Why does the brake ring when lightly pressed, but not when pressed again

Time:2023-10-12 20:40

Low-speed cars, light brake ringing, heavy but not ringing, this situation is very complex, not only will occur in the new car on the new, will also occur in the old car, both in the newly changed brake pads, will also occur in the use of a period of time on the brake pads. For this phenomenon, there is no comprehensive and accurate answer, today we will talk about some practical cases. Whether it is effective according to the disease, we can observe and research in practice.

The abnormal sound when lightly stepping on the brake is mainly the friction sound between the brake disc and the brake disc. When you lightly place your foot on the brake pedal, the brake disc will always be in a state of slight contact with the brake disc, resulting in an increase in the friction temperature between the disc and the disc, making the material surface of the brake disc carbonized to form a harder substance, resulting in abnormal noise during slight friction.

The solution:

Take the brake sheet down and sand it with sandpaper, and remove the carbonized material on the surface of the brake sheet.

The new brake pads produce abnormal sound, mainly because the edge of the brake disc may be "stepped" or the brake disc is worn, the surface is uneven, the brake pad and the brake disc are in local contact when friction, resulting in abnormal sound.

Solution: Check the brake disc before installation, if the brake disc is uneven or there are steps on the edge, replace the new brake disc or perform optical disc processing and then install the brake pads, if you can not replace or optical disc, you can chamfer the brake pads and then install, which will also effectively reduce the abnormal sound generated by the brake. If the disc surface is uneven, the abnormal sound is generally run in about 1000 kilometers, and the brake pad and brake disc are completely run in, the abnormal sound will disappear.

On the problem of abnormal brake sound, a sharp squeak is emitted when braking, this kind of sound is not a fault, mainly related to the material of the brake pad. You'll have to remove the brake pads and polish them a few times before the noise goes away. All vehicles will have this problem, this abnormal sound will not affect the normal use of the brake system, you can not do any processing, please rest assured to use.


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