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You should pay attention to these when replacing the brake pads!
Measure with a brake pad measuring ruler. The thickness of the new brake pad is generally 1cm. If the brake pad is less than 3mm, it should be replaced. Usually you can see the general situation of the brake pads through the gap of the wheel hub with a flashlight. If the thickness of the outer brake pads of the caliper is less than 5mm, you need to remove the tires to check the brake pads on the inner side of the cylinder.
Precautions when selecting brake pads and replacing brake pads:
When choosing brake pads, you must look at the friction coefficient of the brake pads. The friction coefficient represents the performance index in the constant speed friction test. The friction coefficient of the brake pads of ordinary household cars is between 0.35-0.55. The larger the coefficient, the better the braking effect. The coefficient of friction is marked on the brake pad packaging.
Attention should be paid when replacing:
1. The depth of the friction groove on the edge of the brake disc. If the depth is large, the brake pads need to be polished and the chamfer is polished to prevent abnormal noise.
2. When the brake pad is installed, the friction material should be in contact with the brake disc. If it is installed backwards, the back plate will contact the brake disc. There will be no brake or abnormal brake noise when installed.
3. The new brake pads with screws and accessories must be replaced with new ones, because there is thread glue on the new screws to prevent the screws from loosening.
4. After the brake pads are replaced, you should step on the brakes several times. After stepping on hard, check the brake oil level. Only when the oil level is normal can you start driving. And when driving, you must step on a few more brakes, so that the brake pads and brake discs are fully run-in, and the braking effect is the best.
The hazards of the brake pads not being replaced in time:
1. Abnormal sound of the brakes, there is a low and loud rubbing sound when you step on the brakes, which is very harsh. This is the friction between the brake disc and the back plate, causing damage to the brake disc.
2. This is very serious, the brakes fail, and there is a dangerous situation without brakes.
Measure with a brake pad measuring ruler. The thickness of the new brake pad is generally 1cm. If the brake pad is less than 3mm, it should be replaced. Usually you can see the general situation of the brake pads through the gap of the wheel hub with a flashlight. If the thickness of the outer brake pads of the caliper is less than 5mm, you need to remove the tires to check the brake pads on the inner side of the cylinder.
Precautions when selecting brake pads and replacing brake pads:
When choosing brake pads, you must look at the friction coefficient of the brake pads. The friction coefficient represents the performance index in the constant speed friction test. The friction coefficient of the brake pads of ordinary household cars is between 0.35-0.55. The larger the coefficient, the better the braking effect. The coefficient of friction is marked on the brake pad packaging.
Attention should be paid when replacing:
1. The depth of the friction groove on the edge of the brake disc. If the depth is large, the brake pads need to be polished and the chamfer is polished to prevent abnormal noise.
2. When the brake pad is installed, the friction material should be in contact with the brake disc. If it is installed backwards, the back plate will contact the brake disc. There will be no brake or abnormal brake noise when installed.
3. The new brake pads with screws and accessories must be replaced with new ones, because there is thread glue on the new screws to prevent the screws from loosening.
4. After the brake pads are replaced, you should step on the brakes several times. After stepping on hard, check the brake oil level. Only when the oil level is normal can you start driving. And when driving, you must step on a few more brakes, so that the brake pads and brake discs are fully run-in, and the braking effect is the best.
The hazards of the brake pads not being replaced in time:
1. Abnormal sound of the brakes, there is a low and loud rubbing sound when you step on the brakes, which is very harsh. This is the friction between the brake disc and the back plate, causing damage to the brake disc.
2. This is very serious, the brakes fail, and there is a dangerous situation without brakes.
Most of the products are sold to more than 20 countries and regions such as North America and Europe
Most of the products are sold to more than 20 countries and regions such as North America and Europe
2020-10-22
The newly installed brake pads make abnormal noise, are they not installed properly?
The abnormal noise of Xinhuan’s brakes is caused by several factors. First of all, the first aspect is that the brake pads of the vehicle are not chamfered when they are installed. According to the structure of the brake pads, the brake pads are not structured. The surface looks flat, but in actual use, due to process and other issues, a right angle will be formed. When installing, the right angle around the side is not rounded, so it is still a right angle. This right angle will come into contact with the plate and produce abnormal noise.
The second aspect is caused by the fact that the brake is not installed with a silent pad. For the general brake pad, a silent pad is wrapped around it. This silent pad can prevent the brake cylinder from directly contacting the brake pad when it is working. Direct contact will cause the sound of collision, and this is also a factor that causes abnormal noise of newly replaced brake pads.
Summary: As a new brake, the abnormal noise is basically related to the later operation. When installing, you should pay attention to the chamfer. For the newly replaced brake pad, install muffler or muffler paste. You can avoid these situations when you travel.
The abnormal noise of Xinhuan’s brakes is caused by several factors. First of all, the first aspect is that the brake pads of the vehicle are not chamfered when they are installed. According to the structure of the brake pads, the brake pads are not structured. The surface looks flat, but in actual use, due to process and other issues, a right angle will be formed. When installing, the right angle around the side is not rounded, so it is still a right angle. This right angle will come into contact with the plate and produce abnormal noise.
The second aspect is caused by the fact that the brake is not installed with a silent pad. For the general brake pad, a silent pad is wrapped around it. This silent pad can prevent the brake cylinder from directly contacting the brake pad when it is working. Direct contact will cause the sound of collision, and this is also a factor that causes abnormal noise of newly replaced brake pads.
Summary: As a new brake, the abnormal noise is basically related to the later operation. When installing, you should pay attention to the chamfer. For the newly replaced brake pad, install muffler or muffler paste. You can avoid these situations when you travel.
