Setting the brake pressure regulator VAZ 2109

adjusting the brake pressure regulator drive on VAZ 2108, VAZ 2109, VAZ 21099 cars

Improper adjustment of the brake pressure regulator drive can cause the vehicle to skid or pull to the side when braking, and also reduce braking efficiency. 1. Place the VAZ 2108, VAZ 2109, VAZ 21099 car on the inspection ditch and “push” the rear part of the car several times with a force of about 392-490 N (40-50 kgf) to install the rear suspension in the middle position.

2. Loosen the front bolt securing the brake adjuster to the bracket.

3. Using the wire as a feeler gauge, adjust the bracket so that the gap between the brake pressure regulator drive lever and the lever spring is 2.0-2.1 mm.

4. To do this, move the drive lever by the protrusion. In this position, tighten the bolt. 5. If the brake pressure regulator is correctly adjusted, when braking from a speed of about 40 km/h on a level section of paved road, the front wheels should lock slightly earlier than the rear wheels (this can be determined by an observer outside the vehicle). Otherwise, increase the gap (if the rear wheels lock earlier than the front ones) or decrease it (if the rear wheels lock much later than the front ones). After this, check the brake adjustment again and, if necessary, repeat the adjustment of the brake pressure regulator drive again.

Source

Stages of work

The process of raising the car's lighting line in bodies 50, 40, 30 and 55 is quite similar and consists of several stages:

First you need to check the standard settings for the electric headlight range control and make sure it is working correctly (on newer cars this unit may work, but on cars older than 5 years it may have problems). If it fails, the first step is to replace the corrector and only after that proceed to adjusting the headlights of a car with a body size of 50 and 30.
After this, before starting work, you need to find a place to park the car.

All you need to adjust is the 8-key key and, for convenience, some special sockets with curved tips.
When the corrector is working correctly, it is necessary to measure the distance at which it adjusts the light beam and outline its magnification level, which is twice the maximum (corresponding to one in the corrector setting).
Having prepared the tool and checked the correctness of the corrector, open the hood of the Toyota 50 (or 30, 40) and find the plastic adjustment plug in the engine compartment. It is located directly behind the headlight housing.
Then you need to mark the expected level of the light beam after adjustment with a ruler and, accordingly, begin the adjustment (before that, set the corrector to position 0).
There is a special adjustment screw on the back plastic cover; if you rotate it, the light output will gradually increase to the desired level (rotation should be done slowly to avoid damaging the plastic parts of the screw). You also need to rotate to achieve a certain level of light output.
Then tighten the screw and measure the headlight level.

Brake pressure regulator, or how the sorcerer works on VAZ cars

A brake force regulator, or sorcerer in common parlance, is a mechanical device designed to relieve excess pressure in the rear drum brakes.

On VAZ-2109, VAZ-2108, VAZ-2114 and other front-wheel drive models produced in Togliatti, it was installed in the rear left part of the body, under the bottom, in front of the rear suspension beam. The brake pressure regulator on the VAZ-2107 model and other “classics” is located on the right in the direction of travel of the car.

New vehicles equipped with ABS and EBD do not use the sorcerer.

Design

The handbrake (RT) system on VAZ 2109 cars is quite simple. It includes two main nodes:

Braking devices for rear wheels;
Mechanical drive.

The drive, in turn, consists of:

Handbrake lever located in the cabin on the right hand of the driver;
Front and rear drive cables.

The ends of the rear cable are connected to the levers of the manual brake shoes. In the section where the front cable is brought to the rear area we are dealing with the following elements:

Equalizer;
Adjusting nut;
Tension spring and locknut. They connect the front cable to the car body bracket.

By releasing the lever, the spring releases the tension on the cables and the equalizer returns to its original position. This is where adjustment is required.

Dismantled RT handle

Why do you need a brake force regulator?

The function of the regulator is to temporarily reduce the braking force during heavy braking. The fact is that force evenly distributed on the rear and front axles can lead to a skid of the car. If the rear brakes start working a little later and weaker than the front ones, this does not happen.

Based on the above, we can conclude that the sorcerer is an element of the car’s safety system, partly preserving its stability on the road when the brake pedal is pressed in an emergency. On modern models, this function is performed by ABS. That is why there is no need today to use a technically outdated device in production.

