GTZ is an integral part of the brake system, which performs one of the key tasks - to convert the force applied to the brake pedal to form pressure in the system. The GTZ interacts through the "vacuum" rod with the brake pedal directly. The task of the GTZ is to evenly distribute pressure across all circuits.
In the photo: the main brake cylinder VAZ 2110
The brake cylinder is located on the cover of the "vacuum box" of the brakes. A reservoir for brake fluid is attached above it. The sections of the tank and the GTZ are interconnected by bypass holes, and are responsible for a specific section in the system. The reservoir itself is designed to make up for the loss of "brake". Visually, the tank has a transparent body, with a scale to control the liquid level. In addition to the scale, sensors installed in the tank are assigned to signal the liquid level, displaying information on the “tidy”.
Location of the GTZ
Types and device GTZ
Structurally, the GTZ is divided into the following varieties:
Single-circuit.
Double-circuit.
For clarity, we will consider the device and the principle of operation using the example of double-circuit GTZ. They are the most popular unlike their predecessors. The latter were installed for the most part on cars of the last century (different models of Moskvich, Zhiguli, GAZ, GAZ-53, 33 trucks (first modification), etc. The dual-circuit system is considered more efficient in terms of braking. Now it is equipped with most modern cars, both domestically produced (Lada Kalina, Priora, the Ten family, Samar, Granta, Vesta, Xray), and foreign (Renault Logan, Volkswagen Polo, KIA RIO, Hyundai Solaris, Opel Astra, Vectra, Chevrolet Lanos, Aveo, Cobalt, etc.).
The advantages of a dual-circuit brake cylinder system are that if, for example, one circuit failed, the brakes on one pair of wheels disappeared, but in the “battle” there was one more circuit to another pair of wheels, and hence the brakes, which are none.
Each of the circuits is responsible for a specific pair of wheels. So, if the car is rear-wheel drive, that is, separation, the first circuit is responsible for the front pairs of wheels, the second for the rear.
However, if we are talking about a front-wheel drive vehicle, then the distribution of responsibility occurs diagonally: L.P. / P. Z. and P.P./L.Z.
The master brake cylinder has two main varieties:
With bypass port directly in the cylinder body.
With bypass valve in the piston.
GTZ, where bypass valves are installed on the piston, are used for installation on vehicles with ABS systems. The fact is that in addition to bypass valves, valves were provided in such devices to maintain excess pressure in different circuits, which is especially important during ABS operation.
To make it clear, pistons are placed one behind the other in the brake cylinder housing. The first piston is acted upon by a rod from the brake booster while the second piston is secured, essentially "free" and moving by increasing pressure or "direct" action from the other piston. In order for the pistons to “walk” tightly around the cylinder, cuffs are installed at the edges. There is an additional seal in the space between the pistons. In addition, the device includes two springs, a stroke limiter, retaining rings and a plug.
Principle of operation
From the pedal to the first piston of the GTZ through the "" force is supplied, from which it begins to move. When moving in the cylinder, the holes are blocked, thereby increasing the pressure in the current section. Further, due to the pressure of the first section, the second piston begins to move, similarly blocking the hole of its “block”, increasing the pressure in it. When the desired pressure is reached, the machine slows down. Next, the springs "pull" the pistons back. Passing again through the same holes, the pressure decreases to the original. Excess brake fluid involved in the work is returned to the reservoir.
The principle of operation of the main brake cylinder
In cases where there is a leak in the system of one of the circuits, the operation of the node continues, but with some change, including the efficiency of work. If the leak occurred in the first "compartment", then the first piston will move until it hits the second. Further, already moving together to the plug, they will create pressure in the second "compartment". But, if the leak is in the second "block", then the pressure in the first will not rise until both pistons meet and rest against the plug. Only then will there be an increase in pressure in the primary circuit, and the brakes will work.
Signs, malfunctions and resource
Let's talk about the signs and malfunctions with the GTZ. So:
1. Pedal dips. A serious breakdown is often associated with the fact that the pistons do not work and, accordingly, do not generate the necessary pressure. As a result, the pads (especially if it is) cannot compress enough. It requires parsing the part and purchasing the necessary spare parts or the assembly as a whole.
