods from bazaar traders. There are tons of good, proven auto parts stores in any city. Ask to show certificates, documentation for details.
3. Label. The label must be clearly readable - the date of production of the part, the batch number of the issue and the name of the manufacturer. I am made of corrugated cardboard.

To replace the VAZ 2114 vacuum brake booster, you will need a certain set of tools and materials.It includes:

• Screwdriver Set;
• Pliers;
• 13 and 17 mm box spanner;
• Special wrench for brake pipes;
• New plugs;
• New fittings.

And, so we proceed to the replacement process itself:

The braking system of a car is subjected to constant loads, and with the so-called sporty driving style in the city - also overloads. This happens regularly, even with a measured and unhurried rhythm - you can't get away from this problem.

Therefore, this unit must be regularly tested to ensure the driver and passengers are as safe as possible. So it is in the history of vacuum boosters for brakes. As a rule, malfunctions in its operation occur due to the failure of a special diaphragm located inside the device ... It bursts, cracks, ceases to fulfill the duties assigned to it - to build up a vacuum. Sometimes The exhaust valve also malfunctions - it is for these reasons that the vacuum brake booster begins to hiss.

Repair of the vacuum brake booster of cars VAZ 2108-21099, VAZ 2110-2112, VAZ 2113-2115, Lada Samara

Spare parts. The right choice is buying repair kit for a vacuum brake booster manufactured by BRT (Balakovo)... The quality of products (not only of repair kits) from this manufacturer is always on top. But, in my case, a kit from AWEL (Ukraine) was purchased and installed. I will say right away that the quality of the rubber of this company is pleasantly surprising. Time, of course, will show / check how good everything is, but so far there are no complaints. The complete set of repair kits is the same (see photos 1 and 2).

Tool. In order to repair the VUT (vacuum brake booster), you first have to remove it from the car. How to do this and what tool you need, you can find out by reading the article on replacing the vacuum amplifier. To work on disassembling and assembling the amplifier itself, you will need the following tools: a large flat screwdriver, pliers, a hammer, and a couple of clean rags. Well, and, of course, do not forget about attention and accuracy))). There is nothing complicated in this work, but if you do it in haste, you can forget some part during assembly or damage the new diaphragm.

Photo report on the repair of a vacuum brake booster (VUT) of cars VAZ 2108-21099, VAZ 2110-2112, VAZ 2113-2115, Lada Samara:

The body of the vacuum amplifier consists of two halves. And in order to disconnect them, you need to deal with the factory rolling. To do this, use a large screwdriver to squeeze out all the folds on the body (photo 3). Pliers can also be used for this purpose (photo 4). But, no matter what tool you use for disassembly, the main thing to remember is that you should act slowly and carefully. Do not bend the metal in the opposite direction or break the edges of the case, because due to such rough handling, the subsequent assembly of the vacuum amplifier will be much more difficult.

Also, what I want to say or recall, there is a rather powerful spring inside the vacuum amplifier. And, if we forget about its existence, then, after squeezing out the last fixing sides, the amplifier can effectively fly apart / split into two halves. The surprise is not fatal, but not desirable. In order to avoid such an unpleasant incident, the halves of the amplifier should be fixed with standard GTZ nuts. We put several washers or nuts of a suitable diameter under them and tighten the nuts (photo 5).

If you don't want to mess with the nuts, then you can hold the halves of the amplifier with your hand during disassembly. This, of course, is not so convenient, but quite realistic.

Oops! After removing all obstacles, the amplifier falls apart (photos 6 and 7).

Now all that remains is to systematically replace all the old rubber parts with new ones. You can, of course, replace only one diaphragm.... In most cases, she is to blame for a malfunction of the vacuum booster.For example, in my case, the amplifier is practically new and replacing one diaphragm would be enough. But, it is still correct to replace all rubber parts. Plus, if traces of dirt, sand, brake fluid are found inside the amplifier housing, then the housing should be rinsed and cleaned.

Further, briefly and to the point. Remove the spring and washers with rubber rings. There are no rings in the repair kit, so we try not to break or lose them... And, most importantly, do not forget about them when assembling, since the amplifier will not work without these rings! Photo # 8.

We take out the plastic piston from the body. We remove the covers of the studs and the diaphragm from it (photo 9, 10, 11, 12). You can immediately install new parts in their place.

Remove the protective cover of the valve body. In its place we put a new one, photo 13 (after having smeared it with cast, cyatim, etc.).

Lubricate the studs. And carefully mount the piston into the body (photos 14 and 15).

We put washers with rubber rings on the studs (photo 16).

On the second half of the body, we change the sealing ring of the check valve and the GTZ stem (photos 17, 18, 19, 20).

We check that the diaphragm in the body lies flat, without twists and is not twisted (photo 21).

We connect the parts of the vacuum amplifier. We tighten them with nuts (photo 22).

Then, using a screwdriver and a hammer, bend the edges (photos 23 and 24).

Ready! Repair of the vacuum brake booster (VUT) of the car VAZ 2108-21099, VAZ 2110-2112, VAZ 2113-2115 completed... As you can see, there is nothing difficult in this work. The main thing is the presence of desire and time.

