Air in the brake system is a potential safety hazard. It can form there from the vapors of boiling aged brake fluid(due to large amounts of condensation), leaks, damage to parts brake system or during the process of replacing hydraulic components. Therefore, before you start pumping the brakes, you need to check whether the system is sealed - the joints of the elements.

In addition, you need to remember how long ago the brake fluid was filled. It must be changed every two years and must not be mixed under any circumstances. different types liquids. For example, if a DOT-3 type “brake fluid” is filled, then you should not use DOT-4 or DOT-5 - this can lead to “dissolution” of the seals in the brake cylinders and joints of system components.

Bleeding the brakes seems like a difficult task only at first glance. However, she is very responsible. The correctness of your actions determines whether the brakes will let you down at the most inopportune moment. If you are not confident in your skills, then it is better to seek help from the service and spend your free time meeting with friends.

If you still decide, then stick to the basic rules, and then no problems should arise. Firstly, when bleeding air, there should always be brake fluid in the reservoir. Secondly, strict adherence to the correct sequence of actions is necessary.

Attention! In a car without ABS bleeding you need to start with the wheel furthest from the brake pump - usually the rear right one. Then we move to rear left, front right and end with front left. In cars with ABS, the procedure begins with the front wheels.

Third, we have to be careful with the bleed valves. If they are very rusty or dirty, then before unscrewing them, clean them with a wire brush and treat them with a spray like “ liquid key"(WD-40). This will make it easier to unscrew the valve. After opening the valve, the brake fluid should drain until we see no bubbles and the fluid becomes clean and clear.

And one moment. To properly bleed the brake system, two people are needed. Ask a friend for help. Together, doing this is more efficient, faster and, of course, more fun.

Bleeding the brake system withoutABS

Pumping scheme:

1. Brake cylinder or caliper of the rear right wheel.

2. Brake cylinder or caliper of the rear left wheel.

3. Front right wheel caliper.

4. Front left wheel caliper.

Attention! On vehicles with distribution braking forces along the axes (colloquially “sorcerer”) during pumping rear brakes it is necessary to move the lever (piston) of the sorcerer to simulate full load cars. This will ensure maximum throughput brake line and will make bleeding the brakes easier.

Sequencing:

1. Remove the cap from exhaust valve wheel brake cylinder ventilation, clean the valve and put on a clean transparent hose. Insert the other end of the hose into a container half filled with brake fluid.

2. Ask your assistant to press the brake pedal until pressure is built up in the system. A sign will be increasing resistance to the brake pedal.

3. To create pressure, you must fully press and hold the brake pedal.

4. Loosen the air release valve half a turn. Liquid will flow into the container. The other end of the hose must be immersed in liquid.

5. After a noticeable drop in system pressure, tighten the vent valve.

6. Repeat the bleeding operation with the brake pedal depressed.

7. Repeat pumping again until there are no air bubbles in the liquid in the hose.

8. Remove the hose from the outlet valve and replace the protective cap.

9. Repeat the same steps for the brake cylinders of the remaining wheels.

Bleeding the brake system withABS

In vehicles equipped with ABS, the process is slightly different. If the fluid level in the reservoir drops too much during bleeding, air may enter the brake system, which will then end up in the pump. In this case, you will not be able to continue pumping the system and will have to contact service.

Front wheels:

2. Fill the brake system reservoir to the very brim.

3. Place a transparent hose onto the right air bleeder valve. front wheel. Place the other end of the hose into a container of brake fluid.

4. Have an assistant press the brake pedal until pressure appears in the system. Then, while holding the brake pedal depressed, unscrew the valve. When the pedal resistance stops, close the valve.

5. Repeat this procedure several times until the liquid in the hose is free of bubbles.

6. Close the valve and fill the reservoir with brake fluid.

7. Pump the second “wheel” in exactly the same way.

Rear wheels:

1. Turn off the ignition and apply the brake approximately 20 times to release the ABS control pressure.

2. Press and release the brake pedal.

3. Turn on the ignition, put on the hose and open the air bleed valve of the right brake cylinder. Close the valve as soon as there are no more air bubbles in the hose.

Attention! Pump ABS systems should not run for more than two minutes, otherwise it will overheat. Thus, after every two minutes it is necessary to take a ten-minute break to cool the pump.

4. Turn off the ignition and prepare the left wheel brake valve.

5. Bleed the second “wheel” in exactly the same way.

6. Turn on the ignition and wait until the ABS pump turns off on its own.

7. Top up brake reservoir liquid to maximum.

Bleeding the hydraulic brake system

Brake fluid is poisonous. Wash any parts of your body that come into contact with copious amounts of cold running water and seek immediate medical attention. medical care if liquid gets into the mouth or eyes. Some types of brake fluid are flammable and may ignite if they come into contact with hot components. Take appropriate fire safety measures.

Brake fluid is aggressive to paint and plastics - if it gets on such surfaces, immediately wash off the fluid with copious amounts of water.

In addition, the liquid is hygroscopic (absorbs moisture from the air) - old liquid may be contaminated with water and unsuitable for use. When adding or changing fluid to the system, use the recommended type of fluid from a freshly opened sealed container.

