How to change brake fluid in a car with and without ABS

How to change brake fluid in a car with and without ABS? – Automotoguru

in half The anti-lock braking system units in the form of a pressure sensor and a hydraulic unit are integrated into the standard brake circuit. In addition to them, wheel speed sensors and a control unit are installed. By analyzing the speed of rotation of the wheel, the system maintains the optimal pressure in the circuit, preventing it from blocking.

Analysis of types of existing systems

At first glance, replacing ABS brake fluid is a trivial procedure.

However, the modern auto industry forces one to take into account trends in the field of safety: in almost all cars, the anti-lock braking system is combined with the EBD brake force distribution system and the ASC traction control algorithm. However, these units are often controlled by ESP - the exchange rate stability system.

With such high-tech packages available, the procedure should be carried out exclusively in authorized service centers. The reason is the need to connect a diagnostic scanner to the computer. For the same reason, it is impossible to carry out the replacement yourself on cars where the pump with a hydraulic accumulator and the valve system are designed as separate assembly units.

It is possible to service the system on your own only on a car with this configuration: the hydraulic accumulator and the valve block are connected in one unit.

Preparing to replace the brake fluid of a car with ABS: conditions and necessary tools

When servicing a vehicle's deceleration system, free access to the working cylinders of each wheel is necessary. Therefore, the most suitable place for work is an inspection ditch or overpass.

When performing the procedure, you will need an assistant and a set of equipment:

set of open-end wrenches;
a large-volume medical syringe and a hose about 10-15 cm long corresponding to the diameter of the tip (an alternative is a pear);
container for extracted brake fluid;
tube 20-30 cm long; diameter – slightly smaller than the diameter of the fitting on the brake cylinders (to ensure tension).

Technology for changing brake fluid on vehicles with a combined hydraulic accumulator and valve block

The operation of replacing brake fluid in a system with ABS is carried out in several stages:

draining the existing composition from the tank;
pumping of highways;
bleeding the ABS module.

The problem of draining the working fluid from the expansion tank located in the engine compartment is solved as follows:

pump out the liquid from the tank with a syringe;
fill the new composition to the maximum mark (MAX, High);
close the container.

Filling Turning off the ignition and disconnecting the power connectors on the reservoir lid, you should begin bleeding the hydraulic system. The classic purge cycle looks like this:

put the hose on the fitting of the brake cylinder located behind the wheel (put the other end into a previously filled container);
Unscrew the fitting with an open-end wrench 1 turn;
Push the brake pedal 3-5 times and hold it down (performed by a partner);
After the liquid has stopped flowing, tighten the fitting and release the pedal.

Notes:

the criterion for stopping the repetition of the cycle is the absence of air bubbles and visually clean liquid, indicating the removal of the old working fluid;
since in the system under consideration the rear brake line is under high pressure, only the front brakes can be pumped in the classical way (first the left, then the right).

Bleeding the rear circuits connected to the ABS equipment is carried out together with bleeding the anti-lock braking module. Actions with the right rear cylinder:

connect the drain hose and open the fitting;
hold down the brake pedal;
turn on the ignition;
after the release of air bubbles stops and a new composition appears, tighten the fitting;
release the pedal;
turn off the ignition.

After replacing the brake fluid in the three circuits of the ABS system, the rear left line should be bled:

connect the hose to the fitting and unscrew the latter 1 turn;
turn on the ignition;
mark the end of the release of air bubbles and the new composition;
give a command to your partner to press the pedal halfway;
tighten the fitting;
release the pedal;
wait for the pump to finish running (ringing sound frequencies should be replaced by low ones);
turn off the ignition.

After the operation is completed:

bring the liquid level to maximum;
connect the connectors to the tank lid;
check the lines for leaks.

Alternative solution to the issue

vacuum tank The operating manual for a car with ABS may stipulate the presence of a drain fitting in the design of the anti-lock module. To service such a system, you may need a compressor or a homemade installation in the form of a pear and a modified brake fluid reservoir cap. The replacement technology in this case looks much simpler:

remove the used liquid from the container and fill it with new one;
bleed all four brake cylinders using the classical method according to the scheme specified by the manufacturer;
install a special adapter for the compressor or a home-made installation instead of the “brake reservoir” cap;
connect a hose to the drain fitting of the anti-blocking module and unscrew it 1 turn;
create a pressure of about 1 BAR;
identify the end of the release of old liquid and bubbles;
relieve pressure.

