DIY caliper repair VAZ 2109

Repair of the VAZ 2109 caliper may be required if the car is often faced with heavy braking from a speed of more than one hundred kilometers. Brake fluid can simply boil, heating up as the pads rub against the discs. The temperature can reach 600 degrees, the worse it turns out if it has not been replaced for a long time.

For repair, you need to remove the wheel from the car. Then remove the brake hose seal from the bracket on the rack. Next, you need to loosen the tightening of the brake hose tip on the caliper. Using a screwdriver, the tendrils of the lock washers are bent and the two brake caliper mounting bolts are unscrewed.

Then, when repairing the VAZ 2109 caliper, the bolts are removed and the brake caliper assembly with the wheel cylinder is removed. It is necessary to unscrew the brake caliper from the tip, the tip of the brake hose is held with a wrench by the hexagon. It is worth remembering that brake fluid may leak. In addition, the heavily crimped copper ring should be replaced if necessary.

Next, the caliper is clamped in a vice, two bolts with an internal hexagon attaching the brake cylinder to the caliper are unscrewed. Then the wheel brake cylinder is removed from the caliper, the retaining ring is removed. Next, the boot is removed from the brake cylinder, the piston is taken out. Remove the O-ring carefully so as not to damage the brake cylinder mirror.

The brake bleed fitting is also turned out if it is necessary to replace the wheel brake cylinder. If there are signs of damage on the working surface of the piston, then the brake cylinder must be replaced. It is also desirable to replace the cuffs, which are pre-lubricated with fresh brake fluid. Then the lip of the boot is installed in the piston bore.

Further, when repairing a VAZ 2109 caliper, the brake cylinder mirror and the working surface of the piston are lubricated with fresh brake fluid. The piston is inserted into the brake cylinder, the circlip is installed. Now you need to install the caliper in the reverse order.

Welcome!
Caliper - due to it, the car stops, and if we talk in more detail, then in the caliper there is a brake piston and two brake pads due to which braking is carried out when you press the pedal, but sometimes this very piston turns sour or wedges in connection with what to brake the wheel on which the brake caliper with a jammed piston is installed either starts constantly and you cannot do anything about it, or the wheel stops braking altogether and in the end you have only three wheels that stop the car at speed.

Note!
In order to repair the caliper and replace all the faulty parts that are in it, you will need to take with you: The main set of wrenches, a hexagon, as well as a screwdriver, you also need a little new brake fluid and you will also need a vice, since the work will take place with them. much faster and easier!

Summary:

Where is the brake caliper located?
There are only two brake calipers in the car of the ninth family, and they are located only on the front wheels of the car, it will be difficult to see this unit without removing the wheel if, of course, you do not have discs through which the entire brake system of the car is clearly visible, so if you have there are ordinary stamped discs, then you will first need to remove the wheel from the car and only after that you will see the brake caliper in front of you, which is still indicated in the photo below with an arrow for clarity.

When should a caliper be repaired?
In general, in some cases, the caliper needs not only to be repaired, but also to be completely replaced with a new one, but this is only if it was deformed as a result of being hit by something, or even if it is covered with rust that will corrode it over time and as a result of which he and the piston due to which the braking occurs can generally jam.

Well, the caliper itself needs to be repaired if, as already mentioned earlier, the piston is stuck (In this case, the piston needs to be changed and the brake caliper work again), and it also needs to be repaired in case of damage to the bleed fitting (This is treated by replacing the bleed fitting with new), because if it is damaged, then you will no longer be able to bleed the brakes, for example, after replacing the brake fluid, and if you cannot bleed the brakes, then, accordingly, this caliper will not work for you either.

Note!
When the caliper becomes unusable or some of the parts that are inside it fail, then the first thing that will happen is that the car will slow down worse or it will slow down constantly, even though you do not press the brake pedal, so if your the car has such symptoms, then they can be sinned on the caliper itself and the parts that are installed in it!