MODELS NOT EQUIPPED WITH ABS
general description
Correct functioning of the hydraulic brake system is only possible if its components are free of air. To remove air from the system, bleed it.
During the bleeding procedure, add only clean, fresh brake fluid of the type specified in the Specifications. Never reuse the liquid.
Park the car on level ground (not downhill), turn off the ignition and select 1st gear or reverse. Block the wheels and release the handbrake.
Make sure that all tubes and hoses are securely attached, the couplings are tight, and the bleeder fittings are closed. Remove the dust caps and clean any dirt from the bleeder fittings.
Unscrew the brake hydraulic system reservoir cap and bring the fluid level to the “MAX” line. Replace the cap and be sure to maintain the fluid level above the “MIN” line throughout the procedure, otherwise air will re-enter the system.
Available for sale whole line devices for bleeding the brake system by one person. It is recommended to use one of these kits as they make the job much easier and also reduce the risk of escaping air and fluid being sucked back into the system. If such a device is not available, use the basic pumping method (for two people), detailed below.
If a tool is used, prepare the vehicle as described above and follow the kit manufacturer's instructions. The procedure can vary significantly depending on the type of device used, its basic procedure is also described below.
Whatever method is used, follow the correct bleeding sequence.

Leveling sequence

If components of only one of the circuits have been disconnected or removed (for example, a caliper or brake wheel cylinder), only that circuit needs bleeding.
If the entire system needs to be bled, proceed in the following sequence:
a) Rear right brake mechanism.
b) Front left brake mechanism.
c) Rear left brake mechanism.
d) Front right brake mechanism.

Leveling - basic method (for two people)

EXECUTION ORDER

1. Prepare a clean glass reservoir and a suitable length of plastic or rubber tube that fits tightly onto the bleeder fitting. Help from a second person will be required. 2. If not already done, remove the dust cap of the bleeder fitting and place the tube prepared for bleeding onto the fitting. Immerse the other end of the tube in the brake fluid previously poured into the reservoir. 3. Make sure the master cylinder reservoir is full and maintain the fluid level above the “MIN” line throughout the procedure. 4. Ask your assistant to press brake pedal 6. Repeat this procedure (paragraphs 4 and 5) until the leaking brake fluid is free of air bubbles. If, when bleeding the first brake mechanism, all the fluid has drained from the master cylinder, fill master cylinder and bleed the brake again, taking breaks of approximately five seconds between cycles. 7. Tighten the bleeder fitting, remove the plastic tube and install the dust cap. 8. Repeat the procedure for the rest brake mechanisms x in the above sequence.

Bleeding using a device with a non-return valve

Pressure pumping

EXECUTION ORDER

1. These devices are activated compressed air contained in the spare wheel chamber. However, please note that the air pressure must be reduced (see instructions included with the tool). 2. Attach the supplied brake fluid-filled container to the master cylinder reservoir and to the spare tire. Perform bleeding by opening the fittings one by one (in the specified sequence) and draining the liquid until it is free of air bubbles. 3. This method has advantages because A large amount of fluid in the installed reservoir prevents air from entering the master cylinder during bleeding. 4. Bleeding under pressure is especially effective when bleeding “problematic” systems ( airlock stuck in a place from where it is difficult to remove it) or when completely bleeding the system during the next fluid change.

All methods

EXECUTION ORDER

1. Upon completion of bleeding, wash off the spilled liquid, tighten the bleeding fittings to the torque given in the Specifications and install their dust caps. 2. Check the brake fluid level in the master cylinder reservoir and bring it up to normal, if necessary (refer to Section). 3. Pour out the brake fluid released during bleeding; it is not suitable for reuse. 4. Check the elasticity of the brake pedal. If dips are felt when it moves, there is still air in the system and further bleeding is required.

If repeated bleeding does not bring satisfactory results, the master cylinder seals may be worn out.

MODELS EQUIPPED WITH ABS
Information regarding the conventional brake system (except for pressure bleeding) applies to models equipped with ABS. However, on these models a different pumping sequence is used:
a) Left front brake mechanism
b) Right rear brake mechanism
c) Right front brake mechanism
d) Left rear brake
In addition to this, the following bleeding procedures are used.

Bleeding after disconnecting the wheel cylinder/caliper coupling

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EXECUTION ORDER

1. Connect the container to the bleeder fitting and bring the fluid level in the master cylinder reservoir to normal. Remember to keep it above the “MIN” mark throughout the procedure. 2. Open the bleeder valve, then ask an assistant to press the brake pedal all the way and hold it in this position. Tighten the fitting and have an assistant slowly release the pedal and wait approximately 3 seconds. Repeat this procedure at least ten times until the fluid flowing from the bleeder fitting is free of air bubbles. 3. Again ask the assistant to press the brake pedal several times and keep it pressed. Open the bleeder valve and let the pedal go to the floor. Tighten the fitting and have an assistant slowly release the pedal and wait at least 3 seconds. Repeat this procedure and make sure that the fluid that comes out is free of bubbles. 4. Check the elasticity of the brake pedal, then remove the container and bring the fluid level to normal (refer to Section Routine maintenance schedule).