When replacing used brake fluid with new brake fluid in an ABS system, the following notes should be taken into account:

constant monitoring of the liquid level in the tank is necessary: a decrease below the minimum mark (MIN, Low) is not allowed;
The permissible operating time of the hydraulic pump is 2 minutes; if it is exceeded, turn off the ignition and allow the unit to cool for 5-10 minutes.
before draining the fluid, it is necessary to “discharge” the system by pressing the brake pedal at least 20 times;
It is strictly prohibited to pour used liquid or a composition that has stood for a long time in an open container;
When you turn on the ignition and the drain plug is open, you should be prepared for a sudden release of liquid.

Summary

You can replace the fluid yourself only on cars with a hydraulic accumulator and valves combined into one unit. List of required equipment:

syringe with extension tube or bulb;
transparent containers;
transparent tube 20-30 cm long;
open-end wrenches at “8” or “10”.

Briefly about the procedure for replacing brake fluid in a car with ABS on your own:

replace the composition in the tank with a new one;
bleed the left and right front brake cylinders;
bleed the rear right cylinder with the brake pedal depressed and the pump turned on;
bleed the rear left cylinder with the brake pedal released and the hydraulic pump turned on;
check the system for leaks.

If there is a drain fitting on the ABS module, you should use the classical method according to the scheme specified by the factory to bleed all 4 brake cylinders, and then “drive” the ABS installation with excess pressure supplied from outside.

Replacing brake fluid is an important point in car maintenance, since the health of the brake system is the key to the safety of the driver and his passengers. The hydraulic braking system is based on the transmission of force from pressing the brake pedal to the wheels through a special brake fluid.

Brake fluid is an excellent “transmitter” of the driver’s foot force to the wheel brake cylinders. Since fluids have a minimum degree of compression, energy from the master cylinder is transferred to the working (wheel) brake cylinders without distortion.

Be sure to watch the video instructions on how to change the brake fluid in your car yourself, which is located at the end of this article.

Brake fluid replacement timing

Car manufacturers recommend that the brake system fluid be completely renewed after approximately 40 thousand kilometers or once every 1.5-2 years under normal vehicle operation. Some car enthusiasts believe that nothing can happen to the fluid in a closed brake circuit. Therefore, there is no need to change it.

In fact, there are compensation holes in the expansion tank of any hydraulic brake system. Through them, the liquid communicates with the atmosphere. And the main disadvantage of the “brake seal” is its hygroscopicity or ability to absorb water from the air. The more moisture gets into the brake fluid, the worse it copes with its duties.

Special testers allow you to check the condition of the brake fluid. They determine such an important parameter as the boiling point. Based on the readings of the device, one can judge the performance of the brake system.

If the tester shows a value of 175 degrees or higher, then the brake fluid can continue to be used.
If the value falls within the range of 165 to 175 degrees, brake fluid can only be used if its age does not exceed a year.
When the device shows a boiling point below 165 degrees, urgent replacement is necessary.

In addition to the natural “wear and tear” of the brake fluid, there are other reasons for replacing it.

Mixing different types of fluids will result in reduced performance. This often happens when the car owner does not know what kind of brake fluid is in the car. Wanting to replenish the level, he buys liquid to top it up at random. As a result, a complete replacement of the cloudy and dirty “slurry” is required.
A leak in the brake system leads to rapid saturation of the fluid with oxygen. At the same time, the boiling point decreases and an urgent replacement of the brake fluid is required.

More complete information about automobile brake fluids can be found in our article: “Brake fluids for automobiles: types, properties, labeling.”

Preparing to change brake fluid yourself

In some modern cars with complex “sophisticated” ABS, ESP and SBC systems, it is easier to replace the brake fluid at a specialized car service center. This will take a little time (about 30 minutes), the system will not be air-filled, and the price is within 1000 rubles. not so scary.

For those who like to save money, and also in the absence of trust in the service station employees, you will have to change the brake fluid yourself. To work you will need several tools, devices and materials:

a soft transparent tube, the inner diameter of which corresponds to the outer diameter of the bleeder fitting on the wheel cylinder;
an open-end or socket wrench for unscrewing the “bleeder”;
container for collecting used brake fluid;
new fluid;
reliable assistant.