Disassembled brake cylinder
2. Soft pedal. Often indicates that a certain amount of air has accumulated in the system. The solution is tritely simple - you need to pump the system. To do this, unscrew the relief valves and press the pedal until a “clean” liquid flows out of the holes, without bubbles.
3. Depressurization of the cylinder. If you notice that the fluid disappears, the effectiveness of the brakes has decreased, inspect the outlets from the circuits, fittings, connections. There should not be any drips, otherwise, we determine what caused the leak: cuffs, elastic bands or the case itself cracked. If the latter then it is better to buy a new part. Leakage through the gaskets, then it is enough to get by with a “repair kit”.
4. Jamming of pistons. Sometimes it occurs that the “vacuum” rod breaks off during braking, the pistons “wedge” at the same time, respectively, it is problematic to move the car. To solve the problem, you will need a complete analysis of the node, with a drain.
5. Boiling "brake". Everyone probably heard about routine fluid changes (depending on the class of car and model, the replacement period is about 40,000 km or two to three years). Boiling occurs due to the fact that a certain percentage of water accumulates in the liquid (for a year, as a rule, 3-5%), which means that the temperature load threshold is lowered (from an average of 200 to 140-150 degrees). During boiling, part of the liquid, due to saturation with air, returns to the container, as a result, very little of it remains in the GTZ. As a result, "pedal failures".
6. Worn cuffs, broken return spring. Many motorists for a long time cannot find the reason why the brakes “wedge”, even while driving. As a rule, the reason lies in failed seals or springs. They begin to leak fluid, do not return the pistons to their original position, and the effectiveness of the brakes decreases. Sometimes even loose pieces of rubber bands get into the channels and under the pistons, blocking their movement.
7. Development of pistons and cylinder. It is not uncommon that after long-term operation, not timely replacement of cuffs, wear is formed on the pistons, as well as in the cylinder itself. The way out is to purchase a repair kit and replace the entire pistons with rubber bands. However, first check the condition of the cylinder, if it is worn out, then it is better to buy a new part, polishing and boring is not the best idea. Permissible development is considered to be 0.15 mm.
The resource of the GTZ, depending on the model and brand of the car, may differ. As a rule, “native” parts serve at least 100,000 km, even on domestic cars. On some foreign cars, the GTZ "survived" up to 250,000 km. The old models of the "Japanese" - Corolla, Land Cruiser - often differ in resource.
Let's find out what could be causing the brake master cylinder to fail. First of all, its breakdown occurs due to the fact that the brake fluid is unevenly distributed inside the mechanism.
The cylinder itself consists of two working sections, each of which is responsible for braking one of the front wheels, as well as the rear one, located on the opposite side. You should know that in rear-wheel drive cars a completely different picture: the sections are responsible for the operation of the brakes, which are located along the axes.
The work of the GTZ itself begins from the moment when the pedal is pressed. If a vacuum booster is provided in the design of the car, then the brake cylinder contains 3 chambers, one of which converts pressing the brake into pressure, which makes it lighter. By pressing the pedal, a certain load is transferred to the section piston, which causes the brake fluid to press on the caliper. He, in turn, compresses the brake discs through the pads.
About checking GTZ
Malfunctions of the master brake cylinder can lead to its repair, as well as a complete replacement. It is recommended to start checking the brake cylinder with an external inspection. It is necessary to carefully check it for external defects and leakage of brake fluid. After a visual inspection, you need to check the operation of the brake pedal. To do this, it is necessary to press on it and make sure that there is no jamming and failure.
As for the main brake cylinder, it can not only wear out, but also rust from the inside over time. This is often due to the fact that the brake fluid contains oxygen and water in certain amounts.
The cylinder device is designed in such a way that if the brake fluid leaks from the first section, the other will remain in working order. That is, the first piston will pass through its own section, and will give movement to the second piston, which in turn will create the necessary pressure level for the operation of its own section.
