Malfunctions and replacement of the front brake pads VAZ 2107
Tips for motorists

Malfunctions and replacement of the front brake pads VAZ 2107

The braking system of the car must always be in good technical condition and, first of all, it concerns the brake pads. On the VAZ "seven" they have to be changed rarely, and the main reason for this is the wear of the friction lining. The appearance of problems with the braking mechanisms is indicated by the corresponding signs, which indicate the need for inspection and repair or replacement of the brake elements.

Brake pads VAZ 2107

The basis of the safety of any car is the braking system, in which the brake pads are the main component. We will dwell on the purpose of the pads, their types, malfunctions and replacement in the VAZ "seven" in more detail.

What are they for

Today, almost all cars use the same braking systems based on the friction force. The basis of this system is special friction mechanisms located on each wheel. The rubbing elements in them are brake pads and brake discs or drums. Stopping the car is carried out under the influence of the pads on the drum or disc by means of a hydraulic drive.

What are the

On "Zhiguli" of the seventh model, the brake pads have a structural difference, since there are disc brakes in front and drum brakes in the back.

Front

The front end brakes are fitted with pads with catalog numbers 2101-3501090. The detail has dimensions:

  • length 83,9 mm;
  • height - 60,5 mm;
  • thickness - 15,5 mm.

The front brake elements are installed the same on all classic Zhiguli. The manufacturer and supplier of original front pads for the VAZ conveyor is TIIR OJSC.

Malfunctions and replacement of the front brake pads VAZ 2107
Brake pads "TIIR" are supplied to the assembly line of AvtoVAZ

The design of the front brake mechanism is quite simple and consists of the following elements:

  • brake disk;
  • caliper;
  • two working cylinders;
  • two pads.
Malfunctions and replacement of the front brake pads VAZ 2107
The design of the front brake mechanism VAZ 2107: 1 - guide pin; 2 - block; 3 - cylinder (inner); 4 - clamping spring of the pads; 5 - a tube for the brake mechanism; 6 - support; 7 - fittings; 8 - a tube of working cylinders; 9 - outer cylinder; 10 - disc brake; 11 - casing

The condition of the pads must be periodically monitored so that the thickness of the linings is at least 2 mm. If the friction material is thinner, the pads need to be replaced.

Rear

For drum brakes, pads are used with the article number 2101-3502090 and the following dimensions:

  • diameter - 250 mm;
  • width - 51 mm.

The original product is produced by JSC AvtoVAZ. As in the case of the front, the rear pads fit any classic Zhiguli model.

Malfunctions and replacement of the front brake pads VAZ 2107
Products of JSC "AvtoVAZ" are used as rear original brake elements.

The rear axle braking mechanism has a simple drum design that works to expand. It consists of the following elements:

  • drum;
  • service brake cylinder;
  • pads;
  • parking brake lever.
Malfunctions and replacement of the front brake pads VAZ 2107
The design of the rear brake mechanism VAZ 2107: 1 - handbrake cable; 2 - spacer lever for the parking brake; 3 - rack support cup; 4 - block; 5 - cylinder; 6 - clamping shoe spring (upper); 7 - expanding bar; 8 - tightening spring (bottom)

Which is better

When choosing braking elements, you should not save money. In addition, it should be borne in mind that the design of the "seven" brake mechanism does not have any modern systems that increase the level of safety. Therefore, the products in question should be bought in accordance with the following indicators:

  • the optimal coefficient of friction according to GOST is 0,35–0,45;
  • minimal impact on brake disc wear;
  • large resource of overlays;
  • absence of extraneous sounds during braking.

If we consider the manufacturers of brake pads, then for active driving, preference should be given to ATE, Ferodo. For a more relaxed driving style, when overheating and high loads on the braking system are not expected, you can purchase Allied Nippon, Finwhale, TIIR. When purchasing a brake element, attention should be paid to the composition of which the friction lining is made. If the pad is made using large metal chips, which is noticeable by the characteristic inclusions, the brake disc will wear out much faster, while characteristic depressions will remain on it.

The best option would be those pads that are made from high-tech compounds that exclude the rapid wear of the brake disc.

Malfunctions and replacement of the front brake pads VAZ 2107
Ferodo front brake pads are recommended for active driving.

Brake pad problems

The considered parts of the braking system have to be changed not only when they are worn out, but also in the event of malfunctions that are associated with the use of low-quality consumables or too active driving. The appearance of problems with the pads is indicated by characteristic signs:

  • creak, grinding and other extraneous sounds when braking;
  • skidding of the car when you press the brake pedal;
  • to act on the pedal, you have to make more or less effort than usual;
  • beating on the pedal at the time of braking;
  • after releasing the pedal, it does not return to its original position;
  • the presence of black dust on the rims.

Extraneous sounds

Modern brake pads are equipped with special indicators that indicate the wear of these auto parts. The indicator is a metal strip that is fixed below the friction lining. When most of the material is used up, but the pad is still able to decelerate, a characteristic rattle or whistle appears when the brake pedal is applied. If the pads are not equipped with such indicators, the presence of extraneous sounds indicates obvious wear of the elements in the brake mechanism and the need to replace them.

Malfunctions and replacement of the front brake pads VAZ 2107
The wear of the pads can manifest itself in different ways and one of the signs is extraneous sounds when braking

Drift

If the car skids to one side when braking, then the likely cause is wear on one of the pads. The car can be skidded right up to turning, and even on a dry surface. In addition to the pads, skidding can occur due to the appearance of scoring or deformation of the brake discs.