The liquid turned into soda

The working fluid of brake hydraulics is capable of transmitting force only if it retains its incompressibility. Liquids and solids have this property, but not gases. The appearance of any of them inside the system ensures its failure. The reasons why the brake pedal fails can be different.

The system seals are made of a material that blocks the path of both liquids and gases. But at a certain stage of their aging, a stage is possible when they still hold liquid with difficulty, but air begins to pass almost unhindered. As a result, during any braking, the moving parts are likened to a pump, pumping outside air into the hydraulic area. It accumulates and partially dissolves in the liquid. The incompressibility of the working fluid disappears, the stroke of the working cylinder rod increases.
In addition to the external penetration of parasitic gas, it can also form from the liquid itself. It has the property of hygroscopicity, that is, it is capable of dissolving water vapor from the atmosphere well. The boiling point of water is significantly lower than that of the original composition, which engineers specially worked on, increasing its temperature threshold. The resulting water vapor is a gas, so the phenomena already described above occur. Moreover, this will happen at a critical moment, when the brakes work intensively, which is accompanied by heating.
More prosaic reasons for airing the brakes are also possible. These are errors in their repair and poor pumping. This is what will appear the first time you try to brake urgently.

Treatment of the situation comes down to following basic brake care rules. The fluid must be changed on time, as specified in the instructions for the car, and not use cheap substitutes. Inexperienced personnel who have little understanding of the technological process should not be allowed to repair brakes.

It should be remembered that it is impossible to achieve ideal rigidity when the system is activated. There is always a certain finite elasticity of its elements. This is even associated with one of the methods for checking the functionality of the vacuum brake booster, when after a hard stop with the ignition off, the brake pedal still sinks a little while the engine is running.

How does a sorcerer work?

The regulator itself consists of a cylinder, valve, spring and rod. The latter is connected to the rear beam, which ensures the operation of the VAZ-2109 sorcerer. Also, brake fluid circuits pass through the rear brake pressure regulator. For their mounting on the device there are 4 threaded entries. » alt=»»> How does the sorcerer regulator work on a VAZ? During emergency braking, the front of the car is pressed to the ground, and the rear is raised. This causes the regulator rod to move, which blocks the flow of fluid to the rear cylinders. A spring located under the valve prevents it from closing completely. Therefore, the rear mechanisms still work, but later and weaker than the front ones.

labavto.com

Brakes are one of the most important systems of a vehicle. They must always be in good condition, as safety on the road depends on them. One of the procedures that is carried out during brake repair is bleeding the brake system (TS). On a VAZ 2109 it is not difficult to carry out it, acting step by step according to the instructions.

Why do you need to bleed your brake system?

This procedure is carried out to restore its functionality and effectiveness. Air is removed from the vehicle lines by pumping. This procedure is carried out after carrying out any measures with the brake system:

Repair work;
replacing brake fluid (TF);
replacing rubber tubes:
replacing pads.

During repair work and brake replacement, air may enter the system. Its presence in vehicle lines is very dangerous - the brake pedal simply does not respond to pressure and it is impossible to stop the car. Therefore, its removal is necessary.

When working with brake fluid, you must be careful, as it and its vapors are very toxic. It is advisable to work with gloves

If brake fluid gets on your skin, it should be washed off immediately with warm soapy water. Do not allow the fluid to come into contact with wires or plastic parts and trim while pouring fluid into the reservoir.

Basic pumping rules and preparatory activities

The brake system of the VAZ 2109 consists of two independent circuits. If one of them fails, the other operates, this increases traffic safety. If work was carried out on only one of the cylinders or other elements of the brake system, then pump the corresponding circuit on which the repair was carried out. If brake hoses, brake fluid were changed, or the master cylinder was removed, it is necessary to bleed both circuits.

Bleeding is carried out in a strictly defined order; if it is not followed, the procedure will be useless and problems with the pedal will remain. You can pump only one circuit. If both are pumped, then start the process from the rear right wheel. Next they move to the left wheel in front. Next, they return to the rear wheel pair and bleed the rear left wheel, and finish on the front right one. The procedure for pumping the vehicle is described in the “nine” manual.

Before performing work, you need to check the vehicle for leaks. To do this, the car is driven onto a lifting device or pit for inspection. Clean the joints of pipes and lines from dirt without using sharp objects or blows. You need to clean it with a rag, making vertical and circular movements. First one side, then the other.