Disassembly:
1) At the very beginning of the operation, you will need to remove the caliper itself from the car, in order to first check its condition, and secondly, replace all that do not work on it. (For how to remove the caliper, see the article titled: "Replacing the brake caliper with a VAZ")

Note!
Before removing this unit, make sure 100% that exactly it does not work, for this, first just look at its condition, the presence of defects is not allowed, after which you can ask another person (if any) to get into the car and press several times on the brake pedal, and at this time you will have to observe the operation of the very piston that is inside the caliper, it will have to move and, therefore, the brake pads (indicated by green arrows) will have to tightly grip the brake disc indicated by the blue arrows (This is by the way it will be possible to look through the gap in the caliper, which is indicated by a red arrow in the photo below), and when the pedal is released, they must unclench and, as a result, move away from the brake disc without preventing it from rotating!

2) Now, when the caliper is removed, install it together with the bracket that is on it in a vice, in exactly the same way as shown in the photo below, and when the brake caliper is clamped using a hexagon, unscrew the two hex bolts that secure the brake cylinder (Inside this cylinder there is the same piston that was mentioned above), and after the bolts are unscrewed, pulling the cylinder itself, disconnect it from the brake caliper caliper.

3) Then, when the brake cylinder is removed, take it in your hands, and using a screwdriver, remove the retaining ring from it, but only when you remove it, be careful not to tear the protective cover that is on the piston and cylinder (It is still indicated by the arrow), in Otherwise, you will have to replace the cover with a new one.

Note!
When the retaining ring is removed that holds the protective cover, move the screwdriver to the side and use your hands to remove the protective cover from the cylinder!

4) Next, you will need to remove the piston itself from the brake cylinder and if it is deformed or if there is rust on it, then you will have to replace it with a new one, although if there is little rust, the piston can still be polished, about how to do this see the article titled: "The pistons of the brake cylinders are jammed, what to do?" polishing the brake cylinder pistons.

Note!
So what to do if the piston turns out to be rusty, we have already told you, but how to remove this piston from the cylinder was not said a word, and so it is removed very simply, for this you need some kind of special tool inside which will be compressed air and with its help, supplying compressed air through the hole where the brake hose is inserted, remove the piston from the cylinder, for clarity, also look at the video below, but only in the roller it is made more accurate, a stick is inserted there so that the piston does not fly out and does not deform, but also, the supply of compressed air is carried out through the brake hose so that the piston does not fly out abruptly, but it is gradually squeezed out, but in fact, you can not do all this!

5) Next, use a screwdriver again, namely, with the help of it, gently pry and remove the O-ring from the brake cylinder, but when you remove it, try not to damage the mirror part of the cylinder.

Note!
In fact, it is recommended to replace this ring immediately after removing the piston, but still, if you do not have a new O-ring with you, then take a look at the old one and if you do not find any defects on it, for example, such as: Cracks, swelling, loss of elasticity rings, then this sealing ring can not be replaced with a new one!

6) And in conclusion, if you need to remove the bleed nipple and mark it with a new one, then simply unscrew it using a spanner wrench and screw a new one in its place.

Assembly:
The brake caliper itself is assembled in the same way as it is disassembled, but only during assembly you need to know a few details, namely:

1. Before installing the piston into the cylinder, you will first need to install a new O-ring inside the cylinder itself in its place, and before installation, we recommend that you also lubricate it with a little new brake fluid

2. Then take the piston in your hands and you will need to insert it into the inside of the cylinder, but before installing in two stages, install the protective cover, for this, first insert the edge of the protective cover into the groove on the piston itself (see photo 1), and then lubricate it with a new one With brake fluid, the cylinder mirror and the working surface of the piston, sink the piston into the cylinder itself and then put the edge of the protective cover into the groove on the brake cylinder body (see photo 2) and finally put the retaining ring in place so that the protective cover holds.

3. Something else, but this does not concern the caliper, but it concerns the guide pins that hold the caliper bracket, so before you put both guide pins back into place, you need to lubricate them with Uniol-1 grease, or some other nor be like her.

Note!
When the caliper is installed in its place, be sure to bleed the brakes on the car, otherwise the car will slow down very badly, which will lead to an emergency in the future, how to bleed the brake system, see the article entitled: “Bleeding the brakes on VAZ cars”!

