Replacing the rear brake pipes of a VAZ 2109

A question such as replacing brake hoses on a VAZ 2109 and 2110, at first glance, seems simple for a car enthusiast who has an idea of what a wrench and a screwdriver are. But there are still some nuances that you need to know about for high-quality technical performance. We will talk about them in this article.

Replacing the front brake hoses on a VAZ 2109 and 2110 does not require any additional equipment from the car owner. This can be done even without a hole, right in the yard or garage, on a homemade small overpass, or just on the asphalt in a convenient place. The rear ones will most likely require an inspection hole or a lift.

Why do you need to change?

Why is it necessary to periodically inspect the brake system, in particular the hoses? One of my friends on the highway, at a speed of 100 kilometers per hour, when pressing the pedal, suddenly “lost the brakes.” The pedal simply went to the floor, and the car continued to rush towards the accident. It’s good that he knew how to slow down the car by changing gears, so to speak, “with the engine.” Gradually slowing down, he stopped on the side of the road and, wiping sweat from his forehead, opened the hood.

As it turned out, the brake fluid was “gone”, and at the nearest service station they discovered a break in the rear right brake hose, and all the others had such a degree of wear that they could “shoot” at any moment.

Required tools and replacement

Using a jack, lift the front wheel and remove it. Don't forget that the wheel bolts can also become stuck. To make them easily unscrew, spray WD-40 from a can several times and wait about 10 minutes. If the bolts are unscrewed but the wheel cannot be removed, there is also a “folk” method. For these purposes, some drivers carry a piece of board and a small sledgehammer in the trunk. We place the board next to the wheel and hit it with a sledgehammer several times. The wheel should come off;
Hold the tip on the brake hose with a “15” wrench. At the same time, turn the fitting on the tube with a “ten”;
To prevent brake fluid from leaking, put on a protective cap. If the nut is stuck, use VD. We wait 10-15 minutes, unscrew;
Next, you need to remove the sensor wires from the rubber holders based on pad wear;
The hose coupling must be removed from the shock absorber strut holder;
Unscrew the “15” hose fitting from the cylinder. The copper seal ring also needs to be replaced. Usually seals are sold as a set;
Install the new hose, carefully tightening the nuts;
We repeat the procedure in a similar way on the other front wheel (since, we remind you, it is best to change the hoses at least in pairs);
After everything, we bleed the brake system, checking the presence of fluid in the reservoir (by level). If necessary, top up!

Possible malfunctions of the brake system

Malfunctions of the VAZ 2109 brake system can be of different nature and there are quite a lot of them. In this paragraph we will look at the most basic ones:

Brake pedal malfunction. In this case, it may not only not work, but also not work as it should. This means that when you press the pedal, the load increases. That is, the driver presses lightly, but the braking occurs too sharply. With such a breakdown, the car may brake irregularly;
Long braking distance. In this case, when you press the brake, braking itself does not occur or the braking distance of the car increases several times;
The wheels do not brake at the same time. This case is quite rare, but if it occurs, the braking distance of the vehicle increases several times and the car begins to wobble when braking.
As for the cost of repairing these faults, everything is ambiguous. After all, the price of the VAZ 2109 brake system may depend both on the region of residence of the car owner and on the service you use.

On average, a major overhaul costs about 10-15 thousand, taking into account the replacement/repair of all parts.

Despite its simplicity and relatively outdated design, the brake system of the VAZ 2109 has more advantages than disadvantages. It should be noted that the repair of the brake system is cheap, which allows people with even low incomes to service the car. On our website you can also watch a video about the brake system of the VAZ 2109.

Replacing the rear brake hose

We unscrew the fitting using two keys: 10 and 15;
Remove the hose from the eyelet securing the rear beam to the body;
We put a protective cap on the end of the tube;
Using two wrenches, disconnect the hose and tube. Remove the brake hose. When replacing it, do not forget about the seals;
We put everything back in reverse order. We perform the same procedure on the other rear wheel. We pump the hydraulic drive (brake).

Thus, you are convinced that replacing brake hoses on VAZ 2109 and 2110 is not such a difficult matter. And with your own hands, if you have certain skills, it’s quite possible!

Brake hoses have to be changed quite often; according to the “garage guys”, this consumable part often does not last even six months. But, if you use the car carefully, it will require replacement in a year, or even two.

To extend their service life, wipe them with special additives, for example, Roil Platinum™ and wrap them with textile tape. At the same time, you need to remember that from time to time you need to check the condition under the electrical tape.

The worst thing is when the hose breaks on the road. The first sign of a breakdown is that the pedal “goes to the floor.” At the same time, it is impossible to brake quickly. In this case, you need to plug the torn end, for example, with a bolt. When one of the circuits does not work, the ABS also stops working, and during sharp braking the car turns around. The following is step-by-step instructions for replacing them with new ones.

Main elements of the brake system

The brake system of the VAZ 2109 car includes many auxiliary parts, but the main design elements are:

GTZ. Master brake cylinder. The most important part of the system, which creates pressure in the pipes. This element is made of a piston moving along an ideal, flat surface. Rubber rings are used to seal connections between components.

Please note that these rings must be replaced during repairs, regardless of whether they are intact or not.

