How to bleed brakes on a VAZ 2115

Welcome! Bleeding the brakes is the most important part after replacing any unit in the brake system, or even after replacing the brake fluid itself with a new one. This procedure must be carried out in the cases described above, that is, after replacing something in the brake system itself, if you neglect this procedure, then you will have air in the brake system due to which you will not be able to simply brake , and in the literal sense of the word, your brakes will not work, but the pedal will simply move when you press it and when you release it and that’s it, so it’s necessary to pump the brakes.

But not in all cases, your brakes will not work at all; generally, this only happens after replacing the brake fluid with a new one, that is, if you only replace any brake caliper (for example, the right one), then after all this you will not have Only the right brakes on the front wheel of the car will work, and all the others, including the rear ones, will work!

Note! To bleed the brake system, you will need to stock up on: Firstly, an ordinary small about one liter bottle, which must be transparent, as well as a small hose which will be inserted into this bottle with one end and the other will be put on the fitting for bleeding, so choose the thickness of the hose strictly along the neck of the bottle and at this very fitting (What kind of fitting we are talking about, you will find out in more detail in this article but a little lower), and you will also need to stock up on new brake fluid, preferably of the same brand, if you are not going to change it, as well as a wrench or a spanner, and an inspection hole or a lift!

When should you bleed your brakes? They must be pumped in all cases, as mentioned earlier, after replacing any part or the fluid itself in the brake system, because when replacing, air enters the system and the car will not brake after that.

But air can also get in for other reasons, for example, when the brake system depressurizes, which can happen when any brake hose bursts, as well as when the master or working brake cylinder is deformed, due to which air enters the system and will not allow you to stop the car normally.

Preparation

The first sign that there is air in the system is when the pedal that activates the brake becomes depressed.
Moreover, if you press and release it several times, it falls into place. Of course, with such unstable operation of one of the most important elements of a car in terms of safety, it is dangerous to go outside. Therefore, we recommend starting pumping immediately. Please note that the described symptom may also indicate other breakdowns. This is about:

an excessively large gap formed between the piston of the main cylinder and the bolt that regulates the operation of the vacuum booster;
liquid leakage due to depressurization of communications;
damage to the rear cylinder thrust ring (it usually fails).

Each of these problems needs to be addressed as a priority. Only after this does it make sense to start pumping.

There is one more important circumstance. Be sure to only use the brand of brake fluid that is already in the system.

It is advisable to involve an assistant in the work, so pumping is done faster and with less labor. We will tell you below what to do if you couldn’t find a partner.

a transparent jar or plastic bottle with a capacity of 1.5 liters;
flexible tube (rubber, silicone, etc.);
a set of keys;
clean rags.

It should also be understood that air is removed from the VAZ-2115 system in a certain order. First, the procedure is performed for the rear wheel (for example, the right one), and then the front one (respectively, the left one). That is, you need to act diagonally.

Preparatory stage

If you decide to bleed the brakes yourself, it is important to know that when bleeding you must use the same brake fluid as the one in the system. No other liquid can be used. You must first check the tightness of the system. To level up you need one more person. You will also need a hose of a suitable diameter for the bleeder fitting, a glass or plastic container (transparent), a wrench and a rag for cleaning the caps.

It is very important to know in what order to remove air from the brake system. This procedure must be carried out diagonally, alternating the rear and front brakes:

rear right;
front left;
rear left;
front right.

Leveling up

First, open the hood of the VAZ-2115. The brake fluid reservoir (TF) is located here. Remove the cap from it and check if it is filled properly. If the level does not reach the “max” mark, then add the missing volume.

Next, do this:

unscrew the cap covering the fitting on the rear wheel brake cylinder;
pour a little TJ into a transparent jar;
Pull the hose onto the fitting (it should fit as tightly as possible);
Immerse the other end of the tube in the container so that it is below the liquid level.

Now the assistant should take the driver's seat. Here he smoothly and carefully presses the brake pedal at least 6-8 times. Between pumping, you need to pause within 2 seconds.

At the end, the partner presses the pedal and leaves it in the lower position. At this point, you should loosen the fitting no more than 2 or 3 turns. A key is used for this.

If everything is done correctly, liquid will begin to flow out of the hose. Watch carefully - air bubbles will come out along with it. It is necessary to stop pumping no earlier than they stop appearing. When only the fuel fluid starts to flow, tighten the fitting. After this, the partner is allowed to take his foot off the pedal.