This video instruction demonstrates a way to restore the performance of a vacuum booster at home (removing the spring from the brake booster). It is not uncommon for a vacuum booster to become the cause of a triple engine. In order to fix the breakdown, you can buy a new one, but you can try to repair it. The wizard will show you how to disassemble and produce repair of the vacuum brake booster VAZ.

As a rule, no one repairs this unit responsible for the car brake, but changes it entirely, but if it is not possible to buy, then this method of self-restoring work will be very useful. For all the details and the sequence of disassembly, see the video plot.

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Even more useful tips in an easy-to-use format

Vacuum brake booster VAZ Samara Form (21099)

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Hisses when you press the brake pedal VAZ 21091

A vacuum booster is a device consisting of a casing that houses a valve. The part is split in two using a rubber cushion called a diaphragm. One part is atmospheric, and the second is a vacuum space and is connected to the intake pipe from the internal combustion engine.

The booster valve is a plastic housing that contains major parts that will wear out over time. Subsequently, the driver can observe the rattling of the checkpoint. The part consists of the following elements:

1. The stem is located on the support sleeve.
2. The piston is located nearby.
3. Buffer.
4. Valve with push rod and return springs and filter.

VUT works as follows:

1. The driver presses the brake pedal to the floor
2. At this time, the piston and the valve tappet move.
3. Opens up the space between the two parts of the amplifier.
4. Air exerts pressure on the damper between the two parts of the VUT and, as a result, a different level of pressure is created in each part.
5. Due to this difference, the valve with the stem moves.
6. As soon as the pedal is released, all elements return to their places, and the system stops working.

During the operation of the car, natural wear of parts is quite possible and the vacuum amplifier is no exception.

Before you go to the service or repair the VUT yourself, you need to determine the signs of a part malfunction.

In this section, we will tell you how to check the performance of a vacuum brake booster on a VAZ-2114.All the recommendations given can be used when checking the unit, both on the thirteenth and fifteenth car models.

To check, follow these steps:

1. Press the brake pedal all the way down about 5 times with the engine off. This action will create a uniform pressure in both components of the CWF. When the brake is applied, the valve will immediately give itself out. If you notice a creak, this is a clear signal to replace the part.
2. Once the pressure is even, start the car by holding the brake pedal on the floor. If everything is fine with the unit, the pedal will rise after the internal combustion engine is started. Otherwise, it is necessary to carry out repairs to replace the device.
3. When you already understand that the part needs to be replaced, you need to additionally check how well the hose is fixed, as well as what state the flange is in. If these elements are in a state that does not comply with the standard, this may affect the performance of the amplifier. Accordingly, in this case, you may need to tighten the fasteners and the problem will be solved by itself.

The brakes in a car are a whole system. Accordingly, if you have already checked the amplifier, then additionally make sure that no brake fluid leaks anywhere. Check the condition of the pedal itself. There are situations when it will not be superfluous to check the brake cylinder and diagnose the entire system as a whole.

If checking the brake system showed no obvious problems, and the device we need refuses to work normally, then the VAZ-2114 vacuum amplifier will need to be replaced.

Please note that a malfunctioning amplifier has a significant impact on the operation of the internal combustion engine. The power of the motor, which it will deliver, depends on this.

Before replacing, you must prepare the following tools:

1. Screwdriver.
2. Pliers.
3. Socket wrenches 7 and 13.
4. Special wrench for unscrewing the brake pipes.
5. Additionally prepare new fittings and plugs.

Step-by-step algorithm for replacing a part:

1. When dismantling the VUT, you will clearly be hindered by the brake cylinder, which is better to remove from the very beginning or disconnect the fittings from it and move it aside.
2. The cylinder is not yet the main obstacle. The next step is to unscrew the VUT fasteners, which is not very easy to do, and also inconvenient. Start at the valve. Release the hose lock, remove the support sleeve and extend the brake pin.
3. Take the 14 key and unscrew the 4 amplifier mounts.
4. After removing the part, prepare to install the new device on the vehicle. First of all, put a special fixation frame on the VUT, which will need to be tightened with a 7 key, and only then install this element on the VAZ.
5. The assembly sequence is fairly straightforward. Please note, from the point of view of convenience, first of all, the brake pedal and the amplifier are connected with a finger, and then the unit is mounted in the car.

As a recommendation, with the replacement of the vacuum booster, you can also replace the hose. This element is also subject to wear and tear, which sometimes affects the quality of the new device.

In a situation with the instability of the dollar exchange rate, it is best to find out all prices in specialized stores. To make it easier for you to navigate, we note that the minimum cost of VUT starts from 2,000 rubles and above. Accordingly, the better the part, the more expensive it will cost.

If you are going to install an amplifier at a service station, then get ready to pay up to a thousand rubles in addition.

Frequency of part replacement usually depends on the quality of the roads, driving style and general wear and tear of the parts in the vehicle. To prevent unexpected breakdowns, diagnose the car in time and, if necessary, carry out repair work.

Summing up the article, we note that you now know how to replace a vacuum amplifier on your VAZ-2114, as well as how to diagnose a system malfunction.How to carry out the replacement, independently or at a service station - it is up to you to choose.

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