Additional video clip:
If you want to see clearly how the brake cylinder is replaced, as well as if you want to hear a couple of practical tips, then watch the video clip below, which shows everything in detail:

To repair or replace the front wheel brake caliper on a VAZ 2108, VAZ 2109, VAZ 21099, do the following:
1. Remove the corresponding wheel from the vehicle.
2. Remove the brake hose seal from the bracket on the rack.

3. Loosen the tightening of the brake hose tip on the caliper.

4. Use a screwdriver to unscrew the tabs of the lock washers and unscrew the two bolts of the brake caliper, holding the guide pins for the hexagons with the second wrench.
5. Remove the bolts and remove the brake caliper assembly with the wheel cylinder.

6. Holding the tip of the brake hose by the hexagon with the wrench, unscrew the brake caliper from the tip. Be careful, brake fluid will come out of the brake hose.Note that the tip has a copper O-ring. Replace the heavily crimped copper ring.

7. Clamp the brake caliper in a vise and remove the two Allen screws securing the brake cylinder to the caliper. Remove the wheel brake cylinder from the caliper.

8. Carefully so as not to tear the boot, remove the retaining ring.

9. Remove the boot from the brake cylinder

10. Using compressed air through the holes for the brake fluid supply, remove the piston from the brake cylinder.

11. Carefully, so as not to damage the mirror of the brake cylinder, remove the rubber O-ring.

12. If it is necessary to replace the wheel brake cylinder or the valve itself, unscrew the brake bleeding union. 13. Carefully inspect the mirror of the brake cylinder and the working surface of the piston. If they show signs of wear, damage or severe corrosion, the brake cylinder and piston must be replaced.
14. Replace damaged, swollen, or loose cuffs. It is recommended to replace the oil seal every time the brake cylinder is disassembled, regardless of its condition.
15. Install a new cuff into the groove of the brake cylinder, having previously lubricated the cuff with fresh brake fluid.

16. Insert the lip of the boot into the piston bore.

17. Lubricate the mirror of the brake cylinder and the working surface of the piston with fresh brake fluid. Insert the piston into the brake cylinder and install the outer edge of the boot into the bore of the cylinder body. Install the retaining ring.

18. Install the caliper with the wheel brake cylinder on the car VAZ 2108, VAZ 2109, VAZ 21099 in the reverse order of removal. Before installing the guide pins, lubricate them with UNIOL-1 grease. Bleed a VAZ 2108, a VAZ 2109, a VAZ 21099 brake system on a car.

The article will discuss how the brake caliper works and how to perform caliper repair do it yourself at home.

When the driver presses the brake pedal, the pads are pressed against the discs and thus the car stops. But unfortunately, they have not yet come up with mechanisms that could retract the brake pads to their original position. They just stop pressing tightly against the discs. Often, after long-term operation, the brake mechanism acquires some malfunctions, which significantly affects the rapid or uneven wear of brake pads and discs, increased noise and an unpleasant odor. The pads overheat and lose their grip at the same time. In short, the vehicle's braking system becomes ineffective.

In fact, there are not so many reasons why such malfunctions are possible. These are either damaged guides along which the caliper moves, or dirt on the working surface that interferes with the free movement of the pads.

Well, or the caliper itself. The last option will be discussed in this material:

-Small amendment: there is still a part in the caliper that contributes to the return movement of the piston after the loss of pressure - this is the cuff. On the one hand, it provides tightness, on the other, it is a kind of spring. Square in cross-section, when the piston moves, it deforms, and then tends to take the form of rest, along the way slightly recessed the piston into the body.

Over time, the elasticity of the cuff is lost, the pads remain pressed against the discs, increased friction, overheating and all other delights. This is not always obvious. How can you troubleshoot?

First of all, the suspended wheel should spin freely, even immediately after pressing and releasing the brake pedal.

Brake discs must not show signs of overheating

outer and inner pads should not have a difference in thickness

brake caliper piston should be easily recessed into the housing.

If there is cause for concern, we start looking for a problem. Most often it occurs due to a damaged anther.

but even if outwardly intact, look under it

the piston surface must be perfectly flat, without any traces of rust or dirt.

