Replacing the master brake cylinder of a VAZ-2108 in pictures

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Brake system VAZ 2110

Vacuum unit structure of the VAZ 2110: 1 – vacuum amplifier housing; 2 – amplifier housing cup; 3 – rod; 4 – adjusting bolt; 5 – rod seal; 6 – sealing ring of the master cylinder flange; 7 – diaphragm return spring; 8 – amplifier stud; 9 – tip mounting flange; 10 – valve; 11 – hose tip; 12 – diaphragm; 13 – amplifier housing cover; 14 – sealing cover; 15 – piston; 16 – protective cover of the valve body; 17 – air filter; 18 – pusher; 19 – pusher return spring; 20 – valve spring; 21 – valve; 22 – valve body bushing; 23 – rod buffer; 24 – valve body; A – vacuum chamber; B – atmospheric chamber; C, D – channels.

Brake pressure regulator drive VAZ 2110

Drive device for the VAZ 2110 brake regulator: 1 – pressure regulator; 2, 16 – pressure regulator mounting bolts; 3 – pressure regulator drive lever bracket; 4 – pin; 5 – pressure regulator drive lever; 6 – axis of the pressure regulator drive lever; 7 – lever spring; 8 – body bracket; 9 – mounting bracket for the pressure regulator; 10 – elastic lever for the pressure regulator drive; 11 – earring; 12 – earring bracket; 13 – washer; 14 – retaining ring; 15 – bracket pin; A, B, C – holes.

Pressure regulator VAZ 2110

Diagram of the brake pressure regulator VAZ 2110: 1 – pressure regulator housing; 2 – piston; 3 – protective cap; 4, 8 – retaining rings; 5 – piston sleeve; 6 – piston spring; 7 – body bushing; 9, 22 – support washers; 10 – sealing rings of the pusher; 11 – support plate; 12 – pusher bushing spring; 13 – valve seat sealing ring; 14 – valve seat; 15 – sealing gasket; 16 – plug; 17 – valve spring; 18 – valve; 19 – pusher bushing; 20 – pusher; 21 – piston head seal; 23 – piston rod seal; 24 – plug; A, D – chambers connected to the main cylinder; B, C – chambers connected to the wheel cylinders of the rear brakes; K, M, N – gaps.

Main brake cylinder VAZ 2110

The structure of the main brake cylinder of the VAZ 2110: 1 – main cylinder body; 2 – low pressure sealing ring; 3 – drive piston of the “left front–right rear brake” circuit; 4 – spacer ring; 5 – high pressure sealing ring; 6 – pressure spring of the sealing ring; 7 – spring plate; 8 – piston return spring; 9 – washer; 10 – locking screw; 11 – drive piston of the “right front–left rear brake” circuit; 12 – connecting sleeve; 13 – tank; 14 – brake fluid emergency level sensor; A – gap.

Brake mechanism of the front wheel of a VAZ 2110

The design of the front brake mechanism of the VAZ 2110: 1 – brake disc; 2 – pad guide; 3 – caliper; 4 – brake pads; 5 – cylinder; 6 – piston; 7 – pad wear indicator; 8 – sealing ring; 9 – protective cover of the guide pin; 10 – guide pin; 11 – protective casing.

Brake mechanism of VAZ 2110 rear wheel

Diagram of the rear brakes of the VAZ 2110: 1 – hub fastening nut; 2 – wheel hub; 3 – lower tension spring of the pads; 4 – brake pad; 5 – guide spring; 6 – wheel cylinder; 7 – upper tension spring; 8 – expansion bar; 9 – finger of the parking brake drive lever; 10 – parking brake drive lever; 11 – brake mechanism shield.

VAZ 2110 rear brake wheel cylinder device

Diagram of the rear brake cylinder of the VAZ 2110: 1 – pad stop; 2 – protective cap; 3 – cylinder body; 4 – piston; 5 – seal; 6 – support plate; 7 – spring; 8 – crackers; 9 – thrust ring; 10 – thrust screw; 11 – fitting; A – slot on the thrust ring.

Handbrake drive VAZ 2110

Handbrake device VAZ 2110: 1 – lever fixation button; 2 – parking brake drive lever; 3 – protective cover; 4 – traction; 5 – cable equalizer; 6 – adjusting nut; 7 – lock nut; 8 – cable; 9 – cable sheath.

