Replacing the front brake cylinder
The main malfunction of the front wheel brake cylinders on the VAZ 2110-2112 can be considered their jamming, as a result of which, even when the brake pedal is released, the cylinder does not immediately return to its original position.
Also, problems with the passage of brake fluid from under the rubber are possible, which is also not normal. To replace this part yourself, you will need the following tool:
- 13 mm socket head;
- ratchet handle and knob;
- hexagon or similar bit for 10;
- socket wrench 13;
- special split wrench for brake pipes and hoses.
Main causes of malfunction
The VAZ 2110 caliper is structurally an element that holds the brake pads and is responsible for the degree of their pressure on the brake discs. It is also responsible for uniform wear of the brake pads and guarantees the driver reliable braking in extreme situations.
Thus, the importance of the caliper in the operation of the car is difficult to overestimate
If by this time you have a completely reasonable question, what can happen to the caliper on a VAZ 2110 (2112), we will be happy to answer you. The main cause of malfunctions is “acidification” of the moving elements, coating them with an oxide film, clogging due to the destruction of protective boots or the use of improper lubricant, namely:
- acidification of the main piston mechanism;
- acidification of guides.
Piston mechanism and caliper guides VAZ 2110
A clear sign of problems that the caliper can cause on VAZ cars is uneven wear of the brake pads and an increased braking distance. In this case, the VAZ pads must be changed, and the caliper mechanism itself must be subjected to comprehensive diagnostics:
- check the condition of the piston, its degree of freedom, the presence of moisture, metal oxide, oxide formations and build-ups, the condition of the protective boots;
- Similarly, check the condition of the guides, make sure that there are no uncharacteristic scuffs, abrasions or deformations of the rod on the surface.
We must also not forget about regularly replacing the brake fluid in the system. This should be done approximately every 40 thousand km. mileage of VAZ-2110.
Since brake fluid is hygroscopic, it easily absorbs moisture, thereby oxidizing the piston mechanism and causing it to fail. The piston stroke becomes difficult and uneven wear of the brake pads and wheel wedge occurs.
Procedure for replacing the front brake cylinder on a VAZ 2110-2112
To show the entire repair process more clearly, watch the video I recorded for this topic:
Video instruction
The video was made using the example of a VAZ 2110 car and is equally suitable for both 2111 and 2112. The only way the car parts may differ externally is the brake discs: ventilated or not, as well as their sizes.
Photo report
First of all, we will need to remove the front wheel of the car, after first lifting the car with a jack. After this, using a hexagon, you need to unscrew the two bolts securing the caliper bracket.
Now you can remove the bracket and remove the pads:
Then you can rip off the brake hose with a wrench, but you don’t have to unscrew it completely.
Next, we unscrew two more bolts securing the cylinder to the caliper, having previously bent the two locking plates under them using a screwdriver.
And we move the cylinder to the side, since nothing else holds it.
The hose can now be unscrewed completely by turning the brake cylinder itself several times counterclockwise.
A new front one costs about 500 rubles, so this price is quite acceptable. But the assembled caliper already costs about 2,000 rubles, which is already significant if you suddenly have to change the entire assembly. Installation of this part occurs in the reverse order.
Source
Required Tools
After pumping, carefully check the new cylinder and its connection to the pipe for leaks. To do this, press and hold the brake pedal as hard as possible several times.
- To make your job easier if the new cylinder you purchased breaks, so as not to do the job wrong. You can check the cylinder without a drum, but here you need good physical strength and two mats to compress and hold the pistons.
- When the brakes are adjusted properly, the front wheels engage the pedal first because they are closest to the master cylinder, and then both rear wheels engage simultaneously. If this is not the case, pump out the system or send it back to the service center.
- However, sometimes it is possible to repair the rear brake cylinder; for this purpose, repair kits are sold, which include several o-rings and two injectors. But this is only desirable if its inner surface is in perfect condition.
Repair of brake caliper VAZ 2110
When the piston jams in the brake cylinder, one of the wheels of the VAZ 2110 can turn very difficult. In this case, you need to drive into a pit or overpass and check the main components of the brake system. If, after another check on a pit or lift, you find that brake fluid is leaking from the caliper, then you should take care of it immediately. You have two ways out of this situation: restoring and repairing the brake caliper or replacing it. The brake cylinder may need to be replaced directly.
Finalization
Many, believing that the brakes are bad and repairs do not help them, decide on significant alterations and tuning. For example, tuning the brake system of a VAZ 2110 may include replacing the rear drum mechanisms with disc ones.