It is better to carry out the work in a viewing hole or on an overpass. If you can get to the bleeder fittings from below with a wrench and a tube, then it is not necessary to remove the wheels. Otherwise, you will need a jack and a wheel wrench, and you will also have to spend extra time dismantling and installing the wheels.

Source: https://avtomotoguru.ru/kak-pomenyat-tormoznuyu-zhidkost-v-avtomobile-s-abs-i-bez/

How to change brake fluid in a car

In fact, all fluids in a car lose their properties after some time, so they need to be replaced from time to time. Brake fluid is no exception, because... The safety of the car depends on its quality. This article will tell you how to change the brake fluid in a car.

Brake fluids from various manufacturers, without exception, actively absorb moisture from the air.

If the moisture content is more than 3.5% of the brake fluid, the boiling point of the fluid will decrease significantly. This can contribute to the failure of the car's braking system during sudden stops.

Moisture absorption occurs, most often, through the reservoir “ventilation” system, sealing flaps and through the seals of the brake system.

Certified instruments that help to correctly determine the condition of the brake fluid are not freely available. That is why auto manufacturers advise replacing brake fluid from time to time, approximately every 2-3 years of use, especially if its color changes, in case of safety .

We replace the brake fluid in the car ourselves.

The brake fluid can be replaced either independently or using special equipment. Each method has its own advantages and disadvantages.

If you change the brake fluid yourself, the car owner will spend about two hours, but will need an assistant for the job. And replacing the fluid with special equipment will naturally cost more, but one auto mechanic can handle this task in just 15-20 minutes.

The installation will replace the fuel fluid under a pressure of 1.5 to 2.0 atmospheres, which will thereby lead to a low probability of airing the brake system, including the ABS system.

Car enthusiasts can afford to replace brake fluid on cars without an ABS system and with it, when the hydraulic accumulator, pump, and hydraulic valve block are in one unit. It is advisable to replace brake fluid in cars with an integral ABS system using a special scanner.

The brake fluid is replaced one by one in the brake system circuits (the design of the brake system can be found in the technical description of the vehicle or by the location of the brake system lines).

Start work from the wheel furthest away from the brake master cylinder:

in the case of a parallel circuit diagram - from the right rear wheel, after which everything happens in turn - first the left rear, then the right front, and finally the left front wheel.
With a diagonal circuit diagram, work begins with the right rear wheel, then proceeds to the left front wheel, the left rear wheel, and ends with the right front wheel.

It is best to replace the brake fluid on a car with the wheels removed, on an inspection pit or overpass. If there are no such conditions, then it is advisable to choose a flat area and, successively “jacking up” the car, remove the wheels.

The car must be in gear.

Whether it will be convenient to replace the brake fluid depends on the location of the bleeder fittings - where, and also at what angle they are placed on the brake cylinders.

To work, you will need approximately 1 liter - 1.5 liters of new brake fluid, a translucent hose (diameter 5-6 mm), and a container (for example, a 1.5 liter plastic bottle), as well as 9 and 11 socket wrenches.

The need for pumping.

During operation and maintenance of the machine, it is possible that air can penetrate into its braking system , and this contributes to a decrease in performance. The brake pedal notifies you of this – it becomes surprisingly “soft” and “freezes” at the very floor.

find out which circuit is faulty by looking at the braking distance of the car's wheels. To do this, at a speed of approximately 60 km/h, abruptly stop the car on a flat and dry surface. The tread mark of the wheel that is later, or does not block at all, is a sign of air in the brake mechanism.

In order to remove air, the brake system must be bled. If the fluid is changed at a service station using special equipment that supplies brake fluid under pressure, the brakes may not be pumped.

Before starting work, you need to make sure that the brake drive components are tight, and then fill the reservoir with brake fluid to the maximum.

Bleeding can only be done with an assistant who will operate the brake pedal according to your instructions.

You should put on the fitting of the mechanism of the wheel that you are pumping a “installation” that is used to replace the brake fluid - a hose, the free section of which is placed in a container with fluid.

