The vacuum brake amplifier is one of the main working mechanisms of the automotive brake system and is intended for a significant reduction in pressure-to-brake leverage in any type of braking, which entails a higher level of comfort. Its health significantly affects braking efficiency, and, accordingly, on your safety. Therefore, you should regularly check the vacuum brake amplifier for timely detection of faults or violations in operation. About this further in the article.

Device of the vacuum brake amplifier

Vacuum brake amplifier on VAZ 2114 consists of:

1. Rod.
2. The sealing ring of the master cylinder flange.
3. Cups of the enhancer case.
4. Adjusting bolt.
5. Stem seal.
6. Return spring diaphragm.
7. Studs amplifier.
8. Sealing cover.
9. Vacuum amplifier housing.
10. Diaphragms.
11. Cover of the housing of the vacuum amplifier.
12. Piston.
13. Protective Case Case Valve.
14. Air filter.
15. Pusher.
16. Return spring pusher.
17. Valve springs.
18. Valve.
19. Valve housing bushings.
20. Riding buffers.
21. Valve housing.

A - vacuum chamber; In - atmospheric chamber; C, D - Channels.

Signs of malfunction of a vacuum brake amplifier

If you have any doubts about the health of the vacuum amplifier, it should immediately check its condition. The brakes are one of the main systems of any vehicle from which your life and security directly depends, so irresponsibility and negligence are not allowed here.

Symptoms of a vacuum amplifier malfunction indicating its breakdown, the following:

1. The need for applying more than it was earlier, efforts to press brake pedal.
2. The deterioration in the efficiency of braking vehicle during a similar pressure on the pedal.

How to check the brake vacuum amplifier

As soon as any of the factors described above manifests itself, immediately proceed to the diagnosis of the element. To do this, drove the engine and click on the brake pedal several times with sufficient effort. Next, stop it in the center of the amplitude of the movement (fix the pedal foot) and re-turn the power unit.

If the pedal fails a bit, then the vacuum amplifier is working, and if the continued position is saved, then the mechanism has failed. After determining the problem, it should be found out what exactly happened to the vacuum amplifier. To do this, it is necessary to visually inspect. In general, the inspection is carried out at the following points:

1. The vacuum amplifier is checked for the presence of tightness of the connections of the nozzle and the check valve.
2. Next, an inspection of the integrity of the fixing flanges is carried out.
3. In places of bends, the nozzles may crack, which will indicate the wet characteristic traces on their surface.
4. Quite often, the main reason for the release of a vacuum amplifier is due to the damage of the shank - on the seal it is necessary to check the protective cap, which should not be painted. Remove the cap and boot the engine. If you heard hiss after pumping the shank, then the problem is in it.

How to choose a new vacuum brake amplifier, selection criteria

1. Price. The price is one of the most important criteria for choosing a vacuum amplifier. It should not be saved to buy cheap Chinese options, because they will last long. It is desirable to give preference to the medium price categories - not the most expensive, but not the cheapest.
2. Package. The real package used by the authentic manufacturer is made of corrugated cardboard.
   
3. Point of sale. Do not buy goods from market traders. There are a lot of good, tested automotive spare parts stores in any city. Ask to show certificates, documentation for details.
4. Label. The label should be read well - the date of production of the part, the number of the release party and the name of the manufacturer.

Tools, fixtures, consumables

1. Set of keys, end and horn to "10", "17", "13".
2. New vacuum amplifier.
3. Screwdriver.
4. Passatia.

Choosing a workplace

Work on replacing the vacuum brake amplifier is preferably carried out in the garage.

Replacing a vacuum brake amplifier, step-by-step instruction

1. From the brake pedal, disconnect the rod that sticks out of the vacuum amplifier.
   
2. Next, in the engine compartment, we unscrew the brake cylinder from the vacuum amplifier.
   
3. At this stage it is worth noting that many instructions are advised to disconnect all tubes, allegedly complicating the process of dismantling a vacuum brake amplifier. But after such a procedure you need to pump brakes, which is an extra spending time. Therefore, we will bypass without this item and do everything differently.
4. To remove the brake cylinder from the vacuum amplifier, without disconnecting the tube, it is enough just to unscrew one nut on the "ten".
   
5. When the hindrance is eliminated, we turn off the hose that goes to the valve of the vacuum amplifier from the intake manifold.
   
6. Next, we unscrew the fastener bracket from the body, for which it is desirable to have a special handband, as in the photo. The vacuum amplifier itself is attached to the body four turnkey nuts for thirteen.
   
7. When dismantling is made, rearrange the fastening bracket to a new vacuum amplifier, for which 2 nuts should be unscrewed by the key to "17". Assembly perform in the reverse order.
   

Tips Pros: how to extend the performance of the vacuum brake amplifier

A car that is regularly operated requires a certain attention to itself. Over time, even the highest quality and reliable parts are wear out. And since the entire mechanism of the vehicle is a difficult system of interaction as nodes and individual parts, it becomes clear that if one element fails, all the operation of the car is disturbed. Based on all above, it becomes obvious that for the full use of the car, a systematic inspection is required, as well as the correction of the problems. This diagnostics are all the more necessary if certain sounds are called or incorrect control response.