It is especially important to know here that braking of the rear wheels should be softer and occur a little later than the front wheels to prevent skidding. Another possible tuning idea is to replace the vacuum booster and the brake master cylinder
Instead of standard ones, they are installed from Lada Priora. This usually helps, first of all, in that vibration is not felt and the pedal works with optimal force.
Another possible tuning idea is to replace the vacuum booster and the brake master cylinder. Instead of standard ones, they are installed from Lada Priora. This usually helps, first of all, in that vibration is not felt and the pedal works with optimal force.
And do not forget - after each intervention in the brakes, they need to be pumped.
Sources
- vazweb.ru/desyatka/tormoza/tormoznaya-sistema.html
- vaz.today/0-5-tormoznaya-sistema-remont-osobennosti
- luxvaz.ru/vaz-2110/45-tormoznaya-sistema.html
How to repair a brake caliper
For repair you will need:
- Jack and wheel wrench.
- A set of keys, a clamp and a couple of screwdrivers.
- Rags and degreaser.
- Repair kit for caliper repair, high-temperature grease for calipers.
- Liter of brake fluid
- New copper washers for brake hoses
- Drill or screwdriver, set of brushes.
First, let's jack up the car and remove the wheel, and then we will need to remove the caliper and disassemble it. Details of the process in the photo.
To remove the caliper, you need to press in the piston, open the lid of the brake fluid reservoir to make the process easier, then insert a large screwdriver between the caliper and the pads, after which you need to pull the screwdriver towards you.
When the pads are released, unscrew the two bolts at the top and bottom of the caliper guides.
Remove the retaining ring from the caliper boot.
Then remove the boot. Since I did it myself at the service center, I had a compressor with which I pressed out the piston.
I advise you to place a rag in the caliper and then carefully, smoothly and slowly press the brake pedal. After the piston came out to clamp the brake hose so that a lot of fluid did not escape, I used a clamp for this purpose.
We unscrew the brake hose from the caliper and carry the caliper in a vice.
We fix the caliper in a vice.
Use a screwdriver to pry the o-ring off the cylinder and remove it.
Since caliper repair is a unit repair, and quality repair of a unit is 70 percent clean, I decided to clean it of dirt. To do this, I took a set of drill brushes and a screwdriver. You can also use brake cleaner.
We clean the caliper carefully, do not under any circumstances clean the working surface of the cylinder!
After cleaning, wash all parts in degreaser and dry.
Next, install a new piston seal.
Lubricate everything with a special lubricant or paste. (Or just brake fluid).
And carefully insert the piston, aligning it with both hands and pressing it in.
Do not hammer the piston with a hammer or anything else. There is a high probability of damaging the seal and all the work will be in vain.
And the boot retaining ring.
We install the caliper in place and bleed the brakes.
For a logical conclusion, I put a rubber ring from the nozzle on the grease fitting so that the threads do not become clogged with dirt.
Source
Main elements of the front brake system
- Brake disc – position 1 in the photo.
- Caliper, pos. 3.
- Brake pads – 4.
- Cylinder – 5.
- Piston – 6.
For the front wheel, the brake mechanism has automatic adjustment of the gap between the disc and pads, with a pad wear indicator and a floating caliper. The bracket includes the front brake cylinder of the VAZ 2110 and the caliper; they are secured to each other with bolts. The piston is installed in the cylinder cavity with an o-ring. The optimal clearance between the brake disc and pads is maintained due to the elasticity of the installed ring. How to change the brake cylinder of a device with your own hands is suggested in the article.
Braking system design
The most important component of the VAZ 2110 brake system circuit is a vacuum booster and a dual-circuit regulator. The latter is responsible for creating pressure in the rear brake devices.
The brake drive is equipped with a piping system, which is divided into two circuits, brake devices and hoses. They allow the front and rear wheels to brake.
To activate the braking system, a special pedal is located inside the passenger compartment at the driver’s feet. In the VAZ 2110 car it is located in the middle. The main elements of the hydraulic drive are:
- Vacuum booster. Its design helps create pressure directed towards the master cylinder piston.
- Pressure regulator drive. Through it, the brake fluid is directed to the rear devices of the braking system.
- Directly the brake pressure regulator of the VAZ 2110. Its function is to be responsible for the pressure force. The unit reduces or increases this indicator, depending on the load on the rear axle of the car.
- Master cylinder with reservoir and pistons. On the filler neck of this tank there is a sensor that monitors the emergency level of brake fluid.
- Front wheel brake mechanism. Its design includes cylinders, pads and a disc, plus a special alarm that warns of wear or malfunction of the lining.
- Rear wheel brake mechanism. Here the system is not disk, but drum. At least, this is the design the factory envisages. Some VAZ 2110 owners believe that drum mechanisms are not reliable and efficient enough, and therefore install disk devices in their place.