Next, you need to sharply press the brake pedal at least 4-5 times so that high pressure is created in the system and air bubbles “break away” from the surface of the channels.

At the moment when the brake pedal is held by an assistant, it is necessary to unscrew the fitting by ½ - ¾ of a turn. While the brake fluid is being forced into the prepared container, the presence or absence of air bubbles in it should be monitored. After the brake pedal is pressed all the way, tighten the fitting. These operations must be repeated until air bubbles disappear from the leaking liquid.

In all cases of replacing or adding brake fluid, it is not recommended to reuse fluid that has been stored open for a long time or previously drained, because in this case, there is a high probability of its contamination or saturation with water and air.

Handbrake!

After bleeding the system, free movement of the brake pedal may increase. Most often, the reason is a malfunction of the pad gap compensation mechanism in the rear brake drum mechanisms (usually, it automatically adjusts to the thickness of the pads as they wear out).

If, after repeatedly pressing the brake pedal and moving the handbrake handle, clicking noises in the brakes are not heard, but the pedal travel is still increased , it is necessary to inspect the wheel brakes and repair them.

Source: http://PortalVAZ.ru/kak-pomenyat-tormoznuyu-zhidkost-v-avtomobile/

Checking the level and replacing brake fluid yourself, video

Many car repair and maintenance operations can be done with your own hands. Replacing the brake fluid (BF) is also included in this list.

Before starting the instructions, it is worth understanding some questions:

Why do you need to change brake fluid?
How to measure brake fluid correctly?
Replacing brake fluid in ABS.

Why do it yourself if you can take the car to a service station? To be sure that the work was carried out efficiently: the diagnostics were carried out 100%, the level was met, the replacement took place according to all standards. Well, saving is always nice. In the case of this work, the saying “If you want something done well, do it yourself” fits perfectly.

The main job of brake fluid is to transfer energy from the main brake cylinder to the wheel (worker) brake cylinders, and then to the brake pads.

Each manufacturer determines the frequency of fluid changes, but usually it is changed after 30-40 thousand kilometers or after 1.5-2 years. This is an average frequency suitable for the general circle of drivers.

It needs to be changed because it loses its properties over time.

Also, brake fluid is replaced when the entire brake system malfunctions. This usually happens when moisture gets inside the system. Brake fluid is hygroscopic, so when moisture gets into it, all beneficial properties are lost. Even the most modern cars do not yet have a completely sealed brake system, so moisture will leak out sooner or later.

The best decision would be to buy the brake fluid recommended by the manufacturer of your car. So, the replacement should begin with studying the car’s operating instructions. Next, you need to learn how to check the brake fluid level in your car.

Checking the fluid level

The easiest way to check is visual. The brake system reservoir is located in the engine compartment. If you have a more or less modern car, then the tank should be made of plastic, just for ease of inspection. If so, then one glance is enough for you to find out the level. The “min” and “max” marks will tell you when you need to add fluid and when there is enough.

If you notice that the fluid level has dropped significantly, then it would be reasonable to check all visible places with components and pipes that relate to the brake system.

It is also worth considering the time when the brake pads or brake discs were last replaced. Their wear also affects the drop in fuel fluid level in the tank.

Cars with an ABS system have their own nuances, which we will definitely return to after the replacement instructions.

As for the serviceability of the entire braking system, you can find out about it from the instrument panel (again, if the car is modern). There is a light in the cabin indicating the fluid level. The manual for your car will help you find out what kind of light bulb it is.

Do not neglect the readings of this device. We strongly recommend that you stop the car if this light makes itself felt - you need to find out the cause of the breakdown. The light comes on when the sensor installed in the fuel tank has detected a low level.

It is best to add fluid and go to a car service center.

