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How to use the brake cylinder repair kit

At the heart of each brake system are brake cylinders. They have a simple device. But in order to perform repairs, you need to know their design, as well as the symptoms of failure. Repair involves the installation of new sealing elements, for which the repair kit of the brake cylinder is made. We will talk about this in our today's article.

Features of the brake system in the car

The working fluid due to its composition is characterized by a low coefficient of compression. It requires a very high temperature to boil it. Therefore, it is used. Modern brakes are usually of a two-circuit type. On the contours, the fluid moves and acts on the actuators, thereby compressing the pads.

In vehicles with front-wheel drive, the brakes for the front right and rear left wheels are serviced by the first circuit. The second is responsible for the front left and right rear. The design of the system in rear-wheel drive vehicles is slightly different. Here, the first circuit ensures braking of the front wheels, and the second one - for the rear wheels.

Each of the two circuits in the braking system is separated by separate chambers located in the master cylinder or in a vacuum amplifier. This makes it possible to provide partial braking when one of them fails. The described design is quite reliable, but sometimes it can fail. Therefore, to repair the breakdown, use the repair kit of the service brake cylinder or the main cylinder (GTZ). It allows you to return workability to important technical elements.

Brake Cylinder Assembly

The GTZ function is the transfer of force from the pedal and converting it into a pressure on the liquid, which will then pressure the brakes. The master cylinder is distributive. It is a body inside which there are pushers and pistons.

Outside is a tank. It contains liquid. In order to increase the efficiency of the brakes and to reduce the required force when the pedal is pressed, the vacuum amplifier also exists in the design of modern cars. It is installed together with GTZ. The latter is directly above the cover of the vacuum amplifier. The tank with GTZ has openings - compensatory and bypass.

Also, the device has connecting tubes. They connect the tank to the liquid and cylinder. Return springs ensure the movement of the piston in its original position. Cuffs serve to prevent fluid leaks. Also in the system are installed pressure differential sensors. They, in the event of a malfunction, inform the driver of the car of breakages in the circuit.

The main elements of GTZ are pistons. They are installed one after another. One of them is crushed by a rod of the vacuum amplifier, while the second piston can move freely. The system is protected from leakage of working fluid due to rubber cuffs. These elements have to be replaced periodically - for this use the brake cylinder repair kit.

Operating principle

When there is pressure on the pedal, the VUT rod acts on the piston. It will block the compensation hole during the movement. This will increase the pressure in the first brake circuit. Then the pressure will rise in the other circuit.

The maximum value of the pressure will ensure the operation of the brake mechanisms. When the brakes are no longer needed, the pistons will return to their original position under the action of the return spring, and the pressure will again close to atmospheric pressure.

Typical malfunctions and signs

When the pads are excessively worn out, or if the brake fluid leaks from the system, its level is lowered, a diagnosis should be made. The car is not recommended to be used until the malfunction is eliminated. It is necessary to examine all the elements of the system. Faulty parts are replaced, and the main consumables contain a brake cylinder repair kit.

Depressurization, soft pedal, inefficient braking

The efficiency of the system can be reduced if it loses its tightness. The pedal becomes soft due to incomplete pumping or falling into the air contours. These signs can also be observed if the master cylinder fails, if the worker is stuck or overheated, or the liquid boils up in it.

If the pedal is too hard, the fault should be found in the vacuum amplifier, hose or VUT control valve. If the faults occur with the rear brakes, then the repair of the rear brake cylinder will come to the rescue.

High pedal travel

This happens when the adjustment of the drum mechanisms is incorrectly performed. It can also happen with air-blasting or worn-out pads. This fault is very dangerous, because in the required situation the braking will not be effective. This leads to emergency situations.

If the brake pedal fails, the brake should be found in the cylinders. Probably, the working or main element is too worn out, or the system has become depressurized. To solve the problem, you need to replace the seal, and this will help repair the brake cylinder.

Grind

This indicates excessive wear of the pads. To eliminate this problem, it is enough to replace the pads or the disk. Whistle speaks of substandard friction elements. Repair kit in this case is not needed.

The pedal jams and jams

The reason for this malfunction is that the compensation hole in the GTZ housing is clogged or blocked.

If the pedal jams, this indicates the wedging of the pistons in the GTZ because of the dirt in the cylinder. Also this may indicate the presence of excess moisture in the working fluid - it is hygroscopic. With dust, small particles can enter the system. That is why it is recommended to regularly change the liquid in the system.

The pedal does not return after pressing

There are several reasons for this malfunction. So, the return springs on the GTZ pistons can fail. Also, various breakages in the pedal drive are possible.

Brake fluid on the body of the VUT

The liquid or its traces appear in the place where the VUT is connected to the brake cylinder. The reasons are related to the failure of the collar cuff of low pressure in the main brake cylinder. It must be replaced. This item can be taken from the repair kit. It is cheaper than a new element in the collection.

What is available in the Reconstruction Kit of GTZ

So, the repair kit of the main brake cylinder VAZ and other cars contains everything necessary for the restoration of the nodes. The kit depends on the cost, the manufacturer, and also on the type of work for which the kit is intended.

Consider that it contains a repair kit for the brake cylinder for VAZ-2110. In it you can find:

  1. Protective cap for GTZ.
  2. Seals for the head on the piston.
  3. The cuff for the GTZ.
  4. Cap for bleeding hose from clutch release cylinder.
  5. Two pistons and return springs for them.
  6. Sealing rings, saddles.
  7. Holders for springs.
  8. Screws holder.

The kit may be incomplete, in which there are only GTZ cuffs and full, where all of the listed details are available. Specialists recommend in the case when it is necessary to replace the repair kit of the brake cylinder, To acquire the latter type.

Diagnostics

The first step is to perform diagnostic procedures. So, check the cylinder for leaks and cracks, as well as sealing elements for tightness. Additionally, look at the status of the cylinder mirror - it should not have shells, as well as other damages. Not allowed and geometric changes of the mirror. Then check the gaps between the cylinder and the pistons.

If the brake system has any changes, then repair it will help repair the brake cylinder. However, with its help it is possible to eliminate only minor malfunctions.

Restoring the working capacity of the cylinders

First of all, remove the negative terminal with the battery and the terminal from the reservoir, which contains the brake fluid. This is necessary so that the computer does not display an error message. Then, the entire fluid contained therein is drained from the brake system.

This is done with syringes and tubes. Part of the liquid from the system will not go away, so you need rags to remove possible stains.

All pipelines that have been disconnected must be muffled. Then they remove the GTZ. After dismantling the cylinder, remove the old sealing parts, and also the cuffs are removed from the housing. Then clean the seats of the sealing parts from dust and dirt.

Conclusion

The braking system is an important part of any car. With repair kits you can quickly and inexpensively restore the main parts of the system, which most often fail. The main thing is to remember the timely update and, if necessary, a complete replacement of the repair kit of the master brake cylinder Or other important parts of your car.

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