After pumping the pedal several times, you need to lock it in the pressed state, go down under the car and check all connections and conditions of the hose. They must be kept dry. If leaks are found in the connections, they must be eliminated by tightening the connections. You need to tighten it carefully, without unnecessary effort. Check the attachment of the pipes to the body. If necessary, replace with new ones.

Make a visual inspection of rubber parts. If there are cracks or tears in the shell, they must be replaced. They could become unusable due to mechanical damage or due to contact with working fluids. According to the manufacturer’s technical standards, hoses should be changed after 5 years of operation or 150 thousand kilometers. The check should also be carried out in the engine compartment.

For pumping to be effective, you need to properly prepare for it. The following steps should be followed:

Check what level the coolant is in the expansion tank. If its level is below the maximum, then add liquid to the required level.

Prepare an empty container, you can take a plastic bottle. Pour some brake fluid into it.
Prepare a rubber or vinyl transparent hose. Its internal diameter must correspond to the diameter of the release valve on the working cylinders and calipers. If you cannot find the hose, you can remove it from the windshield washer for the duration of the procedure.
The tools you will need are ring wrenches for “8” and “10”.
If the rear pair of wheels is in a suspended state, then you need to insert a screwdriver between the plate and the pressure regulator to block it. After work, the screwdriver must be removed.

Setting the brake force regulator

Adjustment of the sorcerer should be done on an overpass or inspection hole. At the same time, the car is unloaded and driven to the work site. To perform the manipulation you will need:

Socket wrench 13 or corresponding socket;
Drill diameter 2 mm.

To adjust the sorcerer, use a wrench to loosen the bolt securing it to the lever bracket. Next, use a screwdriver to move the bracket until the resulting gap allows you to insert a prepared two-millimeter drill into it. After this, the bolt is tightened.

Note: the brake pressure regulator of the VAZ-2110 and previous VAZ models turns sour during operation so that it is not possible to move its bracket. In such a situation, you should pour WD-40 liquid over the rusted area, wait 15-30 minutes, and then use a hammer to move the part to the side using a soft drift.

Replacing the brake pressure regulator

The replacement of the sorcerer on VAZ-2110 cars and other vehicles equipped with an RTD is carried out on an overpass. You need a 13 mm spanner, a powerful screwdriver and a special 10 mm wrench designed for unscrewing brake pipes. Before starting work, the assembly must be cleaned of dirt and rust, doused with WD-40 or another penetrating compound, and then wait half an hour.

Work begins by unscrewing the bolt securing the bracket to the spring. Afterwards, the brake pipes are dismantled, the position of which is recommended to be pre-marked.

You can also unscrew the tube fittings with a regular wrench. However, using a special tool makes the job easier and reduces the likelihood of “licking” the edges. After the fittings, unscrew the two bolts securing the sorcerer to the body and remove the part. » alt=»»> It is necessary to install the new VAZ-2110 sorcerer in strict reverse order. After installing it and before adjusting the RTD, you should bleed the rear brake circuits. Next, the above-described procedure for setting up the sorcerer is performed.

Examination

The operation of the VAZ-2109, 2110 and other AvtoVAZ models is checked on the move, in closed areas. To do this, accelerate the car to a speed of 40 km/h and sharply press the brake. The rear wheels should lock 1/2 second later than the front wheels.

The wheels are monitored by an assistant located outside the car. If wheel locking occurs noticeably later or does not occur at all, and also if the rear axle is locked simultaneously with the front, the sorcerer adjustment procedure is repeated.

To increase the response time of the rear brakes, the gap between the adjuster and the bracket is increased; to shorten it, it is reduced accordingly.

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Messages 1 to 20 of 121

1 Topic by Kirey 2009-04-26 16:01:22

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Topic: Without the "sorcerer".

The question is: Has anyone gotten rid of the regulator? Instead, they install tees from the classics. The result is equal force on all wheels. Subscribe who did, saw, heard anything!

2 Reply from StreetGlow 2009-04-26 16:52:05

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Re: Without "sorcerer".

I heard they do. I think there will be excessive force on the rear wheels, because... Samara's backside is light. The wheels will be blocked.

3 Reply from Biker22rus 2009-04-26 20:56:49

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Re: Without "sorcerer".

I tried it, it doesn't work out well. Before you throw away this device, just try to press the adjustment plate tightly, it will have the same effect as without it.