Brake fluid level sensor VAZ 2110

Design of the brake fluid reservoir cap of the VAZ 2110 with a level sensor: 1 – protective cap; 2 – sensor housing; 3 – sensor base; 4 – sealing ring; 5 – clamping ring; 6 – reflector; 7 – pusher; 8 – bushing; 9 – float; 10 – fixed contacts; 11 – moving contact.

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Also check out

Dismantling the cylinder head on a VAZ 2109. Algorithm for replacing the cylinder head gasket yourself
How to independently modify the VAZ 2107 stove by installing a VAZ 2108 “snail”
How to replace the Lada Kalina fuel filter with your own hands. Installing a new fuel pump mesh

Unscrew the two nuts securing the main brake cylinder with a vacuum booster on the VAZ 2108. Remove the cylinder from the studs.

How to remove the main brake cylinder of a VAZ 2108 with your own hands

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Required Tools

If you plan to do the repair yourself, then you need to check the availability of the following tools and materials:

Screwdriver Set.
Brake fluid.
Special wrench for disassembling brakes “10”.
Socket wrench “17”.
Plug fittings.
Pliers.
Rubber caps.
A set of keys.
Socket wrench "13".

Advice! If in the VAZ 2110 mechanism, in addition to the sealing rings, other parts are damaged, then only replacing the GTZ will help. If the remaining elements are fully operational, you need to buy new rings and install them in place of the damaged parts.

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How to install the master brake cylinder on a VAZ 2108 with your own hands?

1. Place the GTZ in place, then pour TJ into the tank.

2. Take the tubes and place them in such a way that they correspond to their place according to the markings you made during disassembly.

3. Use your fingers to close the holes for the pipes on the GTZ and ask someone to slowly press the brake pedal.

4. When you press the pedal, brake fluid will flow out of the first injectors of the master cylinder; it is at this moment that you need to tighten the brake pipes. The assistant does not release the brake pedal.

Now we can say that everything is ready. All that remains is to assemble everything and check the performance of the brakes.

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Master brake cylinder

Now let's talk about the master brake cylinder on a VAZ 2110 car. If you do not want to allow the brakes to fail while driving, they should be checked periodically, and if problems arise, take appropriate action immediately.

A common reason for replacing the master brake cylinder of a VAZ 2110 is precisely the fact that the brakes are lost.

Symptoms of a problem

Of course, brakes can completely lose their effectiveness for various reasons, but now we are talking specifically about the master cylinder. If the reason lies therein, then it can be determined by the following signs:

The master cylinder shows signs of brake fluid leakage;
The pedal has an idle motion, that is, when it is pressed, no force is created;
The brake pedal simply won't press.

Replacement

To repair the master brake cylinder of a VAZ 2110, you will need to first disassemble it and then install a new element.

The most difficult process is disassembly. Therefore, let's talk about it in more detail.

Carefully disconnect the master cylinder from the pipeline.
Disconnect the block, which is equipped with wiring, from the emergency brake fluid indicator. The connection to the “ten” is made by terminals.
Cover the pipe and assembly openings with something to prevent brake fluid from leaking. It will pollute the interior space, which is undesirable.
Now remove the cylinder along with the reservoir. To do this, simply unscrew the fastening nuts that connect the element to the vacuum booster.
After removing the brake fluid level sensor, drain the brake fluid present from the cylinder and the cylinder itself.
If there is no serious need, you should not remove the tank. But for complete assembly, the tank is removed and then installed in place in strict order.
Before reassembly, each element is washed with purified brake fluid. A good alternative is isopropyl alcohol.
Do not forget to dry the parts with a compressor and wipe with a clean, dry cloth.
Carefully avoid contact of the main cylinder with fuel or kerosene.
Pay special attention to the O-rings. If you wash them with special alcohol, do not keep the rings in this liquid for more than 20 seconds. After processing, immediately dry and wipe the seals.
Treat the surface of the piston and mirror to remove all rust.
When replacing the master cylinder, new O-rings must be installed, regardless of their current condition.
Check the elasticity of the piston springs under load. Refer to the VAZ 2110 repair manual, which indicates the appropriate loads and forces for testing.
When free, the length of the spring should be 59.8 millimeters. If the indicator deviates from the norm, be sure to replace the springs.

Leveling up

If you think that after replacing the brake master cylinder you can safely go out on the roads, then you are mistaken. In fact, a complete repair of brake cylinders on a VAZ 2110 includes bleeding.

Proper bleeding will ensure the efficiency of the newly installed master cylinder.