Make sure the bleeder fitting is tightened to the specified torque, then install the dust cap.

EXECUTION ORDER

Bleeding the disconnection field of pressure-regulating couplings 1. Bleed both rear brakes as described above. Bleeding after disconnecting the master cylinder coupling 2. If the master cylinder has been disconnected, it must be bled before connecting to the hydraulic line to prevent air from entering the hydraulic block. To do this, you will need two plugs that are screwed into the holes in the master cylinder. 4. Fill the cylinder reservoir, then open the rear plug/fitting (first circuit) and have an assistant press and hold the brake pedal. Tighten the plug, then have an assistant slowly release the brake pedal and wait about 3 seconds. Repeat this procedure 5-6 times. 5. Repeat the procedure for the front of the master cylinder (second circuit). 6. To prevent fluid from escaping from the cylinder, and therefore air from entering it, before removing the plugs, ask an assistant to lightly press the brake pedal (approximately 30 mm) and hold it in this position. 7. Remove the plugs from the brake pipes and make sure that both pipes are filled with fluid; if not, add liquid to them. Quickly remove one of the master cylinder plugs (the brake pedal is held as described in the previous paragraph), connect the brake pipe and tighten the connecting nut to the torque specified in the Specifications.

Repeat the procedure on the second master cylinder port, then wash off the spilled fluid.

8. Refer to the paragraphs above and completely bleed the brake hydraulic system in the above sequence.

Bleeding after disconnecting the hydraulic unit coupling 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.

Modern driver

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

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.

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 device
Here are 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 in which the following units are located in one unit: a hydraulic valve block, a hydraulic accumulator and a pump, replacing the brake fluid and bleeding the brake system with anti-lock braking system It is done in the same way, 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 systems activation (ESP or SBC) is carried out only in the terms of service.

How to bleed ABS brakes

It is important! It should be remembered that the pressure in the brake system reaches 180 atm. Therefore, to prevent brake fluid from escaping, before disconnecting brake lines For 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.

The Toyota Corolla car, despite its well-deserved trust and authority among car owners, requires careful and careful treatment. One of the main systems with which difficulties may arise during operation is the brakes.

The Toyota Corolla car, despite its well-deserved trust and authority among car owners, requires careful and careful treatment. One of the main systems with which difficulties may arise during operation is the brakes. They need to be pumped, but not all owners of this brand of car can do this technically competently.

Both new members of the auto community and experienced drivers Simple and timely reminders are always useful that:

• all manipulations with brake fluid must be done very carefully;
• avoid contact with human skin, especially take care of the eyes;
• do not allow contact with paintwork car;
• protect brake fluid from contact with hot elements and fire - it is flammable;
• it is strictly forbidden to reuse the liquid;
• only incompressible fluid will provide uninterrupted operation brakes, so do not allow it to become dirty or clogged.

It will be impossible for one person to troubleshoot problems, because bleeding Toyota Corolla brakes requires a “game of 4 hands”, with their 4-fold repetition (of course, according to the number of wheels).

Algorithm of all necessary actions:

1. Bleeding begins with the longest brake system.
2. Place the car on a level plateau. Turn off the engine and place the gear lever in the reverse or 1st gear position. Lock the wheels, lower the handbrake.
3. Pre-fill working mixture, similar to SAEJ 1703, VSS116DOT3.
4. Remove the master cylinder, be sure to pump out the air from there (if it is empty or the fluid level has reached a minimum).
5. Put away brake pipes from the cylinder.
6. Press the brake and hold it smoothly, without jerking.
7. Pinch the cylinder outlets with your fingers and release the brake.
8. Learn this repair procedure and repeat it 3-4 times.
9. Connect the tube to the brake caliper.
10. Press and release the brake several times, loosen the bleeder screw and bleed the air. Lower the pedal.
11. Repeat the process until the liquid stops flowing out (simultaneously with the appearance of air bubbles in it).

Manufacturing companies gave people (instead of improving the art of driving) the opportunity to enjoy a comfortable and pleasant pastime. This happens thanks to sensors, valves and electronic unit control to change the pressure in the brake system. This “smart” ABS system has brake bleeding features:

1. You need to look at the previous paragraph, point No. 3.
2. Place the end of the tube on the rear stupor valve, and lower the other part into a clean container with liquid.
3. Turn the ignition key to the second position, press and hold the brake. The pump will turn on on its own, increasing the pressure in the rear brake circuit.
4. Loosen the valve so that the liquid begins to come out. It is important not to release the brakes at the same time!
5. When the air bubbles disappear, tighten the valve, lower the brake, and turn off the ignition.
6. Top up the brake fluid level to the very top.

• first the front wheels are pumped (you need to follow the “brake” regulations);
• the pump with hydraulics is turned on at one time for no more than 2 minutes;
• After 2 minutes of operation, be sure to turn off the ignition and cool the pump for at least 10 minutes.