Speed vibration when braking. Vibration in the brake pedal when braking

The biggest trouble that may occur in the brake system of the car – is a vibration when braking. In extreme situations the car can just do not stop at the right moment, and it will crash. Professionals attribute this to the fact that in an emergency situation the driver is scared of the wobbling in the steering wheel and pedals and weaken the pressing force on the brake. Worse these problems can only be completely non-functional brake system. There are several basic reasons of such behavior of the car – identified problems should be immediately addressed. Depends on the road safety.

How to identify vibration?

Often knocks the brake pedal and the steering wheel – it is as if in the process of stopping interfered with the anti-lock system. To identify vibration when braking on dry and smooth surface. It is best to test the car for vibrations on the pavement. Then ABS, if she got in the car, will not interfere with the process. You need to accelerate to 80 km/h, and then sharply, however, without locking the wheels, to begin reducing the speed. If there is a characteristic vibration when braking, then you should think about repairing.

Causes of vibration on the brake pedal

This unpleasant phenomenon may occur for several reasons. In most cases, professionals say brake discs, brake drums. Less often (but also should not be excluded) in highways of brake system, found the air. Sometimes the reason is badly worn tires, wheels with impaired balance. Curves of the wheel – it is also the vibrations on the steering wheel when braking. Rarely problems occur with the work of the anti-lock system, but this fault is easily diagnosed using the ECU of the car. Among the reasons will not be considered worn components.

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Corrosion of the brake pads

The Car is made of metal, but the metal is susceptible to corrosion. Even if the car is kept in a warm garage, it is not necessary to think that it does not rust. If the car is stood for a long time, in the places where the pads touch the disks, there is corrosion. In this case, when the first attempts to produce inhibition clearly felt a vibration in the brake pedal when braking. Sometimes this effect goes by itself. But most often the disc and pads must be changed.

Poor quality pads

In addition to corrosion, they can be just of poor quality. Today to get on the marriage simple. And if the discs were not in very good condition, then a working layer on the pad will wear unevenly. Some pads of the friction pad crumbles whole chunks. Vibration on the steering wheel when braking occurs as a result of the loose fitting pads to the disk.

Changing the geometry of the brake disc

This is another reason that causes vibrations on the brake pedal and on the steering wheel. It consists in sudden cooling of the disk. When the driver has aggressive driving and dynamically moving from one traffic light to another, the wheels simply do not have time to cool. But overheating may occur and at quiet driving because of the caliper, which can provide between the pads and the disk has enough clearance. If a car drives into a puddle, the brake disc is cooled abruptly and breaks or deforms. After such deformation it is similar to a Bicycle wheel with “eight”. The problem is that visually these variances on the disk can not be seen. If the latter is poor, then overheating it is affected very adversely. Deformation it is provided, and therefore, vibration of the pedal when braking just inevitable.

Deformation in the drum brake

Drum brakes are practically not subject to deformation, but sometimes they can be trouble. They, as well as disc and may overheat (but to a much lesser extent). Overheating happens when in a hurry the driver forgets to remove the car from the hand brake and you go down far enough. The driver may not notice that the car almost rides. When you stop, the hammer remains raised, or the hand brake twitches again. From school physics course known that when heated, the metal tends to expand. When cooled – narrows. In the case of drum brake pads will not allow the drum to come to my normal state. In the end, the geometry is modified and takes the form of an ellipse. Hence, the vibration in the brake pedal when braking. To ensure the safety of the brake system of the car, there are two parallel or diagonal contour. Drum brakes can now be found only on the rear axle of budget cars. However, if a specific automobile engineers have created a parallel circuit, then will be felt the beats on the pedal. If it is diagonal, then there is a steering vibration when braking. To identify a bent or damaged drum can of the brilliance of the work area. It will be mixed.

Brake cylinders

The Rear and the front cylinder may not work properly. Often, these brake components are just sour, and then fail. This raises the vibration of the pedal when braking. To solve this problem is very simple –it is sufficient to spray the mechanisms with WD-40 or similar lubricant (similar to produce “Manna”). But most often helps just to replace.

The Hub as the cause of vibration when braking

This is a very rare cause, but to exclude it is not worth it. Often, the hub is deformed only in a crash or extremely hard impacts. However, when hit in the pit by the car likely will come off the wheel or there is vibration on the steering wheel, just when moving. No harm will check the wheel bearing. If there is wear, then it is the main reason for appearance of wobbling. For the diagnosis should poddomkratit the car (the wheel) and check the backlash it is to sway from side to side. Backlash should be minimal, and speed - without the sounds and the buzz.

Serviceable brake system and runout in the pedal

If the braking system is fully functional, and vibration under braking is still there and thus not possible to detect defective items, then the problems are hidden in less obvious places. In such situations, experts advise to check the wheel balancing. The fact that the imbalance on the wheel is acting centrifugal force. She is the cause of all problems. An experienced driver will easily define neutralisieren wheel. But in this case vibration will not only pedal, but also around the body. You should also check the front suspension. Vibration on brake pedal when braking can be a sign of deformed suspension arms, or the unreliability mounts.

It is Recommended to carefully check the reliability of fastening of the body, suspension and brake system. The specialists from STO often find loose bolts on the whole car. Especially this problem is relevant, if the car is frequently driven on roads of poor quality.

Brake caliper

Another infrequent reason for the vibration when braking – uneven force on the caliper. As a result of its jammed. But the problem to identify yourself is very difficult – you must visit a specialized service.

Vibration when braking at speeds

When the car is driving at high speed, brake parts prone to heat. It is possible that the disc and caliper very hot, stuck and as a result, the speed when braking, vibration, or even strong shaking.

Dangerous beats: loose wheel

This lagostina problem. To diagnose it too easy. It is for this reason often have different vibes and beats. May loose one or even all four wheels. What would be easiest for no reason, it is very dangerous. If the problem is not detected in time, the consequences can be dire not only for the driver or his passengers, but also for other traffic participants. Repair in this case, namely – if you do not notice the beats at the right time can be very expensive. Broken hub, deformations of the wheels, the deformation of brake discs and broken mounting holes on the drive. If under braking there is a vibration, better to make sure that all bolts are tightened securely. But to pull until it squeaks too should not.

What else is the cause of the wobbling and vibrations?

These causes are rare, but still they need to consider. Sometimes there are minor problems in the steering rack or too worn out ball joints suspension of the vehicle. Vibration and run-out will occur due to worn shock absorbers. But in this case the effect will be felt in the moment of turning. Also, runout in the brake system and the steering wheel can be caused by strong blows of the car.

Can I ignore the problem?

If there is vibration when braking (VAZ-2170 - is no exception), then it is better without delay to visit the STO. But at a certain time to close this eye problem – some go so in the course of the year. However, if the reason lies in the weak tightening the nuts on the wheel, it is very dangerous. Such beats in the braking system have a significant load on other parts in the chassis. In addition, vibration at speed, as already mentioned, can cause an accident – it is very easy to lose control of the car. Driving a car is dangerous by itself, but if appear these symptoms, it is better to find and eliminate the cause. It is not necessary to endanger yourself and your passengers. Keep the car in good condition – protect yourself and your loved ones.