Video: why the car pulls to the side when braking

Why does it pull, pulls to the side when braking.

Some time ago, I was faced with a situation where the car began to pull to the side when braking. It didn't take long to find the cause of this behavior. After a cursory inspection of the car from below, it was discovered that one of the rear working brake cylinders was leaking. This caused the brake fluid to get on the working surface of the shoe and drum, as a result of which the mechanism was unable to perform its function. The problem was fixed by replacing the cylinder and bleeding the brakes. If you have a similar situation, then I recommend changing the entire cylinder, and not installing a repair kit, since the quality of rubber products today leaves much to be desired.

Increasing or decreasing pedal effort

If you have to press the pedal unusually hard or lightly, then the problem may be caused by abrasion or contamination of the pads. If everything is in order with them, then the integrity of the entire brake system should be checked for fluid leakage.

Vibration

If there is vibration when the brake pedal is pressed, then a possible cause is the ingress of dirt between the brake disc and the pads, or a crack or chips have appeared on the latter. As a result, parts are subject to premature wear. However, you should be aware that a similar phenomenon is also possible in case of malfunctions of the hub or hydraulic cylinders of the brake system.

The pedal sinks

Sometimes it happens that the brake pedal does not move back after pressing. This indicates that the pads are stuck to the disc. This phenomenon can be observed at sub-zero temperatures, when moisture has got on the pads. In addition, it is possible for air to enter the braking system, which requires inspection and subsequent repair or bleeding of the brakes.

Plaque on discs

The deposits on the rims are black dust, which indicates that the pads are worn out. If the dust has metal particles, then not only the pads are erased, but also the brake disc itself. If such a situation arises, it is not worth tightening with the inspection of the brake mechanism, as well as with the replacement of failed parts.

Once I noticed that the front wheels are covered with black dust, and it was not road dust. It is no longer known which brake pads were installed at that time, but after replacing them with factory ones from AvtoVAZ, the situation remained unchanged. Therefore, I have come to the conclusion that the appearance of black dust is normal, indicating natural wear of the pads.

Replacing the front pads on the VAZ 2107

If factory brake pads are installed on the front end of your "seven", then you won't have to worry about replacing them soon. Such elements are nursed for at least 50 thousand km. during normal vehicle operation, i.e. without constant hard braking. If the pads are worn out, then they can be replaced independently without visiting a service station. To carry out repair work, you will need the following tools:

Dismantling

We remove the pads in the following order:

  1. We raise the front of the car with a jack, unscrew the wheel mount and remove it.
    Malfunctions and replacement of the front brake pads VAZ 2107
    To remove the wheel, unscrew the four mounting bolts
  2. Using a screwdriver or pliers, remove the two cotter pins holding the rods of the brake elements.
    Malfunctions and replacement of the front brake pads VAZ 2107
    The rods are held by cotter pins, we take them out
  3. Having pointed a Phillips screwdriver, we push out the rods of the pads. If they are difficult to come out, you can use a penetrating lubricant and lightly tap the screwdriver with a hammer.
    Malfunctions and replacement of the front brake pads VAZ 2107
    Fingers are pushed out with a Phillips screwdriver
  4. We take out the clamps of the pads.
    Malfunctions and replacement of the front brake pads VAZ 2107
    Removing the clamps from the pads
  5. Brake elements often come out of the seats without problems. If difficulties arise, pry them through the holes with a screwdriver, resting on the brake cylinder.
    Malfunctions and replacement of the front brake pads VAZ 2107
    The block comes out of the seat by hand. If this is not the case, pry it with a screwdriver
  6. Remove the pads from the caliper.
    Malfunctions and replacement of the front brake pads VAZ 2107
    Remove the pads from the caliper by hand

Installation

We install new pads in the following order:

  1. We examine the anthers of the working hydraulic cylinders. If the rubber element is damaged, replace it with a new one.
    Malfunctions and replacement of the front brake pads VAZ 2107
    Before assembling the mechanism, inspect the anther for damage
  2. We measure the thickness of the brake disc with a caliper. For accuracy, we do this in several places. The disc must be at least 9 mm thick. If it is not, the part needs to be replaced.
    Malfunctions and replacement of the front brake pads VAZ 2107
    Using a vernier caliper, check the thickness of the brake disc
  3. Open the hood and unscrew the cap of the brake fluid reservoir.
    Malfunctions and replacement of the front brake pads VAZ 2107
    From the expansion tank of the brake system, unscrew the cap
  4. Drain part of the brake fluid with a rubber bulb so that its level is below the maximum mark. We do this so that when the pistons are pressed into the cylinders, the liquid does not flow out of the tank.
  5. Through the metal spacer, we alternately rest the mount against the pistons of the cylinders and press them all the way. If this is not done, then it will not be possible to supply new parts due to the small distance between the brake disc and the piston.
    Malfunctions and replacement of the front brake pads VAZ 2107
    In order for the new pads to fit into place without problems, we press the pistons of the cylinders with a mounting spatula
  6. We mount the pads and other parts in the reverse order.

Video: replacing the front brake pads on the classic Zhiguli

After repairs, it is recommended to step on the brake pedal so that the pads and pistons fall into place.

Identifying the malfunction of the front brake pads on the VAZ 2107 and replacing them is a simple task and does not require special tools and skills. Any owner of this car can cope with it, for which it will be enough to read the step-by-step instructions and follow it during the repair process.

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