During the process, it is important to constantly monitor the tank - you must not allow it to become empty. If this trouble occurs, then pumping will have to start all over again. Proceed in the same way with the remaining wheels of the VAZ-2115.

Replacement

To replace the TJ yourself, you will need a certain set of tools and materials. This set includes:

Brake fluid - 500 millimeters;
A set of keys;
Screwdriver Set;
Transparent flexible hose;
Container for draining old fluid;
Dry rags for cleaning surfaces.

To work, you will definitely need the help of one more person, so when pumping, one should be inside the car, and the other outside.

Let's start the procedure.

Unscrew the cap on the master cylinder reservoir and place it on a prepared surface. The cover is combined with the float of the fuel oil level sensor, so be careful, because a toxic and dangerous substance will remain on it.
Unlock the rear brakes using a screwdriver. It is simply inserted between the plate and the piston. Ready.

Clean the right rear brake release valve of any accumulated dirt and dust, then remove the rubber cap that covers the valve.
Place a flexible transparent hose onto the valve fitting and place its other end in a container to drain the liquid.
Approximately once every two seconds, press the gas pedal all the way four times in succession. When you press the fifth time, lock the pedal in the clamped position.
Unscrew the valve at least half a turn. As the brake fluid drains, the pedal will gradually begin to sink.
As soon as the fluid flow stops, close the valve.
Simultaneously with the procedure, do not forget to monitor the level of fuel fluid in the tank.
As you pump out the old substance, add a little new one. This will avoid the formation of air locks inside the system.
Add fresh fuel fluid into the tank until all the old fluid comes out and new clean substance begins to flow through the hose into the container.
Having completed the work on the rear right wheel, go to the front left and perform a similar procedure. Due to this movement pattern, you will be able to completely get rid of the old fuel oil in one circuit.
By analogy, remove the fuel fluid from the second circuit in the same sequence. Having completed draining, close the valves with caps and add new fuel fluid to the required level.

After completing the replacement procedure, be sure to bleed the brakes. It is strictly not recommended to go out on the road without it, since the brakes may simply not work.

Why bleed the brakes?

Bleeding a vehicle is a preventive measure aimed at ensuring stable operation of the brakes. The point is to remove foreign liquid and excess air.

Air and excess liquid can appear in the system for various reasons. Namely:

The hoses are damaged and their integrity is compromised;
Low-quality brake substance is used;
System elements were replaced or brake fluid was updated;
The seal of the vehicle is broken.

Any braking system, due to its design, can spontaneously accumulate moisture inside itself. Therefore, pumping cannot be ignored under any circumstances.

Self-leveling

It is not always possible to attract an assistant to work.
Here the question arises: how to bleed the brakes yourself, and, in general, is this realistic in the case of the 2115 VAZ model? The answer will be yes. To perform the operation discussed in this article, you must use a compressor. A device is required that can maintain the pressure in the system at least 2 atmospheres. The pedal is not activated in this situation.

The work is done like this:

select a cap suitable for replacing the one that is screwed onto the fuel tank of your VAZ-2115 (suitable for canisters in which motor oil is sold);
drill a hole with a diameter of 14 mm in it;
insert the fitting from the tubeless wheel into the hole;
the joints must be treated with sealant;
fill the tank with liquid to the maximum mark;
Unscrew the cap from the brake cylinder fitting;
put on the tube and place the other end in the bottle;
Connect the compressor to the tank and activate.

When the air stops coming out, tighten the fitting and move to the other wheel.

At the last stage of the procedure, it is necessary to add brake fluid to the reservoir intended for it to the maximum and screw the cap tightly.

Next, all that remains is to check how the system works after removing the air.

When is pumping required and how to prepare for it

Bleeding the brakes is not always necessary - if the brake system is functioning properly, then bleeding is not necessary.

It is required only in the following three situations:

When the pedal begins to “fail” (as was mentioned at the very beginning of the article).
After replacing any component of the brake system.
After replacing the fluid.

All these situations are caused by one single reason - air entering the system. So, if the pedal began to “fall” by itself, then, most likely, the brake tract was depressurized in some area, and air leaked inside.

When replacing parts, air also enters the brake system in large quantities and remains inside, causing its failure (the same applies to a complete replacement of the brake fluid).