So, you decided to do everything on your own. First of all, you need to find out what type of brake system is in your car. If you have ABS, then the best solution would be to contact a car service center. If you happen to be the owner of a car without ABS, then you can safely replace it yourself. It's best to start with the right rear brake unit:

Find the tank cap on the main cylinder of the brake system and unscrew it. Please note that liquid may leak from the float, so it is better to place it on an unnecessary rag.
If the rear wheels of the car are hanging out, then you will have to unblock the pressure of the brake units. This is done using a small object that is inserted between the plate and the piston. When the replacement is completed, do not forget to remove this element.
Thoroughly clean the exhaust valve on all brake devices (especially the rear right one - it gets dirty the most). Next, remove the protective rubber cap from the valve. The easiest way to work is with a transparent hose - you need to insert it into a suitable container and slide it onto the fitting.
Next, it won't hurt you to have a friend's help. You need to pump the brakes: press the brake pedal 4-5 times, the interval between each press is 1-2 seconds. After the fifth press, he leaves his foot on the pedal.
Unscrew the exhaust valve half a turn. If done correctly, then the used fuel fluid should flow through the transparent hose. When it stops running, you will need to quickly tighten the release valve.
Do not forget to monitor the amount of fuel fluid in the tank - you must not allow the level to drop below the “min” mark. Actions from points 4 and 5 must be performed until new brake fluid flows from the brake system. But do not forget to monitor the level and add fresh fuel oil from time to time.
We perform the same actions with the opposite brake unit, and then move to another pair of brake devices: first the rear left, and then the front right. The procedure for bleeding the brakes must not be violated.
Be sure to tighten the rubber valve caps tightly after replacing the old fluid.
Now we return to the tank and add liquid to the maximum level a little (1-2 cm) not reaching the “max” mark. All is ready.

ABS system

If you want to try to replace the TJ in ABS on your own, then you need to know a few nuances.

If the valve block, hydraulic accumulator and pump are located in one unit, then replacement can be performed according to the previous instructions . If the ABS is separate, then you need to go to a car service center.

There, the craftsmen have special equipment for pumping fuel fluid under high pressure - with this option, there is practically no chance of air getting in.

If your car has SBC or ESP systems, then in this case independent replacement is completely impossible. Now you know how long to change the fuel tank and how to do it correctly. Do not forget about monitoring the fluid level in the tank. Good luck on the roads!

Replacing brake fluid in BMW X5 (video)

Source: http://motorltd.ru/zamena-tormoznoj-zhidkosti/

How to bleed ABS brakes yourself

Good day, dear car enthusiasts! There is most likely no driver among us who has not at least once experienced a feeling of helplessness at the moment of braking. When the car continues to move, and not at all in the direction the driver wants. Skid.

Fortunately, engineering does not stand still. The modern driver is armed with a system such as ABS. Let's take a closer look at the system and see if it is possible to bleed ABS brakes yourself.

What is car ABS

Bleeding the brakes without an assistant

ABS (Anti-lock Braking System) is an anti-lock braking system that prevents the wheels from locking during emergency braking.

The main task of ABS is to regulate the speed of rotation of all wheels. This is done by changing the pressure in the car's brake system. The process occurs using signals (pulses) from each wheel sensor that enter the ABS control unit.

The principle of operation of the anti-lock braking system
The contact patch of the car's wheels is relatively immobile to the road surface. According to physics, the wheels are affected by the so-called. static friction force.

Taking into account the fact that the static friction force is greater than the sliding friction force, ABS effectively slows down the rotation of the wheels at a speed that corresponds to the speed of the car at the moment of braking.

At the moment the braking begins, the anti-lock braking system begins to constantly and quite accurately determine the rotation speed of each wheel and synchronizes it.

Anti-lock braking system design
Let's list the main components of ABS:

sensors installed on the wheel hubs of a car: speed, acceleration or deceleration;
control valves installed in the line of the main brake system. They are also components of the pressure modulator;
ABS electronic control unit. Its task is to receive signals from sensors and control the operation of valves.

Bleeding brakes with ABS, taking into account the characteristics of the system

Bleeding an ABS brake system will require you to have certain technical skills. In addition, it will not be superfluous to first study the manual on the design and maintenance of the brake system of your car.

Features of bleeding brakes with ABS

in cars that have a hydraulic valve block, a hydraulic accumulator and a pump in one unit, replacing the brake fluid and bleeding the brake system with an anti-lock braking system is carried out in the same way as bleeding the brakes on a car without ABS, you need to turn off the system by removing the fuse. Bleeding of the circuits is carried out with the brake pedal pressed, the RTC bleeder fitting must be unscrewed. The ignition is turned on and the pump expels air from the circuit. The bleeder screw is tightened and the brake pedal is released. An extinguished malfunction light is evidence that your actions were correct.
Bleeding the brake system with ABS, in which the hydraulic module with valves and the hydraulic accumulator are separated into separate units, is carried out using a diagnostic scanner to retrieve information from the ABS ECU. It's unlikely you have one. Therefore, bleeding of brakes with ABS of this type should most likely be done by you at a service station.
Bleeding the brake system with ABS and electronic activation systems (ESP or SBC) is carried out only under service conditions.

