Automobile brake pad manufacturers tell you how to deal with brake pad noise

Release time:

2019-12-28

What is the cause of the abnormal noise of the car? What are the methods of decision? Let's learn about it with the car brake pad manufacturers!

What is the cause of the abnormal noise from the car? What are the methods of rejection? The following is the followingAutomotive brake pads manufacturersLet's get to know it!

1. Rings

The impact is mainly caused by human and product factors.

Human factors:

1. Remove the original car film and replace it with a new one.

At present, according to the actual situation, the probability of the original car brake pad scratching the original car brake disc is above 50%, but because it is the original car part, and because it is only scratched and does not sound, 90% of repair shops and drivers do not believe that the original car brake disc is damaged, so they often do not take the initiative to check whether there are scratches on the brake disc when replacing the new disc, this often leads to the driver's request for a new piece of repair shop, dealers, manufacturers to compensate for the brake disc. This is obviously caused by human factors.

Treatment: When replacing the brake pads, you must first check the brake disc for scratches. If there are scratches, it is recommended to smooth the scratches or replace the new disc. If the driver does not agree, it should be indicated on the repair order and signed by the driver, which will avoid the driver's claim due to the sound or injury of the disc in the future.

2. The surface of the brake disc is flat but the new disc is installed and it sounds.

A: The first reason may be that the repairman installed the brake pads in a partial way. When removing the brake pads, it can be seen that there are only local friction marks on the surface of the brake pads. Treatment: can be removed and reinstalled. B: The second reason: At present, the size of the friction block of the same type of brake pad is inconsistent among domestic manufacturers, especially the width of the friction block. The size deviation between manufacturers can reach three millimeters. This leads to the brake disc surface although looks smooth, but the size of the large brake pads if installed on the size of the small brake pad friction on the brake disc will also ring. Treatment method: disc first, if not disc can be driven for a period of time, it will not sound after the traces match. C: The third reason is that it makes a sudden noise after driving for a period of time. Most of this is because hard objects on the road, such as sand and stone, iron scraps, etc., happen to be clamped on the brake pads when the brakes are applied. This kind of situation is not only loud, but also easy to hurt the disc. However, when removing the inspection, sometimes the foreign matter has fallen off or worn off. Treatment method: CD, if there is foreign matter on the film, it should be removed before installation. This kind of situation often injures the disc only injures one of the four surfaces of the two discs, which is easy to see. However, if the driver does not explain the reason, it is easy to incur claims. D: It sounds after driving for a while. But not squeaking, but clattering, which may be caused by loose attachments on the brake pads. Treatment: Re-tighten or replace with a new piece.

Product factor: The sound mentioned here refers to the sound when the surface of the brake disc is completely smooth and flat. The reason is that the current state regulations prohibit the use of asbestos-containing brake pads, but large domestic manufacturers generally do, and some small manufacturers are still producing and selling asbestos-containing brake pads. Although semi-metal non-asbestos brake pads have a long mileage, which is beneficial to environmental protection and personal health, the material is hard and the asbestos brake pads are soft. Because the material is soft, it often does not sound even if there are scratches on the brake disc, and the braking feeling is soft. In this case, you can only replace the new piece.

2. injury disc

The damaged disc mentioned here refers to the damaged disc when the surface of the brake disc is smooth and flat. In addition to the foreign matter caught by the brake pads during driving, it is caused by uneven mixing during the manufacturer's production process. In fact, due to cost reasons, the hardness of the brake discs is not as good as before. Even the original brake discs are generally not as hard as before. This makes the semi-metal brake pads particularly easy to damage the discs. As long as it is a slight scratch, that is, the depth of the scratch does not exceed 1mm, there is no need to change the disc, just flatten the disc and continue to use it.

Slagging or falling off of 3. friction block

(1) If the color of the friction block does not change and the slag falls off, it is a product quality problem. Should be replaced with a new piece.

(2) The friction block loses slag or falls off after discoloration. The reasons can be divided into the following types: A. The brake caliper does not return, and the brake caliper does not return for a long time, which will cause the brake pad temperature to be too high and cause the friction material to ablate. Deterioration, or the adhesive fails. In this case, the friction material turns red or yellow, which is not due to product quality, but it must be replaced and repaired. B, long time braking lead to slag or fall off. This kind of situation occurs more often in mountainous areas and more frequently on expressways. Long roads in mountainous areas due to steep slopes. Experienced drivers use point brakes to go downhill, but novices often brake continuously for a long time, which can easily cause the film to ablate, fall off, and remove pieces. The color of this kind of fall off will also turn red or yellow, and then on expressways. Driving, due to good roads and good cars, drivers often drive at speeds exceeding the safe speed of 110 km/h, sometimes even reaching more than 200 km/h. In case of emergency, the point brake often loses its effect and must be braked continuously. This kind of long-term braking often also causes the film to ablate, drop slag and remove blocks. The color of the film will also change to red or yellow. C, the slag and lumps in items A and B above are not product liability and the manufacturer is not responsible.

4. brake failure

(1) The brake of the newly installed film fails, which is often caused by the surface of the film being artificially coated with oil such as oil during installation. This is not a product liability. After removal, the manufacturer that can detect whether there is oil stain will not be responsible, and the driver can only change the new film.

(2) The brake fails after driving for a period of time. This kind of situation mostly occurs when the road surface is flooded, just when stepping on the brake when crossing the puddle, the high-temperature film and the plate will be quenched when exposed to cold water, forming a hard oxidation layer on the surface of the film plate, the surface is hard and the material changes from normal white to blue or blue-red phase color. In this case, the brake pads and brake discs must also be replaced. But it is not a product quality responsibility.

5. Supplementary Notes

(1) When changing the piece, you must first check whether the brake disc is smooth and flat. If it is uneven, the brake disc should be replaced or the brake disc should be flat. If the driver refuses the above suggestion, it must be indicated on the repair order to avoid future claims.

(2) Once the owner reflects the problem, it is good to find the car for inspection at the first time in order to judge the responsibility. For example, there are many situations in the above-mentioned faults that can determine the attribution of responsibility if detected in time, but if not detected in time, it is easy to cause lack of evidence and cause claims.

(3) Under normal circumstances, if the surface of the brake disc is smooth and flat like a new disc. Even hard brake pads within 5000 kilometers will not cause obvious scratches on the surface of the brake disc.

(4) Asbestos-containing brake pads are easily carcinogenic, and the state has banned their use. But there are still non-standard manufacturers in the production and sales. For the health of you and others, please refuse to buy brake pads containing asbestos.

The above is the treatment method of brake pad noise introduced by automobile brake pad manufacturers.

For more information about automobile brake pad manufacturers, please visit official website: http://www.cnzhaoda.com/

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