If the second section leaks, then the operation of the first will look completely different. When the piston is working in a healthy section, the piston from the faulty one is involved in the work. That, in turn, moves forward freely and rests against the motion limiter, thereby blocking the outlet. In turn, the pressure in the first section increases, which leads to the braking of the wheel mechanisms.
As a result, when you press the brake pedal. In this case, braking efficiency is observed only at the end of the pedal stroke.
Failure of the GTZ and its replacement
One of the most common reasons why the master brake cylinder fails is its depressurization. In practice, this is noticeable to the naked eye: the brake cylinder will constantly leak, leaving a characteristic mark and a specific smell. in the tank will continuously decrease. All these signs point to the need to repair the GTZ and prevent irreparable consequences.
Depressurization of the brake cylinder is a good reason to replace it with a new mechanism. Malfunctions of the master brake cylinder, such as damage and severe wear of the piston seals, inlet cuff, piston return spring, as well as its scuffing and severe wear of the mechanism mirror, indicate a mandatory repair or complete replacement of the GTZ.
Your life and safety depend on the correct operation of the brake system. Therefore, when the above symptoms appear, it is urgent to eliminate the malfunction so that there is no sudden brake failure on the road.
The braking system is a key element that ensures the safety of movement in a car. Brake failures are highly likely to lead to accidents, so car owners are required to pay attention to the condition of the brake cylinders and hoses. At the first hint of a brake malfunction, it is necessary to check their elements and repair or replace parts. The most important component of the brake system is the main brake cylinder VAZ 2107.
The device of the main brake cylinder VAZ 2107
"Seven", like other modern passenger cars, is equipped with a dual-circuit hydraulic brake system. The separation of the brakes into front and rear circuits allows for braking even if one of the circuits fails. So, if the rear brake cylinder of the VAZ 2107 breaks down and the rear circuit is depressurized, the front brakes will remain operational (although it may be necessary to “pump” the brake pedal a couple of times to activate them, as the pedal travel will increase).
The master brake cylinder is the basis of the brake system. It changes the pressure in the brake circuits when the position of the brake pedal changes. When you press the pedal, the master cylinder creates increased brake fluid pressure in the system, forcing the pistons of the working cylinders to extend and press the pads against the brake discs and drums.
The main brake cylinder VAZ 2107 is fixed in the engine compartment on the body of the vacuum booster under a two-section brake fluid reservoir. The latter is designed to replenish the brake fluid in case of minor leakage from the system. Labels on the tank bodies allow you to visually control the level of brake fluid.
In the cylinder body there are two pistons with seals, which are located one behind the other. The first cylinder is driven by the pedal pusher, the second is moved by the movement of the first. Springs located inside the cylinder ensure that the pistons return to their place after the driver releases the brake pedal.
Signs of a bad brake master cylinder
There are three main types of brake master cylinder failure:
- swelling of seals;
- seal damage;
- piston jamming.
Often the third type of failure becomes a direct consequence of the first.
There are two signs of a master cylinder failure:
- brake fluid leak;
- pedal dips or “softness”.
To fix the problems, it is necessary to repair the main brake cylinder VAZ 2107. To do this, it is necessary to remove it, disassemble it, replace worn (damaged) parts and install the cylinder in place. . Alternatively, the brake master cylinder can be replaced with a new one.
What is needed to repair the master brake cylinder VAZ 2107
To remove, repair and replace the brake cylinder, you will need:
- keys for 13;
- special wrench for brake pipes;
- syringe;
- container for brake fluid;
- flat screwdriver;
- repair kit of the main brake cylinder;
- brake fluid.
Dismantling the master brake cylinder VAZ 2107
To avoid unnecessary loss of brake fluid from the tanks, it must be poured from there into a prepared container using a syringe. The procedure for removing the cylinder is as follows:
Note: the tightening torque of the brake pipes is very high, therefore, attempts to unscrew them with a conventional open-end wrench can only lead to “licking” of the edges.
- unscrew the nuts fixing the main brake cylinder to the cover of the vacuum booster;
- remove the brake cylinder.
Master brake cylinder VAZ 2107: repair
In order not to lose details and not to stain master brake cylinder VAZ 2107, repair should be carried out on a prepared table. A vise is needed to disassemble the cylinder.
