Repair of brake system of cars VAZ-2109

All articles about the device and repair of units and elements of the brake system of cars VAZ-2108 and VAZ-2109 Sputnik.

The structure and operation of the braking system
According to its purpose and functions, the vehicle braking system is divided into service, spare, parking and emergency. The service braking system reduces the vehicle's speed...

Vacuum brake booster device
The vacuum booster reduces the amount of force required for braking on the brake pedal, thereby making the car easier to control. It is attached with two studs to the adapter...

Brake master cylinder
Master cylinder of hydraulic brake drive assembled with reservoir 13 (figure 79) is secured to the vacuum booster studs with nuts. In the cavity of the main cylinder, two pistons...

Brake pressure regulator
Pressure regulator 1 (figure 81) changes the pressure in the rear brake drive depending on the load on the rear suspension of the vehicle. As the load increases, it does not...

Front wheel brake mechanism
The front wheel brake mechanism is disc, with a movable caliper. It fits well into the wheel, has a small number of parts, including seals, and a small mass. Since heat transfer...

Rear wheel brake mechanism
The rear wheel brake mechanism is a drum type, with automatic adjustment of the gap between the shoes and the drum. It is mounted on the support shield 11 (figure 85), fixed on...

Parking brake system
The rear wheel brake mechanisms have not only a hydraulic but also a mechanical manual drive, which includes: lever 10 ( see figure 85 ), two cables 10 (figure 87), equalizer 6,...

Brake maintenance
After the first 2000 km, and then every 15,000 km, check: tightness of the system, condition of hoses and tubes; fluid level in the tank (top up if necessary); efficiency of the...

Checking pipelines and connections
To prevent sudden failure of the brake system, check the condition of all pipelines: metal pipelines must not have nicks, scratches, abrasions, active corrosion centers and must...

Checking the condition and replacing the front wheel brake pads
Place the car on a level horizontal surface, apply the parking brake and remove the wheel. Through window A (figure 88) visually inspect the condition of the brake pads. If the...

Adjusting the parking brake
If the parking brake does not hold the vehicle on a 25% slope when the lever is moved 4-5 teeth of the ratchet device, adjust it in the following order: raise the parking brake...

Adjusting the brake pedal free travel
The free travel of the brake pedal with the engine not running should be 3...5 mm. The adjustment is carried out by moving the switch 10 (figure 89) brake light with nuts 8 and 9...

Checking the performance of the pressure regulator
Place the vehicle on a lift or inspection pit, clean the pressure regulator and its drive parts from dirt. Visually inspect to ensure that the pressure regulator and its drive...

Checking the performance of the vacuum booster
Press the brake pedal 5-6 times with the engine off to create a vacuum in cavities A and B ( see figure 78 ) the same pressure, close to atmospheric. At the same time, by the...

Checking the condition and replacing the brake pads of the rear wheels
To check the brake pads, place the car on an inspection pit, overpass or level ground, place chocks under the wheels and perform the following operations: release the parking...

Bleeding the brake hydraulic system
Bleeding the brake hydraulic drive is necessary to remove air, which significantly reduces the efficiency of the service brake system. Air can get into the hydraulic drive due to...

Replacing brake fluid
To prevent air from entering the hydraulic drive system and to spend a minimum amount of time on this operation, you must adhere to the following rules: proceed in the same order...

Main faults of the brake system and ways to eliminate them
The safety of the vehicle's movement largely depends on the technical condition and performance of the brake system. Therefore, it is very important to quickly identify and...

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More articles from other manuals on VAZ cars:
➠ Chassis: Brake system VAZ-2115 (1997-2012)
➠ Chassis: Brake system VAZ-2101 (1970-1983)
➠ Chassis: Brake system VAZ-2104 (1984-2012)
➠ Chassis: Brake system VAZ-2107 (1982-2012)
➠ Chassis: Brake system VAZ-1111 (1988-1996)

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