It is important to note that it is highly advisable (or, more correctly, mandatory) to do bleeding immediately after repairing the brakes or replacing the fluid, without driving a “not pumped” car - after all, this can pose a more than real threat to life.

A mandatory condition that should always be observed is the order of bleeding the brakes of the VAZ 2114. So, the left rear wheel is pumped first, followed by the right front, then the right rear and then the front left.

In preparation for bleeding the brakes, you need to perform the following preparatory work:

install the car on the handbrake;
disconnect the liquid level sensor connector from the tank and secure it;

open the tank lid;
add brake fluid to the maximum level (MAX mark);
insert a slotted screwdriver into the rear adjuster between the rod and the bracket (this should only be done when bleeding the rear brakes; when starting to bleed the front brakes, it should be removed).

Pumping - important nuances

In a situation where repair work was carried out on only one cylinder, then bleeding is done only on it - there is no need to touch the other wheels.

If your 2115 has ABS, there are a few things to keep in mind. Before bleeding, you should turn on the ignition, and only after that press the brake pedal at least 4 times. Then fill the tank with TJ to the maximum and then proceed as described above.

When work is done on the rear wheels, the ignition is not turned off. This allows you to use the ABS system pump - it will create the necessary pressure.

Bleeding brakes on VAZ 2113, VAZ 2114, VAZ 2115

Where did the air come from?

Air in the brake system may appear for the following reasons:

Got in while changing brake fluid (How to change brake fluid?).
Got it when replacing any brake elements, for example when replacing a brake cylinder (How to replace a rear brake cylinder?).
Air may also appear due to a leak in the brake system, for example, cracked brake fluid pipes that need to be replaced immediately.
The rear brake cylinder is leaking.
The front brake cylinder is leaking.
A leaky GTZ (brake master cylinder) can also be a problem.

Important: Over time, water gets into the brake fluid, as evidenced by its darkening. In this case, you need to replace the brake fluid. And in general, it is recommended every three years or 45 thousand km. mileage, change the brake fluid, because One way or another, condensation accumulates in it.

Also, prevent brake fluid from getting on the car body, otherwise it will easily wash away the paint to bare metal.

How to bleed the brake system on a VAZ 2113-VAZ 2115?

Note! Bleeding the brakes is carried out on a car with an assistant, although it is possible without one, but it will be more difficult, and the article itself is written on bleeding the system only with an assistant!

On cars of the Samara 2 family, the bleeding system must be replaced in sequence, namely first the rear right wheel, then the front left, then the rear left and only after that the front right, generally diagonally starting from the rear wheel first!

1) At the very beginning of the operation, open the hood of the car and then unscrew the cap of the reservoir containing the brake fluid by hand. (The location of this cover is indicated by an arrow in the photo below, but only it is turned out)

2) Then, if possible, take brake fluid of the same brand, and add it to the MAX mark in the same tank, and if you bought new fluid and decided to replace it, then for more detailed information on replacing brake fluid, see article: “Replacing brake fluid on a VAZ.” (By the way, in this article to which a link is given, at the very bottom there will be a section “Important!”, be sure to read it, a lot of interesting things are said there)

3) Next on the rear right wheel, find a small cap that covers the bleeder fitting, and after you find this cap, remove it and clean it of dirt.

4) After this cap is removed from the fitting, take the pre-prepared hose in your hands and put one end of it on the fitting, and lower the other end into a transparent plastic bottle, preferably. (If you don’t understand about the hose and the bottle, then for an example with a hose and this very bottle, see the photo below in paragraph “6”)

Note! The bottle into which you will lower the hose must be filled with brake fluid and the tip of the hose must be in this very fluid!

5) Then, when everything is done, tell your assistant to get behind the wheel of your car and then let him smoothly press the brake pedal 7-8 times and at the very end, that is, when he presses the last eighth time, let him press this pedal will remain pressed all the way.

6) And at this time, start using a wrench to carefully unscrew the bleeder fitting, but in no case do you need to unscrew it completely, you just need to loosen it a little by 2-3 turns and after which you should see how the brake fluid goes into the bottle liquid.

Note! Wait and watch carefully how the brake fluid drains, by the way, you will see in it those same air bubbles that should not be present in the system under any circumstances, so continue to drain the fluid from the system until the release of bubbles into the bottles stops, and when the release of bubbles will stop, then screw the fitting all the way and only after that let your assistant take his foot off the pedal!