The repair procedure is as follows:
- clamp the cylinder in a vise and loosen the plug nut;
- put the cylinder on the table, carefully unscrew the plug nut and remove the parts from the cylinder;
Note: it is necessary to unscrew the plug nut very carefully so that the cylinder parts do not scatter under the influence of the springs.
- replace rubber seals on pistons;
- assemble the master cylinder parts and tighten the plug nut.
Installation of the main brake cylinder VAZ 2107
The repaired brake cylinder is installed in place in the reverse order of removal. Pay special attention to tightening the metal hose fittings. After installing the cylinder, it is necessary to fill the tanks with brake fluid and bleed the brake system, removing air from it.
If we talk about self-repair of the VAZ brake master cylinder, then for non-specialists it may seem that it is difficult, although there is no need to be afraid, since it is quite possible to repair it yourself.
Before repairing the brake system, the brake master cylinder must be repaired first. Do this after the initial diagnosis.
How to disassemble the main brake cylinder VAZ
If we talk about the device of the main brake cylinder, then we can consider the example of one of the most popular brake systems - the hydraulic drive of the VAZ 2-circuit brake system. It is the knowledge of this device, which is actually simple, that will help to carry out repairs.
Immediately it should be noted that the nodes of the primary and secondary pistons are not repaired. They will need to be replaced with new assemblies when the new cylinder is assembled.
Includes hydraulic drive such parts:
- master brake cylinder;
- vacuum brake booster;
- brake pedal;
- hoses and pipelines for moving brake fluid;
- wheel (working) brake cylinders. If you repair the master brake cylinder, then the working brake cylinder does not need to be repaired;
- expansion tank.
The master cylinder contains 2 pistons, which are needed for the brake circuits, o-rings and return springs. The task of the master brake cylinder is that, after pressing the brake pedal, it should evenly distribute the brake fluid along the circuits in order to further transfer the brake fluid along the circuits for subsequent transfer to the working brake cylinders.
If the brake system is working, then the pressure will be the same in two circuits. If brake fluid leaks from one circuit, the second is able to provide braking.
Diagnostics of the main brake cylinder
Before repairing the master brake cylinder, it is necessary to diagnose it. Before diagnosing, you need to know what methods are available for this. If you have to repair the brake system, for example, the rear or front brake cylinder. All procedures must begin with a check of the GTZ.
The main malfunctions of the master brake cylinder are more often due to the fact that the brake fluid is unevenly distributed along the circuits. For example, this may be due to the fact that the brake fluid is leaking or the brake system is air-filled. If everything is taken into account, then each pair of wheels is responsible for its own circuit, pressure may drop in one circuit, but this will not be a problem.
The second circuit will work in any case. The second pair of wheels will slow down the movement of the car. However, this will reduce braking performance. This does not mean that in normal mode the car will not work with a faulty GTZ. It is better not to postpone the repair of the brake master cylinder for a long time.
Methods for diagnosing the main brake cylinder
- first you should pay attention to the indicators of control devices in the cabin - if the brake system is faulty, then the indicator lamp will light up;
- visually it is necessary to check the body of the main cylinder - whether there are smudges of brake fluid on it, especially in those places where the pipeline is connected to the outlets of the circuits;
- also, the GTZ body must be checked for mechanical damage on it;
- in the circuits, you need to measure the pressure: attach pressure gauges to the openings of the circuits, measure the pressure. The obtained figures must be compared with the control ones, which are indicated in the instructions for the operation and repair of the car. You can see that the circuit is faulty.
After an external inspection was carried out, it is necessary to disassemble the GTZ. You need to understand that it will not work to check the GTZ for leaks in garage conditions, since a special stand is needed.
Dismantling and repair of the main brake cylinder VAZ
After starting the disassembly of the brake master cylinder, all parts must be washed with alcohol. All rubber products must be replaced with new ones. To do this, there are a variety of repair kits for all brands of cars. When repairing brakes, you do not need to think that everything is fine and can still serve.
If, as a result of disassembly, it became clear that the gaskets (rubber-technical products) were swollen, then the fault would most likely be the brake fluid, which may be of poor quality or may not be suitable for the car. Also, the liquid may be unusable due to contamination.