The procedure is not complicated, but requires following the instructions:

Find someone who will help you in this matter. One will be near the car, and the second will be directly in the cabin.
Inflate the brake pedal by pressing it several times.
The assistant presses the pedal, and meanwhile you slightly unscrew the fitting on one of the brake system pipes.
This should release air, as well as a small amount of brake fluid. Don't be alarmed by leaks, this is completely normal.
Retighten the fitting using the same wrench as when unscrewing - 10.
Command your assistant to lower the part.
The procedure is repeated until air bubbles begin to come out when unscrewing the fitting.
Each of the four circuits is pumped using similar actions.
First make sure that the brake fluid in the expansion tank is filled to the required level.

Actually, at this point the repair work related to the master brake cylinder can be considered complete. Experience in operating a car like the VAZ 2110 suggests that you should always store a container of brake fluid in the trunk. All sorts of situations happen on the road, and you need to be prepared for them.

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How to disassemble the GTZ VAZ 2108?

Once the brake master cylinder is removed, disassembly can begin. Provided that you are not going to completely change the GTZ, but only want to change worn out elements (rubber seals, cuffs and brake pistons). Check the condition of the parts and, if necessary, replace faulty parts. The pistons are removed simply by hand or by supplying compressed air to the nozzle of the second chamber; the openings of the tank must be closed. Before assembly, make sure there are no burrs or scratches on the surfaces of the cylinders; if there are any, you will have to completely replace the VAZ 2108 GTZ.

If repairing the VAZ 2108 GTZ is impractical and you are going to completely change the master brake cylinder, then put the brake reservoir on it and put everything in place. Further details on how to install a new GTZ on a VAZ 2108.

Nuances of repair

O-rings require special attention. The time the rings are in isopropyl alcohol should not exceed twenty seconds, after which they should be dried immediately using a compressor.

The surfaces of the mirror, as well as the piston elements, must be completely clean and free of rust. Every disassembly and repair of a faulty brake master cylinder must be accompanied by replacement of the O-rings, even if they are in good condition. The cuffs of the device also require attention; if they are swollen and frayed, they must be replaced.

After all, it is necessary to check the elasticity of the piston springs; this should be done under load. The length of the spring under load should be 39.01–45.9 N (3.8–4.8 kgf) - 41 mm, with another option the following indicators should be 82.01–99.48 N (8.35–10 .15 kgf) – 21 mm. When free, the spring should have a length of 59.8 mm. If the springs do not have such indicators, then they must be replaced.

Brake system VAZ 2110 - diagram

For better or worse, all Tolyatti models suffer from the same diseases. The perestroika virus brought them to the plant back in the 80s, along with the VAZ 2108, and since the genetics of the cars did not change, the diseases were the same. The VAZ 2110 is no exception. A nice replacement for the eights and nines appeared on the assembly line about 20 years ago, almost completely repeating the design of the front-wheel drive VAZ first-borns. The same applies to the brake system of the tenth family, which we will wash the bones with today.

Content:

Vacuum booster

The braking system of a car certainly cannot be called perfect, so it has to be supplemented with devices that help improve efficiency. One of them is a vacuum booster.

Application and purpose

Today, a vacuum amplifier is in great demand because it is highly efficient.

Its tasks are extensive, but the amplifier copes with them all perfectly:

The degree of resistance of the brake pedal increases;
Reduces the load on the brake system;
Acts as a highly efficient auxiliary unit;
Has a positive effect on the service life of the brake system, etc.

This element has the following components:

Dense body, for the manufacture of which a high-strength polymer is used;
The diaphragm, which is also called the collecting node;
Monitoring or control specialized valve;
Pusher. It allows you to return the engine elements to their original position when there is no power;
Main piston rod of the brake system cylinder (main);
Switch return spring.

The body of this spring has two cellular divisions, which are divided into vacuum and atmospheric. Cells are often called chambers.

The vacuum chamber is a cell directly connected to the brake master cylinder.
The atmospheric chamber is a cell located opposite the brake pedal. Its open part of the body rests on the brake pedal.

It is also worth noting the diaphragm, which performs two very important tasks:

Corrects the position of the piston in space;
Pumps brake fluid to the main brake cylinders.

Installing a vacuum booster involves a serious change in the sensitivity of the pedal, so it is strongly recommended not to apply a large and sudden force to it in the “first couple”. Pressing should be done carefully and smoothly.