Sequencing

First you need to open the hood of the car and open the cap of the brake fluid reservoir. Make sure it is filled to the maximum. If not, add to about. After this, follow the steps in the following sequence:

On the rear right wheel, find the cap that covers the fitting. Remove the cap and clean it of dirt.
Fill a clear glass or plastic container with brake fluid.
Place one end of the hose onto the fitting and place the other end into a glass or transparent plastic bottle. The hose must be lowered into the liquid.
Ask your partner to sit behind the wheel and gently press the brake pedal 7 times with breaks of 2 seconds. After this, he must press the pedal again and leave it in this position (pressed all the way).
While an assistant holds the pedal, use a wrench to unscrew the fitting 2-3 turns.

After all these steps, you will see that brake fluid will flow into a transparent container through the hose. Watch how it drains.

There will be visible air bubbles in it that need to be removed. Drain the liquid until the bubbles disappear. Then screw the fitting back on. Only after this can your assistant release the pedal. When the liquid flows into the container, monitor its level in the tank. If necessary, add brake fluid. If during pumping it completely leaks out, you will have to start the whole procedure from the beginning.

Repeat similar steps for each wheel in the above sequence. This mechanism of action is suitable not only for the VAZ-2114, but also for models 2113, 2115.

Many car owners are wondering: is it possible to carry out pumping alone? Yes it is possible. Only in this case, the pressure should be produced not by pressing the pedal, but by using a powerful compressor for these purposes. It should create a pressure of 2 atmospheres.

Car owners have to carry out pumping in different situations. Air can enter when replacing copper pipes at the rear or other components of the brake system, when hoses are damaged, when replacing brake fluid, or if the seal in the unit is broken. Regardless of the reason, after air enters the GTZ (brake master cylinder), bleeding must be carried out. Otherwise, the brake simply will not work.

How to bleed the brakes on a VAZ-2115 with your own hands?

Perhaps the most important component in any car is the brake system. It is this that allows you to slow down the car in time, ensuring traffic safety. Today, most passenger cars use a hydraulic braking system. And the cars of the Samara-2 family are no exception. Car owners should know under what circumstances they should bleed the brakes of a VAZ-2115 and how to do it correctly. All this will be discussed further in our article.

Signs to watch out for

In what cases should this operation be performed? The main reason that leads to pumping is air accumulated in the system. It can get inside for various reasons. As a rule, this is a malfunction of the brake cylinders or leaking hoses. Very rarely, air gets in due to a weak connection of the fittings, but this possibility should not be ruled out.

How to determine that air has formed in the system? The driver will notice changes in the behavior of the car. So, when you press the pedal, the car will not reduce speed as effectively. And the pedal itself will be more sluggish and have an increased stroke. The situation is critical when it completely falls into the floor, and the car barely slows down. In this case, it is urgent to bleed the front and rear brakes of the VAZ-2115.

This operation is also required when replacing brake fluid. If it has not been updated for more than three years or has become black, it definitely needs to be replaced. In addition, some fluids are changed when buying a car on the secondary market, when there is no confidence in the reliability of the system. Bleeding may also be required when doing any work on the brake system. This may include replacing the reservoir, working or master cylinder, hoses and other elements. It is not pumped only when replacing the pads, since the working cylinders are only recessed here (both in the case of front disc mechanisms and rear drum mechanisms).

Required tools and materials

To get to the fittings in the absence of an inspection hole, we need to unscrew the wheels. Therefore, you need a jack, stops and a wheel wrench. If there is a hole or overpass, the wheels do not need to be unscrewed. You will also need new brake fluid. On vehicles of the Samara-2 family, RosDot of the fourth class is used. In addition, we need a plastic bottle and a hose that will be put on the fitting (so that the liquid does not splash in different directions, but goes out into a certain container). To unscrew the fitting, you need a regular 8mm wrench.

Preparing for surgery

So, put the car in a pit or on a flat surface, then open the hood and remove the connector for the brake fluid level sensor. Then unscrew the cap and add liquid to the maximum level. After this, screw on the lid.

Please note: if you use a lift during the work, when bleeding the rear brakes you need to place the slot in the brake force regulator (also called the “sorcerer”). To do this, you can use a screwdriver by placing it between the rod and the bracket.

When bleeding the front brakes, this slot must be removed.

How to bleed the brakes on a VAZ-2115? During the work we will need one assistant. He will press the brake pedal on command.