There are several requirements for pistons and the GTZ mirror - there should be no scoring, scratches, mechanical damage. With the replacement of piston assemblies, everything should be clear.
In no case should you try to repair the GTZ pressure regulator. They change it in the kit, as manufacturers set the parameters.
The important thing is that if you completely change the main brake cylinder or dismantle it, but you must not forget to pump out the brake fluid from the distribution tank, plug all pipelines. It is also worth remembering that after replacing or carrying out the brake system, it is imperative to bleed the brake system.
Complete replacement of the GTZ with a new one is far from one of the most economical repair options. In this case, it is better to calculate the cost of repairs, the purchase of a repair kit and the purchase of components.
Using the GTZ repair kit
Repair kit for brake master cylinder- the basis for carrying out repair work with the GTZ. In turn, the GTZ is one of the most important parts of the car's brake system, which must always be in good condition. This ensures the safety of the car, the driver and passengers, as well as the prevention of an emergency on the road.
Remkomplekt on the main brake cylinder allows you to eliminate the main malfunctions, and save the car owner from having to buy a new GTZ. As a rule, it includes various rubber bands and cuffs, the purpose of which is to ensure the tightness of the brake system, because its loss is the main cause of automotive brake failure.
The composition of the repair kit
The composition of the brake master cylinder repair kit differs depending on several factors:
- car model for which the set is intended;
- manufacturer;
- the composition of the kit (complete or incomplete).
So, the kits differ from each other not only in the presence of certain consumables, but also in their number. Complete kits include the items listed below, while incomplete kits only include the cuffs. So, in most cases, the repair kit includes the following consumables:
GTZ repair kit for VAZ-2109
- separating cuff of chambers;
- the main cuff of the piston of the cylinder;
- outer cuff of the cylinder;
- sealing cuff for GTZ;
- protective cap for GTZ;
- seal for the piston head;
- cap for fitting the bleed hoses from the clutch release cylinder;
- pistons (primary and secondary);
- return springs for pistons;
- sealing rings for pistons;
- saddle for pistons;
- piston spring retainer and retainer screw.
Use the repair kit of the master brake cylinder should be in case of malfunctions in its operation. About them further.
Signs of a bad brake master cylinder
There are a number of objective signs indicating that the GTZ is faulty. These include:
- The appearance of brake fluid on the housing of the vacuum brake booster where it meets the brake master cylinder. The reason for this is that the low-pressure collar cuff in the GTZ has failed, as a result of which it needs to be replaced.
- “Soft” feeling in the pedal. In this case, the most likely reason is that air has entered the system due to depressurization of the brake hydraulic system. Another option is the wear of the cuff of the pistons of the main brake cylinder or the wear of the “mirror” of the GTZ.
- Wedging the brake pedal. The reason for the failure of such a problem is that there is a clogging or blockage of the compensation hole in the body of the main brake cylinder.
- Brake pedal sticking during the braking process. This symptom can be caused by wedging of the pistons in the master cylinder in case of dirt entering the system. This, in turn, may be due to the fact that the brake fluid "pulled" moisture, since it is hygroscopic. Along with dust, small solid particles can also enter the system. That is why automakers recommend.
- Not returning the brake pedal to its original position after pressing. There may be several reasons for the problem. For example, the failure of one or two return springs of the GTZ pistons or a malfunction in the brake pedal drive.
The device of the main brake cylinder
Knowing the structure of the brake cylinder, you can easily cope with its repair by applying the necessary elements from the repair kit. Most modern cars use a GTZ, consisting of two sections, each of which is responsible for the operation of a pair of wheels. In the case of a front-wheel drive car, one circuit works with the front left and rear right wheel, and the other with the front right and rear left. If we are talking about rear-wheel drive cars, then one circuit is responsible for the front brakes, the second for the rear. The use of two circuits makes the braking system much more reliable.
GTZ scheme
The main brake cylinder consists of the following parts:
- Frame. It contains all the working mechanisms of the cylinder.