VAG provides a repair kit consisting of rubber bands, there are also a bunch of analogues from third-party manufacturers

but there is no piston on sale. However, this is not a problem at all, you can safely use non-original pistons available on the free sale for cars of previous generations.

And now about the repair procedure itself:

-jump the car and unscrew the wheel, turn the steering wheel to the extreme position

-remove the retaining spring

- thoroughly clean the surface near the brake hose mount

- rinse with some kind of cleaner, blow with air

-in order not to lose the brake fluid level, we pinch the brake hose

- unscrew the hollow bolt securing the hose,

- so that the dirt does not get inside, and the liquid does not flood everything around, put a simple bolt with a thread 10 * 1.5 into the hole

-remove the protective caps on the guides

-Unscrew the guides with a 7 mm hexagon.

-it is necessary to slightly drown the piston, for that, using a thick screwdriver, we move the body away from the disk

-remove the caliper, helping ourselves with a screwdriver (screwdrivers)

- one block can remain in the bracket, one is fixed with a spring to the caliper

—stopping support in hand. Remove the cover with a flat screwdriver

- miracles, but even with external well-being, moisture could be inside

-the piston can be removed from the body in three ways:

- without still disconnecting the caliper from the hose, remove it from the disc, and press the brake pedal until the piston falls out. And immediately pinch the hose.

- squeeze the body in a vice, and pull the piston with large "crocodiles", simultaneously making circular movements

- but the easiest way is to remove it with air. However, do not forget to provide support for the safety of your own body parts.

- having drained the remaining brake fluid, remove the old cuff

- it is necessary to thoroughly clean the seating surface of the protective cover

-and also grooves for the cuff

-Before reassembly, it is necessary to flush again (ELSA recommends alcohol, but not inside) and blow with air.

- with clean (!) hands we put a new cuff

-Slightly lubricate it with fresh brake fluid

-a bit t. spill on the piston surface (the same ELSA provides a special paste for this)

- we put the piston in the body strictly vertically, and slightly shaking it, with the effort of our fingers, we press it

-Drowning almost to the middle, put on a protective cover

- making sure that the elastic is not jammed anywhere, press the cover onto the case. A wire ring is welded into it, a special mandrel is provided for an even fit by VAG

-but you can do without it, the main thing is uniform effort

- drown the piston completely, and then push it out with the help of air, and make sure that the boot is flat, not twisted or torn anywhere

- re-sink the piston completely, and you can start assembling. However, since we have come to the repair and maintenance of brakes, everything must be done correctly. So - we unscrew the caliper brackets

-and thoroughly clean all surfaces on which the pads move

-make sure that the thread into which the guides are screwed is not damaged

* weak point on VW of the latest generation. Often, when unscrewing the guide, dirt and rust formed on the protruding part pull out the threads behind them.

-screw the bracket into place (before reuse, clean the bolts and tighten them with a torque of 190Nm ),

put the block on and make sure that it does not get stuck anywhere

-clean the guides from dirt. If there are traces of rust, it is better to replace them altogether.

-insert the inner block into the piston with a spring, put the caliper on the bracket, bait the guides with your fingers (!)

be sure to make sure that the bolt goes along the thread, and only then tighten (30 Nm)

-we put on the caps, so as not to forget later, insert the spring

-the brake hose is attached to brake caliper hollow bolt, and sealed with two rings.

- we can safely call them disposable.

And they are removed only with the help of a tool

-but at the same time it is not possible to find them in ETKA as a separate part. You can safely put rings from a similar assembly used in domestic cars. Unless, before installing, slightly move back and forth on a fine skin

- Before assembly, blow out the fitting

-and clean the mating plane on the hose

-Unscrew the bleed fitting and release the brake hose

- usually, after such work, there is no need to pump the circuit, it is enough to wait until the liquid flows from the fitting, evenly and without bubbles

-for ecology lovers, you can hang a bottle and control the air through a transparent hose

- tighten the shooter (30Nm), get behind the wheel and reduce the pads with a few strokes of the pedal.