How to bleed ABS brakes

It is important! It should be remembered that the pressure in the brake system reaches 180 atm. Therefore, in order to prevent the release of brake fluid, before disconnecting the brake lines on any system with ABS, it is necessary to discharge the pressure accumulator. To do this, with the ignition off, press the brake pedal 20 times.

Technology for bleeding the brake system with ABS

Bleeding brakes with ABS, like bleeding a conventional brake system, is done with an assistant. Turn off the ignition (position “0”). Disconnect the connectors on the brake fluid reservoir.

Front wheel brakes:

put the hose on the bleeder fitting;
open the fitting back;
the brake pedal is pressed all the way and held in the depressed position;
we observe the release of an “aired” mixture;
tighten the fitting and release the pedal.

Rear right wheel brake:

put the hose on the bleeder fitting, unscrew it one turn;
press the brake pedal all the way, turn the ignition key to position “2”. In this case, the brake pedal is held in the pressed position;
a running pump will expel air from the system. That is, as soon as the brake fluid begins to come out without air bubbles, close the fitting and release the brake.

Rear left wheel brake

The hose is put on the fitting and unscrewed 1 turn;
DO NOT press the brake pedal;
a working pump pushes out the “aired” mixture;
press the brake pedal halfway and tighten the fitting;
release the pedal and wait until the pump stops completely.

In reverse order: ignition key to “0”, connect the connectors to the brake fluid reservoir, check the brake system for leaks (see ABS fault indicator).

Good luck with bleeding your ABS brakes.

Source: http://CarTore.ru/44-prokachka-tormozov-s-abs-abs-svoi-osobennosti.html

How to Change ABS Brake Fluid ~ AUTOINTERLINE.RU

How to change brake fluid

Let's start with the fact that changing the brake fluid in a car is easy. The main thing is to have the desire and certain knowledge, because timely replacement of brake water, without exaggeration, can save your life.

Anyone can change a brake brake, but not every driver knows when to change it, and why such deadlines are set, but it’s better to know.

If you have a Russian car, then you definitely need to change the brake fluid after 40-60 thousand kilometers, depending on the make of the car, or after two years of operation of the car.

If it is a foreign car, then these characteristics are usually reduced; here you need to look in the instruction manual for the individual model.

Such timing for changing brake water is justified by the fact that the brake fluid, during operation of the car’s braking system, experiences very enormous loads, as a result of which its temperature can rise to 150 degrees, and from time to time up to 200 degrees.

Of course, depending on the brand, no matter what modern brake fluid, when it is still fresh, is able to withstand such loads and does not boil. But over time, its boiling point decreases, which worsens the performance of the braking system, and from time to time leads to its failure.

This happens because the brake fluid is hygroscopic and constantly absorbs water, and water, as is clear, has the lowest boiling point, as a result of which, during braking, vapor locks form in the system, the pedal fails, and braking efficiency decreases.

Therefore, it is necessary to change the brake fluid often and without fail.

So, let's move on to the main question, how to change the brake fluid.

First, find out whether your car has a parallel or diagonal circuit diagram.

If parallel, then the procedure for replacing the TJ will be as follows:

Right rear wheel;
Left rear wheel;;
Left front wheels;
Right front wheel.

If the scheme is diagonal, then the sequence is slightly different. More on this later.

Find out what brand of fluid is in your system. Although it is acceptable to mix a number of brands, it is still better if the brake water is replaced with the same brand that was filled.

Replacing brake fluid

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How to change brake fluid and bleed brakes on a Toyota Camry

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Buys TJ more than 1 liter.

We prepare a transparent hose of suitable diameter so that it is difficult to fit onto the air bleeder fitting.

We prepare a key for 8 or 10, this is easy to figure out.

We are preparing a container where the ancient TJ will be connected.

Accordingly, rags and gloves.

It is better to drive the car into a viewing hole or lift it with a lift.