4 Reply from ZipeR 2009-04-27 08:32:27

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Re: Without "sorcerer".

It will be worse with standard brakes!

A friend removed it and it began to turn around when braking! it became normal when I put the ventel 15 forward and the stock 13 discs back!

5 Reply from Kirey 2009-05-12 08:40:34

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Re: Without "sorcerer".

I threw this sorcerer out! It seems to be slowing down, I just need to bleed it (I can’t find any help).

6 Reply from kamaz5310 2009-05-12 16:41:13

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Re: Without "sorcerer".

yy, they will fuck you for it)). Because making changes to the brake system is prohibited. Otherwise, it’s better without it; the plate always comes off the rod))

7 Reply from Kirey 2009-05-13 17:25:33

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Re: Without "sorcerer".

yy, they will fuck you for it)). Because making changes to the brake system is prohibited. Otherwise, it’s better without it; the plate always comes off the rod))

They won't fuck! This car will never pass so. 1000 rubles and a piece of paper in your pocket!

8 Reply from hahol_st 2009-05-14 01:08:28

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Re: Without "sorcerer".

I threw this sorcerer out! It seems to be slowing down, I just need to bleed it (I can’t find any help).

I think there’s no need to joke with the brakes, my sorcerer wasn’t working (the rod sat dead in place), one front wheel was braking (it’s very bad to drive), the car spun during emergency braking. I replaced the sorcerer with a new one + converted it to a 2-circuit brake .system (there is a topic here), awesome ideas. So think carefully.

9 Reply from alexeykamf 2009-05-14 03:00:34

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Re: Without "sorcerer".

When he starts to throw his ass, say, at a speed of 100 km/h, he will think about a lot, he will even have time to remember his whole life.

10 Reply from Kirey 2009-05-15 16:39:19

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Re: Without "sorcerer".

When he starts to throw his ass, say, at a speed of 100 km/h, he will think about a lot, he will even have time to remember his whole life.

This morning, specifically after the above words, I accelerated to 100 km/h and braked sharply. Absolutely nothing was thrown anywhere or thrown away! They just braked all 4 wheels at once (by the way, they braked very well). And there is no need to scare people.

11 Reply from AMX 2009-05-15 16:40:58

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Re: Without "sorcerer".

Are you trying to fool physics?

12 Reply from Kirey 2009-05-15 17:43:54

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Re: Without "sorcerer".

Please close this topic! I did what I wanted, but I didn’t find support.

13 Reply from alexeykamf 2009-05-17 05:42:16

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Re: Without "sorcerer".

First you have to grab the front and then grab the back! Suppose you brake even more or less normally on the asphalt, but in winter you will in any case remember that there is such a thing as a “sorcerer”

14 Reply from Kirey 2009-05-17 07:04:50

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Re: Without "sorcerer".

First you have to grab the front and then grab the back! Suppose you brake even more or less normally on the asphalt, but in winter you will in any case remember that there is such a thing as a “sorcerer”

That's what you should have said right away! I know that. It's not winter now. And we’ll install it by winter (maybe). Friends of mine have driven without it in winter, it’s fine, they say, it just takes habit, and caution, of course.

VAZ 2109: adjusting the brakes yourself is easy and simple

Adjusting the brakes of the VAZ 2109

When the car starts to move away, you often get the feeling that someone is holding it from behind. You need to stop and check the temperature of the rear drum with your hand. If it is heated, therefore, the rear pads jam when braking. Conclusion: it is necessary to adjust the brakes on the VAZ 2109. On a VAZ 2109, adjusting the rear brakes is not difficult. For this reason, repair and inspection work must be carried out to adjust the free play of the brake pedal. Free play adjustment is carried out in the garage. Before starting repairs, you need to check the condition and operation of the rear brake system.

Installation

Set of rear disc brakes for VAZ 2110 As mentioned above, installing rear disc brakes is a delicate matter, but quite doable on your own. This way you can save a lot of money and achieve normal functioning of the brakes.

This is relevant, especially since car services, as mentioned, do not often pay attention to adjustments and the price for services of this kind costs about 10 thousand rubles

Purchasing a set of rear brake discs

Installed rear brake discs

It is recommended to install rear brake discs that are certified by an autonomous non-profit organization. For example, this could be a center that promotes certification or the like. You can purchase rear disc brakes on the market or by ordering online. There is another option, which involves installing rear discs from foreign cars, such as Ford Sierra or Audi A4. But again, when purchasing disks that do not have certification, you will have to make some changes, including sharpening, so that their operation goes smoothly.

