Brake system VAZ-2109. The device of brake system VAZ-2109

Brake system VAZ-2109 is a two-circuit, hydraulic drive. The pressure in it is large enough, therefore it is necessary to use hoses with reliable reinforcement and metal tubes. Of course, their condition must be maintained at the proper level, so that there is no leakage of liquid. But the advantage of the system used on the car is that if one of the hoses is broken, the braking will still be carried out by two wheels. Therefore, the emergency situation will be avoided. In extreme cases, you can use the parking brake.

Master Brake Cylinder

GTZ is the most important, since it is with its help that the necessary pressure is created in the tubes. It consists of a piston that moves in the cavity of the cylinder, along a perfectly flat surface. Rubber rings are used as seals, which must be replaced when carrying out repairs. The brake system of the VAZ-2109 car has high efficiency, in many respects it is provided due to the use of reliable elements.

Particular attention should be given to the brake fluid when operating the vehicle. It's no secret that it is too aggressive, contains a lot of additives that ensure stable operation. Note that compression causes an increase in the temperature of the liquid, hence its viscosity changes. The use of additives allows you to get rid of this effect. One minus - additional components with time evaporate. Experienced masters recommend replacing fluid in the system at least once every two years.

Vacuum amplifier

If you know the VAZ-2109 braking system, you saw that there is a large, cylindrical shape on the firewall (between the cabin and the engine compartment), with which the GTZ is connected. Also from this capacity is the hose to the carburetor (if such a fuel injection system is used on the car). This is the vacuum brake booster.

It serves to facilitate driving. With its help, the force applied to the pedal is reduced several times, in order to stop the machine. Comfort and safety are assured to you. To appreciate all the advantages of using this device, try driving on an old "Zhiguli", which does not have a vacuum amplifier. The difference is simply enormous - all movements of the pads give blows to the pedal, and the braking efficiency is extremely low.

Brake calipers

On the front axle calipers are mounted, which firmly press the pads against the surface of the disc. When the repair of the VAZ-2109 braking system is being carried out, it is extremely rare to replace the calipers, since they have a large resource. This device, consisting of an aluminum housing, in which there is a hole for connection to the tube with a hose. Nearby there is an opening, into which the nipple used for pumping the system is screwed. Inside there is a steel piston. It is he who drives the pads.

Fastening of a forward support is made to a nave of a wheel by means of two bolts. When carrying out work, do not press the brake pedal if the front shoes are removed. This will cause the piston to protrude from the body. Collect after that it will not work. The rear braking system VAZ-2109 is a bit simpler. It uses a support, but it is made in the form of a cylinder, on both sides of which there are pistons. With their help there is a dilution of the pads in the sides.

Pressure regulator

This element allows you to make the braking system more efficient. It's no secret that the whole process of braking is performed on 75% of the front wheels. And the rest - back. But this is an approximate value, it depends on many parameters. For example, the degree of loading the car affects it, as well as the intensity of braking. Therefore, for effective operation it is necessary that the VAZ-2109 brake system independently conducts the force adjustment on the calipers of the front and rear wheels.

With this simple mechanism, the pressure in the tube, along which liquid is fed to the rear axle of the car, is reduced. Fastening it is made to a back beam by means of an arm. When carrying out repairs, the threaded joints must be pre-treated with penetrating grease. To unscrew the ends of the tubes, you will need to use a special key. It can be purchased in auto shops, it is crimp type. Unlike carobs or wiggles, does not licks faces.

Handbrake Cable

You can even say that this is a secondary element of the whole system, since, unfortunately, not all motorists use the parking brake. Therefore, do not follow the status of this node, without which the brake circuit VAZ-2109 would seem incomplete. The reason for this is the habit of installing the car for speed. And in the winter, such a habit proves useful, because it can happen that the pads get to the drum. At the beginning of the movement, the whole mechanism in the rear drums can simply fall apart.

But often the parking brake is necessary. Not everyone can correctly adjust it. It is desirable to carry out the work on a pit or a lift, so it is more convenient. Firstly, with two clicks, raise the parking brake lever. Then, using the keys and penetrating grease, loosen the lock nut. Second, with the adjusting nut, draw the cable tension. Lower the lever and check if the drums touch the pads. If not, the setting is correct.

Replacement of tubes and hose

In carrying out this work, you will need to use a special crimp key at 8, which was mentioned above. Also, you need to buy copper pads in the store. Old use is prohibited, as they are deformed and will not be able to provide tightness. In total, the VAZ-2109 braking system has three flexible tubes - for connecting the front calipers and for connecting the amplifier to the rear wheel contour.

When replacing the hose, it must be drained completely. To do this, unscrew the fittings on each of the calipers. At the junction of the flexible and rigid tubes is installed a metal bracket, which fastens them to the bracket on the body. Also, the hoses are attached to the shock absorber by means of a rubber seal . At the junction of the hose with the metal tube and the support, it is necessary to install copper washers for compaction.

Brake fluid replacement

A liquid is replaced in the system as planned, as mentioned above, every two years. But if the VAZ-2109 braking system is being repaired, new pipes or hoses are installed, then it is necessary to top up the liquid and carry out pumping. To do this, collect all the elements, pour liquid into the expansion tank. Bleeding is carried out from the farthest wheel - the rear right. And advance as you approach the front left, which is closest to the brake cylinder. In order not to get confused for the first time, the brake system of the VAZ-2109 will help you.

It will come in handy for you a small container in which you pour in the brake fluid. You also need to use a small piece of transparent hose. If there is no suitable, then for the time of repair, borrow from the windscreen cleaning system. With its help, control the air leaving the system through the bubbles. Assistant sit in the driver's seat, he must squeeze the pedal and keep it in the extreme position. At this time, you unscrew the choke and release air. However, with any malfunction of the VAZ-2109 braking system, the pumping must be carried out - this will ensure the efficiency of the operation.

Replacement shoe

However, this is the simplest thing that can expect you while servicing. Unfortunately, VAZ-2109 does not provide wear control for the brake pads, so it should be done visually. To carry out the replacement, you need to remove the wheel, after raising the repair side. After that, unscrew one bolt of fastening of a support and shift a forward part of it, releasing access to колодкам which simply remove. The brake system of the VAZ-2109 is such that it is not necessary to remove the complete caliper. Install the new pads immediately does not work. First, you need to push the caliper piston with the help of the mount to increase the gap from it to the surface of the disk.