Don't forget about your partner. The work must be done by two people.

the brake fluid alone , but it is very awkward and takes a lot of time.

The first option is a car without ABS, i.e. regular brakes

Basically, all brakes on modern cars are 2-circuit with a diagonal arrangement of circuits, so changing the brake fluid begins with the right rear wheel.

Remove the lid with the float from the additional tank, cover the hole with a clean rag.

Your partner sits in the driver’s seat, and you (or as you decide) sit near the right rear wheel.

Remove the protective rubber cap from the air release valve and place a hose on the valve.

We lower the other end of the hose into a prepared transparent vessel, maybe a cut-off plastic bottle, and it’s better if it contains a little old TJ.

The partner on your team begins to press the brake pedal sharply and forcefully 5-6 times, with the last time the foot rests forcefully on the brake pedal and at this moment you need to unscrew the air release valve half a turn.

An ancient TJ should go, which is usually black.

Once the liquid has finished flowing, close the valve and repeat the function again until the freshest liquid flows.

But do not forget that you need to monitor the water level in the additional tank and constantly add it there to the appropriate level.

After the rear right wheel, we move to the left front wheel, then to the rear left and only later to the right front wheel.

When replacing the brake fluid, make sure that fresh, light brake fluid comes out of the hose everywhere and do not forget to put the rubber caps back on.

In parallel with replacing the brake fluid , the entire brake system is also pumped, which is already very good.

Now let's look at how to change brake fluid on cars with ABS

In general, if you have brakes with ABS, and especially if the ABS units are not in one unit, then it is better to replace the brake fluid at a service center.

If the ABS components are concentrated in one block, then change the brake fluid in the usual way in a garage.

However, you can’t get by here without the ignition on.

Please note that the ABS pump operation should not exceed 2 minutes.

Be sure to monitor the fluid level in the additional tank, as this can lead not only to airing of the system, but also to failure of the pump.

ABS brake fluid replaced

I hope that thanks to this article, you will be able to change the brake fluid .

But before you start changing the brake fluid, study the car’s operating manual, because each car model has its own subtleties and nuances that you should know.

Source: http://autointerline.ru/kak-zamenit-tormoznuju-zhidkost-s-abs/

Replacing brake fluid in a car?

Despite all the warnings from vehicle manufacturers and detailed operating instructions, there are still citizens who are negligent about their brakes. They endanger not only themselves, but also those around them. Therefore, you need to clearly know and observe the frequency of changing brake fluid.

After all, replacing brake fluid in a car is a service procedure that does not need to be done often, but is necessary. The cost of replacing brake fluid is not so high as to save on it. It is worth contacting specialists if you are not confident in your abilities.

At the same time, given modern road speeds and the need for frequent and high-quality braking, skipping this procedure and letting everything take its course is highly not recommended.

This remark applies both to fairly old pieces of equipment and to modern cars that have ABS installed. Moreover, the anti-lock braking system in a car (ABS - Anti-lock braking system) depends even more on the quality of the brake fluid.

Today we will try to figure out how to change the brake fluid, when it is necessary, how often the procedure should be carried out - the replacement interval, how much brake fluid is needed for replacement, how to replace the ABS brake fluid and what is required for this.

“Let us immediately note that you can replace the compound even on a car with ABS on your own, but professionals at the service center will do it better and with better quality.”

Petr Khorokovsky – chief expert of the auto portal

Why does it need to be changed?

Any unit in a car, even during simple city driving, heats up significantly. Brake discs are no exception here.

Moreover, with an uneven and aggressive driving style, the process proceeds even faster, and temperatures become higher and reach 200 ° C.

Modern brake fluid is a fairly technologically advanced substance. In its production, significant advances in chemistry of recent years are used, which makes it possible to create a solution that can easily withstand heating up to 250°C. And only when this value is exceeded can problems occur. Dot class fluids have performed well (brake fluid dot 4, 5 and others).

It would seem, why bother then and why do you need to change the brake fluid?

The problem is that this solution easily absorbs moisture from the air and then the boiling point drops below.

Even with 2% water content, the boiling threshold is already on the border of 160-170°C, and these are quite achievable values with certain driving styles.

Further absorption of moisture lowers the bar even lower and then the machine begins to malfunction. Therefore, the longer the period, the worse.