Note. Additionally, some rear brake rotor kits do not include boots. In this case, they will have to be purchased separately.

Before starting the replacement process, it is recommended to watch this video. Everything is clearly shown here.

Getting ready for replacement

To get started, you will need the following components:

brake hoses, pads and calipers, which can even be taken from the front brake kit;
a set of brake discs (it is necessary to grind down the parts);
bolts;
washers;
special fastening (faceplate).

Note. You can make a special washer for fixing the brake caliper yourself using a drawing. Although you can order this part on the Internet, as many do.

Replacement process

Begin:

First, let's disassemble the rear brake mechanisms;
dismantle the wheel;
remove the brake drum;
dismantle the pads;
remove the wheel hub by unscrewing four 17mm bolts.

Note. Before unscrewing the bolts, it is recommended to spray them with a special product. In addition, when unscrewing the bolts, you need to act carefully so as not to tear off the edges of the bolts.

Installing disc brakes

unscrew the brake pipe.

Note. And here you will have to work hard, because if the brake cylinder has not been changed for a long time, everything is stuck there.

We plug the end of the unscrewed tube with a piece of hose or a cap from a fitting intended for bleeding (this is done to prevent air from entering the system and loss of fuel fluid);
we knock the hub on the beam out of its seat.

Note. To remove the hub, it is recommended to hit the support disk from the back side, doing this alternately: from above and from below.

Now we put the hub in place, but doing it in a different way than it was before.

Note. In this case, when installing the hub, it will need to be secured through a plate with a built-in brake caliper. The main thing is to make sure that all the holes match exactly

Careful attention must be paid to alignment

straighten the corner of the beam with a hammer (this is done so that the caliper does not rest against the beam);

Photo of disc brakes on a wheel

We put the brake disc on the hub, installing the bracket on the mount.

Note. Don't forget that spacers will need to be placed between the hub and the disc.

install brake pads on VAZ 2110;
We screw the brake hose to the caliper, and then to the tube.

Examination

After carrying out the above operations, you will need to check the entire system. The system is checked for leaks, and to do this you need to press the brake pedal. If the pedal is tight enough, then everything is in order.

Note. It is advisable to have an assistant check the brakes for leaks. You will need to ask him to step on the pedal, and at this time try to turn a component of the wheel. If it doesn't spin, then the brakes are holding properly.

Bleeding the brakes

This is an important operation that will allow you to get rid of the air that still gets into the system. It is worth noting that the brakes on the VAZ 2110 are pumped diagonally, as on other models of the brand. First the right front wheel is pumped, then the rear left, then the front left and rear right.

Examination

VAZ 2109 rear brake adjustment

Raise the rear axle of the car with a jack.
Remove the wheel rims.
Remove the brake drums.
Inspect the brake cylinders for leaks.
Also check their operation, the cylinders should extend to the required distance for braking.
After releasing the pedals, they should not jam. If this flaw is detected, the cylinders must be replaced.
Check the condition of the springs; they should not have any spiral bends. They must also have a flat surface.
Inspect the quality of the pads themselves. There should be no delamination on them, the thickness should be at least 2/3 of the standard.
Also inspect the spacer bar; it should not have any defects, since a damaged bar can interfere with the operation of the pads.
Check the brake drums. There should be no burrs or large grooves on them from the operation of the pads.

Attention. It is necessary to check both sides of the vehicle. After the inspection, replace worn or failed parts if necessary.

VAZ 2109 brake adjustment

To carry out regulation it is necessary:

plate 3 mm thick;
a set of keys;
portable lamp with a protective glass cover, with a protective steel mesh.

The process of adjusting the free play of the brake pedal is carried out to ensure the normal functionality of the entire system. If the stroke is reduced, then the rear pads do not fully return to their position. This causes them and the drums to heat up. Uneven acceleration also occurs at the beginning of movement. With increased free play, pressing the pedal causes the brake pads to incompletely expand.

Pedal adjustment

After the inspection, it is necessary to adjust the brake system:

Raise the hood.
Disconnect the negative terminal from the battery.
Move the front driver's seat from the instrument panel all the way to the rear passenger seats. This must be done for easy access under the steering column.
Hang the prepared lantern in the car to provide sufficient lighting in the area where the adjustment is being made.