-wash off the remaining brake fluid and others and traces of activity

- especially pay attention to the CV joint boot, ball joint and steering tip covers

If these are not observed, we fasten the wheel, lower the jack. Open the hood and check the brake fluid level in the reservoir. Top up if necessary.

Make a test drive. If the pedal fails when pressed for the first time, and after a couple of strokes it becomes higher, repeat the procedure for removing air.

There is also a possibility that due to the different elasticity of the cuffs in the old and worn caliper there will be a difference in the speed of the brakes. Therefore, it is advisable to carry out the bulkhead on both sides at once.

Well, now you can rejoice in the serviceable brakes.
Thus, now you have learned how to execute repair of front and rear brake caliper

The brake caliper is an important element of the braking system, on which the braking performance depends. The caliper presses the brake pad against the brake disc, resulting in braking. Accordingly, the correct operation of the caliper is an important factor in the safe driving of a car.

The VAZ 2109 caliper is a rather complex component; it is a whole braking system. This system includes a brake piston and pads. If it works properly, then when you press the brake pedal, pressure is transferred from the brake line to the pistons. The caliper brings the pads to the disc and, after applying pressure, it compresses them from both sides.

Over time, the caliper wears out and has several problems associated with its breakage. First of all, it is a creak. Squeaking means the presence of friction, which over time destroys the mechanism. Speaking about the reasons for the squeak, we can note the distortions of the pads, as well as worn discs.

In the VAZ - 2109, the brake calipers are located on the front wheels of the car, so you will first need to remove the wheels in order to dismantle the front support VAZ-2109

Sometimes the calipers are not repaired, but require a complete replacement, for example, due to deformation or oxidation. The caliper must be repaired if its malfunction lies in the seizure of the piston. In this case, you can change the piston in order to restore the work of the caliper. It can also be repaired if the fitting is damaged, here the problem of installing a new unit is also solved. The fitting is a very important component, without its proper operation it is impossible to bleed the brakes, that is, the operation of the caliper will be unusable.

If the caliper or adjacent components begin to fail, the driver should notice poor braking or constant braking of the car even without pressing the brake pedal. In this case, you need to immediately diagnose the caliper and resolve the issue of repair or replacement.

First of all, you need to make sure that the caliper is malfunctioning by diagnosing its appearance and by pressing the brake to understand whether the piston in the caliper is working. If you are convinced of the problem that lies precisely in the support, then you can proceed to dismantle it.

As mentioned earlier, first you need to dismantle the wheels, after which you will see the calipers themselves. Next, you need to remove the brake hose from the bracket, taking care that the brake fluid does not spill.After that, it is necessary to dismantle the calipers in order to diagnose their condition. Removal is done by unscrewing two bolts securing the mechanism to the steering knuckle.

After removal, the unit must be installed in a vice and clamped with a hexagon. After that, you need to remove the bolts from the brake cylinder, where the piston is located, and then separate the caliper bracket and the cylinder from each other.

Next, you need to remove the retaining ring from the brake cylinder, while being careful with the protective cover - it can be easily torn. After removing the ring, you need to remove the cylinder from the case. Then it will be necessary to remove the piston from the cylinder. To do this, you need a specially designed device that can supply compressed air to the armhole of the brake hose. When doing this, you must work carefully, as the piston may suddenly fly out.

After removing the piston, you need to inspect it. Here you should notice either deformation or rust on the unit. In the case of the second, if rust is present in small quantities, then it is possible to polish the piston.

Then, using a screwdriver, remove the ring from the cylinder, doing this carefully so as not to damage the cylinder mirror. After removal, it is advisable to replace the O-ring, but if the O-ring is not deformed and is still elastic, then replacement can be avoided.

And finally, the repair of the VAZ 2109 caliper is completed by replacing the bleed fitting, here you need to remove it using a spanner wrench and then tighten the new fitting.

The installation process takes place in the same way as dismantling, taking into account the following details:

• Before you install the piston, you must put the O-ring in the cylinder, which must first be lubricated with brake fluid.
• After that, you must place the piston in the cylinder, after putting on a protective cover. To do this, it is necessary to wedge the edge of the cover into the hole on the piston, then we lubricate the mirror and the piston itself with brake fluid, and then install it in the cylinder. Finally, place the retaining ring in place to secure the cover.