Instructions for the last chapter in one video

Yes, as on most cars, bleeding is done crosswise, but I would advise changing the old brake hoses, pads and brake fluid for a brake system that does not fail. It’s better to spend money once and forget about the brakes than to constantly crawl under the car.

Pumping is not difficult, call an assistant and pump them according to the instructions in the manual. Just keep an eye on the brake fluid level when bleeding. After bleeding, drive off with caution. Until the pedal becomes hard and the pads are in place.

Let's get started

Let's look at how to bleed the brakes on a VAZ-2115 with your own hands. So, first we need to find the fitting on the back of the rear wheel drum.

It will be closed with a protective cap. We need to remove the last one. Next, put a hose on the fitting and direct it into a plastic bottle. After this, we need the help of a second person who, on command, will press the brake pedal several times. This must be done about four to five times at intervals of one to two seconds in order to create pressure in the system. When pressed for the last time, the pedal is held to the floor. At this moment we carefully unscrew the fitting. It is important to unscrew it smoothly, since at first the liquid will flow under very high pressure. As the fluid comes out, the assistant will feel the pedal sink to the floor.

Features of work on models starting from VAZ-2108

Now let’s look at the specifics of the operation on other cars of the VAZ family. Starting with model 2108, the circuit diagram has changed, and therefore the sequence is somewhat different. And you need to know it before bleeding the brakes on the VAZ-2108, 2109, 21099.

These cars already use a diagonal arrangement of contours. That is, one of them combines the rear left and front right wheels, and the second - the other two.

Bleeding begins, as usual, from the farthest wheel, that is, from the rear right one. An operation to remove air from its brake mechanism is carried out according to the described sequence.

But there is one caveat. The design includes a pressure regulator for the rear wheel drive mechanisms. If the rear of the car is hung out before bleeding, this regulator must be unlocked. To do this, just install a screwdriver between the regulator rod and the thrust plate.

After all work it should be removed.

Then it is pumped to the second rear wheel, and the front left one, since it is the one that is combined with the circuit with the already pumped rear mechanism.

After pumping each mechanism, it is necessary to check the level in the tank. If you omit this point, then during operation the liquid will go into the system and air will enter it again.

Brake system VAZ 2115

Safety when driving a car is ensured by several systems, however, the main role is still assigned to the car's brake system. Timely braking saves you from traffic accidents, and the hand (parking) brake helps to secure the car on an inclined surface. It is these elements of the car that need to be given special attention. Timely diagnostics and repairs will help protect you and your car.

Malfunctions

Possible malfunctions of the brake system and methods for eliminating them are given in the table:

Increased brake pedal travel

Leakage of brake fluid from wheel cylinders

Replace failed parts of wheel cylinders, wash and dry pads, discs and drums, bleed the hydraulic drive system

Air in the brake system

Remove air from the system

Damaged rubber o-rings in the master cylinder

Replace the rings and bleed the system

Damaged rubber hoses for hydraulic brakes

Replace the hoses and bleed the system

Increased runout of the brake disc (more than 0.15 mm)

Sand the disc; If the disc thickness is less than 17.8 mm, the brake disc should be replaced

Fluid leakage through the pressure regulator pusher O-rings

Replace O-rings

Insufficient braking performance

Oiling of brake pad linings

Wash and dry the pads

Piston jamming in wheel cylinders

Eliminate the causes of jamming, replace damaged parts, bleed the system

Complete wear of the brake pads

Replace the brake pads

Overheating of brake mechanisms

Stop immediately and let the brakes cool down.

Using pads with mismatched linings

Use only pads recommended by the manufacturer

Incorrect pressure regulator adjustment

Adjust the pressure regulator drive

Loss of tightness of one of the circuits (accompanied by partial failure of the brake pedal)

Replace damaged parts, bleed the system

Incomplete release of all wheels

There is no free play in the brake pedal

Adjust pedal free play

The protrusion of the adjusting bolt of the vacuum booster rod relative to the mounting plane of the master cylinder is impaired

Adjust the protrusion of the 1.25-0.2mm adjusting bolt

Swelling of the rubber seals of the master cylinder due to gasoline, mineral oils, etc. getting into the liquid.

Thoroughly flush the entire system with brake fluid, replace rubber parts, bleed the hydraulic drive system

Master cylinder piston jamming

Check and, if necessary, replace the master cylinder, bleed the system