Thus, it turns out that the liquid becomes unusable on its own during the use of the car. Therefore, it is necessary to periodically change the fluid in order for the brakes to work properly; a change is simply necessary. Sometimes a complete brake fluid change may be necessary.

In addition, you will have to change the fluid if the car's brake system has been faulty for some time and there was a leak. Or, during the process of moving to the nearest service station (again due to a brake failure), different solutions were mixed.

How much brake fluid is needed for a car and how often is it needed, what is its quantity? As a rule, the frequency of replacement is indicated in the vehicle’s technical passport. These recommendations must be followed and the brake fluid must be changed as often as written to ensure proper compliance with the period.

If for some reason the document is not available, then you can rely on the following recommendations:

change brake fluid every 2 years
change the composition to a new one every 40,000 kilometers
when the braking mechanisms were repaired
when the car has not been used for more than six months

Why is it better to entrust the matter to professionals?

Most modern cars are equipped with an ABS system, which was discussed above. At service stations, brake fluid is filled using special tools under pressure. This eliminates the entry of air and moisture.

“If you do everything yourself, it is much more difficult to avoid mixing with the environment. And the brake becomes less resistant to high temperatures.”

Petr Khorokovsky – chief expert of the auto portal

In addition, if the car is equipped with integral ABS, then changing the fluid manually will not be possible at all - you need a special tool called a proprietary scanner.

On cars without ABS and some models with ABS, you can change the brake fluid yourself, strictly following the procedure. So how do you change brake fluid yourself?

What do we need?

An inspection hole or any other convenient platform for fixing the car and convenient approaches to it.
New brake fluid (volume from 1 liter).

You can choose different types - dot 3 brake fluid, dot 4 fluid and dot 5 brake fluid differ in their composition, choose the one that suits your car.
Keys for 8 and 10.
Container for used composition.
A transparent hose that will hardly fit onto the air bleeder fitting.
Standard set of tools, rags, clean rags, gloves.
Partner.

The procedure for replacing brake fluid yourself

For a complete replacement, it is advisable to place the car on an overpass and remove all the wheels. If this cannot be done, then it is possible to change the fluid by removing the wheels one by one.

Be sure to find a diagram of the brake system in the owner's manual and determine which type is installed on your vehicle. There are only two types - diagonal and parallel. Depending on this, the work is carried out in different sequences.

Parallel option: right rear – left rear – left front – right front.

Diagonal option: right rear – left front – left rear – right front.

The order cannot be violated, since it depends on the distance of the circuits from the master cylinder of the brake system. So if you want to change the fluid in your car, remember the order and find out the diagram.

Here the procedure will be as follows:

Remove the tank lid along with the float and place them on a previously prepared rag.
Remove the protective rubber cap of the valve and put on the hose, lowering its other end into a special container for the used composition; prepare a large container if there is a lot of liquid.
Press the brake pedal about five or six times (this is done by an assistant) every two seconds.
Unscrew the air release valve and at the same time press the brake pedal to the floor.
Observe how the old brake fluid flows out and, when the used mixture has finished leaving, tighten the valve.
Pour new brake fluid into the tank, monitoring the level and min and max marks.
Repeat steps 3-5 until new, clean fluid flows through the transparent hose. Constantly adding new composition to the tank.
Repeat all steps for each of the four wheels of the car, in accordance with the brake system diagram.
After passing all the wheels, completely fill the brake fluid into the tank, as much as will fit up to the Max mark. And then we check again that all the caps and lids are in place.
Checking the operation of the brake pedal. If it walks too hard or soft, then air has entered the liquid, which needs to be removed. This procedure is called bleeding the brakes.

Don't forget to put the rubber caps back in place. Otherwise, the brakes cease to be airtight and begin to malfunction.

Here the task becomes much more complicated; in most cases, it is better to transfer a car with ABS to a service center for service.

Of course, you can change it yourself, but you will have to take into account several factors:

you will have to turn on the ignition for the abs pump to work
The abs pump should not run for more than two minutes
To change the fluid you will need to constantly monitor the level in the additional tank
Changing brake fluid without bleeding won't work

Source: http://cars-bazar.ru/avtokosmetika/kak-pomenyat-tormoznuyu-zhidkost