Do not forget to bleed the brakes after reinstalling the caliper, otherwise the brakes will not perform their function well and this can lead to an emergency!

In order to remove the front wheel support on VAZ 2109-2108 cars, we need quite a bit of the tool, namely:

• split wrench for unscrewing brake hoses and pipes
• Head 19
• Ratchet handle
• Collar with extension

Before proceeding with this repair, it is necessary to rip off the front wheel mounting bolts, then raise the car with a jack, and finally unscrew all the bolts, remove the wheel. Next, it is best to immediately unscrew the brake hose. The usual key to do this is not always possible, since they are dragging on conscientiously. Therefore, the ideal option would be a special split, which is clearly shown in the photo below:

To prevent the brake fluid from flowing out of the hose, it is necessary to fix it in such a way that its fitting points up. Then you can proceed directly to unscrewing the mounting bolts of the VAZ 2109-2108 caliper itself. First apply penetrating grease to the threaded connections, rip off the bolts with a knob, which are marked with arrows in the photo:

Then it's best to use a ratchet to do it several times faster:

When the bolts are finally unscrewed, then you can remove the caliper from the brake disc, since nothing else holds it:

You may have to knock a little from the bottom with a hammer (if the pads hold the caliper slightly), but in most cases everything can be removed without it quite well. Installation is carried out in reverse order. If you replaced this complete part, you will then have to bleed the brake system, since the hose was disconnected!

Brake the car with the parking brake of the lada satellite and install stop bars under the rear wheels. Raise and support the front. Remove the wheel.

Rinse and dry the brake mechanism.

If you are going to change the piston or o-ring, disconnect the wheel cylinder from the caliper for convenience.

If there are nicks, traces of wear and corrosion on the working surfaces of the piston and cylinder, they must be replaced.

The guide pins must be free of corrosion and damage. They should move freely in the holes in the base. If not, replace the fingers, as well as the torn or loose protective covers of the guide fingers.

Greetings to everyone on the VAZ Repair website. Today we'll talk about how to paint calipers on a VAZ 2108 at home, that is, with your own hands. In this article, you will see how to properly disassemble the VAZ 2108 caliper, prepare it for painting, and, of course, how to paint the caliper with your own hands.

There are many similar photo reports on the Internet, in which “crazy people” paint calipers directly on the car, that is, without removing or disassembling them. In my case, disassembly is not only a more convenient option, but also a necessity, since it is impossible to install a repair kit without removing the caliper.

1. A set of keys (15, 17, 13, 8 and TORX 15-16);
2. Metal brush (or better a drill with such a nozzle), sandpaper;
3. Solvent, rust converter;
4. Heat-resistant paint (color of your choice);
5. Caliper repair kit for VAZ 2108;
6. Lots of rags and paper and masking tape.

1. We remove the wheel or wheels, then carefully dismantle the calipers. You can take one at a time, but I would recommend filming everything at once, so that later during preparation you will not be distracted. Using the TORX, unscrew the two bolts, then separate the cylinder and the bracket, after which we take out the “fingers”. That's all, the caliper is disassembled.

1. When the calipers are removed and disassembled, you can start cleaning them. We take all the parts and wash them properly and clean them from dirt.

1. Next, we take a metal brush and begin to remove rust and other stubborn dirt. If you have a drill and an appropriate accessory, use it to speed up and facilitate the process. After the main dirt and rust have been knocked down with a drill with a nozzle, we go over the surface with sandpaper.

1. Next, using a rust converter, we process the surface of the calipers.

1. When the surface of the calipers is prepared for painting, it is necessary to degrease everything and glue the places that do not need painting. We use masking tape, pieces of paper or old bags for this.

Further, in most cases, it is recommended to apply a layer of primer, however, given the fact that the primer is not heat-resistant, it was decided not to apply it. There is an opinion that the soil swells and peels off from heating over time, so instead I decided to apply an additional layer of paint, which will act as a primer.