The brake fluid that is poured into the GTZ is quite aggressive. It contains many additives. But they are the ones who guarantee high-quality engine operation. The disadvantage of such a system is that the components of this liquid quickly evaporate. Therefore, it is better to change the brake fluid at least once a year;
Vacuum booster. It is located between the passenger compartment and the compartment where the engine is located. It is a large container, cylindrical in shape. The booster is connected to the master cylinder and the booster runs a hose to the fuel injection system (carburetor).
The function of this element is to make driving easier. And this simplification lies in reducing the effort required to press the brake pedal.

On a note. If you think that this element of the brake system is not particularly important, then drive an old-style Zhiguli, which does not have a vacuum booster. The difference is simply huge, both in ease of control and in braking efficiency;

Brake calipers. The function of these calipers is to press the brake pad against the top of the disc. When repairing a VAZ 2109 model car, calipers are replaced in very rare cases for the reason that their service life is very long. The design consists of a housing made of aluminum, in which there are two holes. A tube is connected to one of the holes using a hose. A fitting is inserted into the other. Inside the device itself there is a piston made of steel that activates the pads;
Pressure regulator. An element whose purpose is to increase the efficiency of the braking system. The entire braking process is 70-80 percent done by the wheels of the front axle. The remaining percentage of braking is performed by the rear brake system of the VAZ 2109. Of course, this parameter is conditional and depends on many factors such as the load on the car, etc. Therefore, the developers made sure that the brake system of the VAZ 2109 model could, independently of anyone, regulate the forces on the wheel calipers of the front and rear axles.

How to change the brake hose on a VAZ 2109-2115?

1. The first thing to do is disconnect the negative (-) cable from the battery terminal.

2. Next, you need to remove the wheel whose brake hose needs to be replaced.

3. Then remove the wire connecting the block and the wear sensor.

4. With a sharp movement, push the tip of the wire out of the block on the other side.

6. Holding the tip of the tube with a “10” wrench, unscrew the hose from the brake pipe. At the same time, use the “15” key to hold the tip. If the nuts have “soured” in the tube mount, it should be cut in half and the tip removed from the tube.

7. Remove the tip and seal from the bracket on the rack and body. Using a 15mm wrench, unscrew the tip from the wheel cylinder... remove the hose.

8. Now we replace the broken spring clip.

9. Remove the seal from the bracket on the rack.

10. Unscrew the tip of the brake hose of the VAZ car from the wheel cylinder.

11. Please note that there is a copper O-ring on the tip. When installing a new brake hose, it must be replaced.

12. We install the new brake hose in the reverse order. Make sure it doesn't twist. The colored stripe on the hose control will help you avoid kinks.

13. The rear brake pipes should be replaced in the same way. After replacing the hoses, it is recommended to bleed the brake system to make sure everything is correct.

Work procedure

Rear brake pipes VAZ 2109

Before you take action, you need to prepare first. During the preparatory work, it is necessary to clean the surface of the fitting tubes from contamination. You also need to apply a special compound to all threaded connections, this will make it much easier to unscrew the nuts. In addition, you need to prepare a wrench, spare brake fluid for topping up, a small container to drain the remaining fluid from the system and a suitable vinyl tube. For convenient repairs, it is recommended to install the machine either on an overpass or on a pit for inspection:

First, use a Phillips screwdriver to unscrew two self-tapping screws that secure the tube to the body of the vase.
Using a suitable wrench, unscrew the 2 fittings through which the tubes are attached to the hose with the regulator.
The tube is removed.
After all necessary work has been carried out, the tubes are installed in the opposite order to dismantling.
Add brake fluid.
The quality of repaired brakes is checked.

On newer VAZ models, the tubes are first unscrewed from the main cylinder and brake hose, only after that the holes are plugged. In this case, you will have to unscrew the 3 fastening nuts and remove the plastic covering. Next, dismantle the metal plates and disconnect the necessary tubes from the clamps; if they are damaged, they will need to be replaced.

Note! New elements must be secured in the opposite order. To check the quality of work, it is necessary to bleed the system. It must be done to eliminate excess air.

Replace the rear brake pipe of a VAZ 2109

Signs of air penetration into the system are considered to be increased travel and softened sagging of the brake pedal when pressed. It is necessary to follow a certain sequence of bleeding the brakes:

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

In addition to changing the brake line, the brake hose may also need to be replaced.

How to repair brake pipes

This process requires the car enthusiast to have extensive locksmith skills and the ability to use special tools. Repairs are carried out in cases where it is not possible to replace the damaged line; it involves saving money on the purchase of a new pipe system and extends the service life of the old one.

To carry out repairs you must:

1. Unscrew the damaged tube from the cylinder or brake caliper.

2. After disconnecting, it is necessary to cut off the damaged area using a pipe cutter.

3. Clamp the tube 50 millimeters from the edge of the cut and chamfer the edge of the tube using a drill.

4. Remove all that remains of the chips and insert a fitting intended for connecting the tube to the brake operating mechanism into the cut area.

5. Insert the end of the tube into the special equipment and flare it. The main line that has undergone repairs must be purged with compressed air. And only after this is it installed with a working mechanism or another pipeline system using an adapter.

As for the length of the tube, this parameter depends on the car model. On some cars, the brake pipes have a reserve that allows you to shorten the pipe and reconnect it to the working mechanism. The metal from which the brake tube is made is flexible, so there should not be any difficulties with its position.