Note. Carry out work carefully and consistently.

Press the brake pedal with the palm of your hand. Press without sharp jolts.
With your other free hand, try to install the plate in the space from the pedal bracket to the switch button.

If the plate does not enter or if a larger gap of more than 2 mm is detected, the following actions must be taken:

Hold the pedal with your hand without releasing it.
With your other hand, using a wrench, slightly unscrew the two nuts along the threads. To loosen the brake warning light switch.

Move it carefully to achieve the required space between it and the brake pedal:

Note: The distance should be no more than 5mm.

First tighten one nut, then tighten the second.
Remove your hand from the pedal.
Check the operations performed.
The switch buffer rests against the brake pedal bracket, the adjustment is considered complete.

Handbrake

It is also necessary to adjust the manual parking brake system. If its functionality is incorrect, the brake pads may jam. It should be adjusted after 30,000 km of vehicle operation or at the first signs of poor quality work. To adjust you will need:

garage room with inspection hole,
regular set of keys.

Let's get started:

Engage forward gear.
Place stands under the front wheels for safety.
The rear suspension of the car must be jacked up and supported with reliable supports.

You need to start by checking the lever, which is located inside the car between the two front passenger seats. Raise it two or three clicks. When lifting, one click is made, which means it is tightened. This causes the rear drums to become blocked by the brake pads. If more than 8 are produced, then the cable is weakened and the handbrake does not work:

With the handbrake on, go down into the inspection hole.
Loosen the first lock nut on the equalizer.
Tighten the second nut so that the cable is in a taut position.
If necessary, on the contrary, release it.
Check the operation of the lever. It should respond with two or three clicks.

Then tighten the first nut from the hole, tighten with two wrenches to get the effect of tightening two nuts:

After this, turn off the parking system.
Check the rotation of the rear wheel rims.

Make rotational movements with your hands. Their rotation should take place without a jerk, calmly scrolling along the axis of the car. The sound should come out rustling. Consequently, the adjustment of the vehicle's brake system was carried out successfully. The vehicle is ready for continued operation. The brakes can also be adjusted in a car workshop. You can entrust this work to specialists. But the motorist experiences reliability when this work is done independently. A car can be considered technically serviceable when it is independently inspected and repaired. He will never let you down in difficult, dangerous times. In addition, the price of repairs at service stations can be high. When doing the work yourself, you need to carefully watch the video. You also need to study the photos and, if necessary, take them to the repair site. Place it on a rack or in the back seat of the car. If necessary, review them again. Read the instructions for the operation and the location of the necessary structures. Finish the adjustment and check the work done on a free asphalt area.

The VAZ brake pressure regulator, like any other vehicle, is a device whose functional purpose is to ensure stability, that is, the vehicle’s ability to maintain a given direction and position on the road surface during braking.

The practical implementation of this function occurs as a result of converting the value of the braking force due to the influence of the following factors:

the driver pressing the brake pedal;

degree of vehicle loading;

braking intensity.

What dictated the need to use a pressure regulator? First of all, safety. Even the highest quality tires do not guarantee the absence of slipping of the tread elements relative to the road surface in the longitudinal direction, which, in turn, initiates a decrease in the wheel's resistance to forces directed perpendicular to the vehicle axis. The so-called “skid” arises.

Any braking mechanism, regardless of its design, blocks the wheel to one degree or another.

However, it is quite important in what sequence the blocking occurs and the “skid” it provokes. The least dangerous option is considered to be one in which the front wheel pair locks earlier than the rear wheel pair locks. The use of a brake pressure regulator in the braking system is designed to ensure precisely this sequence of wheel locking

The use of a brake pressure regulator in the braking system is designed to ensure precisely this sequence of wheel locking.

Brake pressure regulator

Attention. If there are problems with the brake system, then the problem may be hidden in the pressure regulator itself.

VAZ 2109 rear brake pressure regulator

In order to regulate it, you need to know the basic principles of operation of this mechanism, popularly called a sorcerer. As a rule, the sorcerer is attached with two bolts from the bottom of the car. As for one of the bolts, it also simultaneously secures the fork element of the drive lever, which is responsible for pressure. This very element or bracket is the very object with which the movement is carried out and thus the pressure can be adjusted.