- Expansion tank. Its task is to feed the hydraulic system with a working fluid.
- Working tubes designed to pass liquid in the circuit.
- Pistons. Thanks to him, the necessary pressure is provided in the system.
- return springs. They work as a counterweight to the pistons, raising them and holding them in their original position, provided there is no opposition.
- Cuffs and rings for sealing. Their task is to ensure the required level of tightness both in the cylinder and in the hydraulic brake system as a whole.
- Differential pressure sensors. They transmit information to the ECU, which, in turn, informs the driver about malfunctions in the hydraulic braking system (pressure drop, low fluid level, and so on).
Without knowledge of the principle of operation, you will hardly be able to check the correctness of its operation. So further we propose to understand how the GTZ works and check its serviceability.
The algorithm of the main brake cylinder
The main task of the GTZ is to convert the pressure available on the brake pedals of the car into the hydraulic pressure of the brake system using the working cylinders. That is, it is the main distribution link, thanks to which the working fluid is supplied to the actuators.
While pressing the brake pedal, pressure is created in the line, due to which the vacuum booster rod pushes the first piston of the cylinder, which closes the compensation hole. As a result, the pressure increases in the first, and then in the second circuit. And the voids that occur during the movement of the pistons are filled with a working fluid. In this case, the movement of the pistons themselves will take place as long as the return spring allows it.
When the maximum pressure in the circuits is reached, the brake mechanism is activated. After the driver takes his foot off the brake pedal, the springs return the pistons to their original position, and the pressure in the system normalizes (becomes atmospheric). There is an expansion tank in the system, where the brake fluid returns, thus preventing the creation of a vacuum in the system. If one of the cylinder circuits fails, the other will continue to work, providing braking, albeit with less efficiency.
Only special brake fluid recommended by the car manufacturer should be used in the system. It has a high boiling point and high resistance to mechanical compression. Buy original oil!
Checking the Master Cylinder
The design of the master brake cylinder involves the use of sealing rubber parts, which periodically fail and become the main problem during the inspection. Therefore, if the brake system malfunctions as described above, it is necessary to check its operation. And you need to start with the GTZ. The check is performed in the following sequence:
- Necessary check for leaks on the case, as well as the presence of cracks on it.
- Next you need check tightness and the condition of the sealing elements of the cylinder. With any amount of repair work carried out, it is imperative to replace all rubber seals that are included in the repair kit for the main brake cylinder.
Checking the tightness of the cylinder is carried out on a special stand. Therefore, in a conventional garage, this procedure is hardly possible.
- It is also necessary check cylinder mirror. It should not have shells and damage. In addition, it is not allowed to change its geometric shape (turning into an oval).
- Need check clearance between pistons and cylinder. Its increase in excess of the norm specified in the manual for your car is not allowed.
If the check showed the appearance of changes in the operation of the GTZ, then without waiting for its complete failure, we recommend repairing it by replacing some elements from the repair kit. Please note that it can only be used to eliminate minor malfunctions (for example, brake fluid leaks).
In the event that it was cylinder mirror damaged, that is, scratches, shells or other damage appear on it, then it becomes unrepairable. The only way out in this case is to completely replace it.
Repair and replacement of the brake master cylinder repair kit
After you have found out the cause of the breakdown, you need to buy a brake master cylinder repair kit. They are divided into two main types - complete and incomplete. For some cars, an additional special key is required (for example, for VAZ 2110). The complete set includes: plastic cones for mounting new cuffs on the piston body, washers, springs, anthers, all the necessary cuffs. If the kit is incomplete, then, as a rule, only GTZ cuffs are included in it.
How to change the brake master cylinder repair kit? The algorithm for performing work is as follows:
GTZ repair kit for VAZ 2108-2109
- Remove the negative terminal from the battery and the terminals from the brake fluid reservoir. This is done so that the electronic control unit does not display an error message in the future.
- Next, you need to drain the working fluid from the system. This is done using a medical syringe and tubes. Some liquid will still remain in the system, so prepare a rag to eliminate drips in advance. All disconnected pipelines must be “plugged”.