1. Calipers painting. We hang the parts, apply a layer of paint, hold the can at a distance of 20 cm. Make sure that there are no drips and gaps. So alternately apply layer by layer, while allowing each layer to dry properly (+ -30 minutes).

We collect the caliper. We install a repair kit, change fingers, rubber bands, etc. lubricate fingers with copper grease.

The device of the brake system VAZ 2109 front wheels: 1. Brake hose. 2. Bolt of fastening of the guide pin. 3. Pumping valve. 4. Wheel cylinder. 5. Bolt fastening the cylinder to the caliper. 6. Bolts for fastening the base.

Diagram of the VAZ 2109 brake system: 1. Wheel cylinder. 2. Piston. 3. Brake caliper base. 4. Brake disc. 5. Brake pads. 6. Caliper.

Before starting work on replacing brake pads on a VAZ 2109, brake the car with the parking brake and install stop bars under the rear wheels. Raise and support the front of the vehicle and remove the wheels

Through the hole in the VAZ 2109 brake caliper housing, visually check the condition of the pads and remove the rubber seal from the bracket along with the hose

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Use a screwdriver to bend the tendril of the lock washer of the upper bolt of the guide pin and unscrew the upper bolt of the guide pin, while holding it with a wrench for the hexagon

Rotate the caliper body down around the axis of the lower pin and remove the brake pads

Install new brake pads. Make sure that the pressure springs are parallel to the top edge of the brake pads. Turn the body of the bracket and tighten the upper bolt of the guide pin to a torque of 31-38 Nm (3.1- 3.8 kgf

Bend the tab of the lock washer with a screwdriver. Place the wheel and lower the vehicle to the ground. Then press the brake pedal several times to set the brake pistons to the operating position. Check the brake fluid level in the reservoir and top up if necessary. This completes the replacement of the front brake linings of the VAZ 2109.

Unscrew the fastening nut and disconnect the brake hose from the wheel cylinder fitting of the VAZ 2109. Plug the hose hole and bend the antennae of the lock washers of the two guide pin bolts with a screwdriver

Unscrew the lower bolt of the guide pin, while holding it with a wrench for the hexagon and lift the caliper up and unscrew the upper bolt in the same way

Remove the brake caliper VAZ 2109 with a wheel cylinder from the base and clamp the caliper in a vice and unscrew the two bolts with an internal hexagon securing the cylinder to the caliper

Remove the wheel cylinder from the caliper and carefully so as not to tear the protective cover, remove the retaining ring, and then the protective cover - the brake piston boot VAZ 2109

Using compressed air through the brake hose fitting, remove the piston from the cylinder

Carefully so as not to damage the cylinder mirror, remove the O-ring and unscrew the bleed valve if you need to replace the wheel cylinder or the valve itself

To replace the caliper base, remove the two bolts securing it to the steering knuckle. Assembly and installation of the VAZ 2109 brake caliper is carried out in the reverse order. Before assembly, lubricate the O-ring, piston and cylinder bore with fresh brake fluid with brake fluid.

When installing a piston into a cylinder, insert the lip of the protective cap into the groove on the piston, then insert the piston into the cylinder and insert the outer lip into the groove on the cylinder body. Install the retaining ring. Before installation, lubricate the guide pins with UNIOL-1 grease.

To remove the brake discs from the VAZ 2109, set the car on the parking brake, lift and support the front of the car and remove the wheels.

Use a screwdriver to bend the tendrils of the lock washers of the two bolts of the guide pins and unscrew the lower bolt of the guide pin, holding it with a wrench on the hexagon

Remove the caliper with the wheel cylinder from the base and lift the caliper up and unscrew the upper mounting bolt in the same way

Hang the caliper with the wheel cylinder on a wire from the front suspension spring. At the same time, make sure that the brake hose is not twisted and not too tense, then remove the VAZ 2109 brake pads. In this case, mark the pads to install them in their original places

Unscrew the two locating pins and remove the brake disc, Installing the front discs of the VAZ 2109 is performed in the reverse order of removal, before driving, be sure to bleed the brake system by pressing the brake pedal 3-5 times so that the piston of the VAZ 2109 calipers take on a working condition.