- After that, you need to proceed to the removal of the GTZ itself. This process will literally vary slightly for each car model, so it is impossible to give specific recommendations within the framework of one article, but one thing is for sure that it is bolted to the vacuum cleaner with only two studs.
Further repair of the main brake cylinder must be carried out on the desktop (workbench). As practice shows, the overhaul of the GTZ in a garage is impossible or does not bring the desired results. Therefore, we confine ourselves to considering the case of replacing rubber seals from the brake cylinder repair kit.
Please note that during dismantling, brake fluid will leak from the cylinder, which may fall onto the table or surrounding objects. Therefore, we recommend that you lay a rag or thick paper at the initial stage so that the oil flows onto it.
- For dismantling, it is necessary to unscrew the locking and fixing bolts of the mechanism. Then disassemble the case. This must be done carefully. so that the springs inside do not scatter to the sides.
- Remove all old rubber seals and cuffs from the housing, then clean their seats from possible dirt and dust with oil.
- When assembling, all new rubber seals must be lubricated with the brake fluid used (preferably new). And it is better to replace the copper rings under the locking bolts with new ones. It is better to cover the fixing and locking bolts with copper grease (spray or paste) so that in the future, if necessary, they do not stick and can be easily unscrewed.
It is strictly forbidden to repair the GTZ pressure regulator. The regulator settings are set by the manufacturer during its manufacture, so pressure regulators are changed entirely.
Replacement of a repair kit of the main brake cylinder
Using a repair kit for GTZ VAZ
Assembly and installation of the cylinder in place is carried out in the reverse order. Don't forget to attach the battery terminal. It is imperative to fill the system with a new working fluid (it is also used to lubricate new rubber sealing parts), after which it is performed in order to expel air from it.
Repair kit manufacturers
Popular manufacturers of brake master cylinder repair kits used in our country are the following companies:
- CJSC “Volzhskrezinotekhnika”. The enterprise produces repair kits for domestic cars - Zhiguli, Moskvich and other popular brands (for Moskvich 2140 it consists of 3 pairs of cuffs, each of which has its own cat. No. 412-3505045, 042 and 036).
- FENOX Global Group (Belarus). The company produces a wide range of repair kits for domestic and foreign cars. In particular, for the VAZ-2101, 2106, 2107 and VAZ-2121, the catalog number of the GTZ repair kit is KPT1963C3, the price of the repair kit is $1.3...1.7. And for Moskvich 2140-3505032.
- PJSC "Balakovorezinotekhnika" A manufacturer of rubber products that produces more than 6,000 items and ensures the smooth operation of VAZ, KamAZ, GAZ auto conveyors (catalogue number for the GTZ repair kit for VAZ 2108-09 cars is 21080350503300, repair kit from the manufacturer, price - about $ 1).
- Company "Basalt". Russian manufacturer producing GTZ repair kits for domestic cars.
- SEIKEN. A manufacturer from Japan that produces repair kits mainly for Japanese cars (for example, HONDA, kit catalog number is SK62811, the price of a brake master cylinder repair kit is $16...18).
- Aisin Seiki Co Ltd (or simply Aisin). Another Japanese company producing components for car assembly plants. He produces many products for Toyota.
- SEGURIDAD INDUSTRIAL, S.A (SEINSA), Spain. Produces products, including GTZ repair kits under TM AUTOFREN. Used in many European cars. (for example, the catalog number of the set is D1298, the price is $2...3).
- DELPHI Company, USA. Its repair kits are used on both American and European cars (for example, Mercedes).
- ATE, Germany. It produces repair kits for European cars (for example, catalog number 03037030232, the price of a GTZ repair kit is $20...25).
I would like to remind you that...
With the help of the GTZ repair kit, only minor malfunctions in its operation can be eliminated - brake fluid leakage, pedal operation smoothness, brake system adjustment. If the cylinder is physically damaged, then in most cases it must be completely replaced, and unfortunately, replacing the cuffs is not enough.
Upon completion of work on replacing the repair kit of the main brake cylinder don't forget to bleed the brake system to ensure its tightness and the absence of air in it. And before leaving the road test the efficiency of the braking system near the garage, while observing safety rules.