How to judge that the car brake pads need to be replaced?
If you hear such a sound when you step on the brakes, it is the harsh sound of the interior metal rubbing, and every time you step on the brakes, it will be accompanied by this sound, and this sound sounds like only metal rubbing in the car. Pure sound, it appears when you step on the brake, and there is no when you don't step on it. When you stop outside the car, the sound is sharper, just like the sound of metal scraping against the brake disc, then it means that the brake pads need to be replaced. Some cars think that this situation should be more like the sound of the brake disc being rubbed back and forth between the brake disc and the brake caliper after only a small part of the brake pad has been worn?
Although it is indeed a figure of a metal sheet rubbing against the brake disc, it is not a figure that appears when the brake pad is about to wear out. In fact, the designer deliberately designed this phenomenon when designing. A metal friction strip is inserted at the place where the brake pads are replaced. This metal friction strip is usually useless, and it is basically covered by the brake pads. When the wear of the brake pads reaches the maximum, the brake pads The metal friction strip can no longer be covered, and the friction strip will follow. Therefore, when the brake pads should be replaced, the brake discs will rub against this friction strip, and a sharp sound will be generated to remind the car owner that the brake pads should be replaced.
Some people think that if such a loud noise occurs, the friction strip will not cause great damage to the brake disc? Will the brake disc be damaged by such friction over time? In fact, it will not cause such a result. The metal friction strip has been specially treated, and the brake disc will only have a sharp and louder sound when rubbing against it, but the brake disc will not suffer any wear, and the owner can rest assured. The use of metal friction strips is also a very useful tool for automobiles.
This sharp sound is also deliberately designed by the designer, because some bold car owners do not want to replace the friction plate even if the friction plate is almost worn out and will continue to drive. With this metal friction strip, even if you want to continue to drive, I can’t continue driving, because the shorter the brake pads are, the louder the friction sound will be. If you continue to drive, not only will you be affected, people outside the car can also hear this sound, and no one wants to continue driving. If you want to eliminate this sound, you can only replace a new brake pad.
If you hear such a sound when you step on the brakes, it is the harsh sound of the interior metal rubbing, and every time you step on the brakes, it will be accompanied by this sound, and this sound sounds like only metal rubbing in the car. Pure sound, it appears when you step on the brake, and there is no when you don't step on it. When you stop outside the car, the sound is sharper, just like the sound of metal scraping against the brake disc, then it means that the brake pads need to be replaced. Some cars think that this situation should be more like the sound of the brake disc being rubbed back and forth between the brake disc and the brake caliper after only a small part of the brake pad has been worn?
Although it is indeed a figure of a metal sheet rubbing against the brake disc, it is not a figure that appears when the brake pad is about to wear out. In fact, the designer deliberately designed this phenomenon when designing. A metal friction strip is inserted at the place where the brake pads are replaced. This metal friction strip is usually useless, and it is basically covered by the brake pads. When the wear of the brake pads reaches the maximum, the brake pads The metal friction strip can no longer be covered, and the friction strip will follow. Therefore, when the brake pads should be replaced, the brake discs will rub against this friction strip, and a sharp sound will be generated to remind the car owner that the brake pads should be replaced.
Some people think that if such a loud noise occurs, the friction strip will not cause great damage to the brake disc? Will the brake disc be damaged by such friction over time? In fact, it will not cause such a result. The metal friction strip has been specially treated, and the brake disc will only have a sharp and louder sound when rubbing against it, but the brake disc will not suffer any wear, and the owner can rest assured. The use of metal friction strips is also a very useful tool for automobiles.
This sharp sound is also deliberately designed by the designer, because some bold car owners do not want to replace the friction plate even if the friction plate is almost worn out and will continue to drive. With this metal friction strip, even if you want to continue to drive, I can’t continue driving, because the shorter the brake pads are, the louder the friction sound will be. If you continue to drive, not only will you be affected, people outside the car can also hear this sound, and no one wants to continue driving. If you want to eliminate this sound, you can only replace a new brake pad.
When will the brake pads be replaced?
2020-05-26
We all know that the brake pads of a car cannot be used for a lifetime. Both brake fluid and brake pads need to be maintained and replaced. Most of the brake pads gradually become invalid after 40,000 kilometers. However, in accordance with the actual situation, premature replacement will bring about There are extra costs and unnecessary expenses, but if you encounter these four situations, don't delay.
1. There is noise when the vehicle stops or just starts
It is very common for a car to make noise when braking. It often occurs when the car starts or stops. This means that the dirt of the brake pads and the wear of the brake pads are uneven. If there is only noise, the braking performance will not be affected. It can be restored by simple cleaning and use. If you hear loud squeaks and metal scratches, it means that the brake pads have worn out seriously. At this time, you should change the brake pads first.
2. The brake pedal will become soft when braking.
If the brake pedal is softer than usual when braking, it is often due to insufficient brake pressure. This situation is very dangerous. It is necessary to step on the brake pedal harder to stop the car. The braking also takes longer and longer distance. The reason for this situation is generally due to air leakage in the calipers, brake cylinders and other locations.
3. The steering wheel shakes when braking
First, make it clear that the steering wheel shakes abnormally during braking. The brake pedal shake may trigger the ABS system. The two need to be identified. The steering wheel shake during braking is actually a common phenomenon, especially in cars that are 5 years old or more than 50,000 kilometers. , The brake disc is abnormal and unevenly worn, which has a great influence on the braking performance at high speed. It can be solved simply by replacing the brake disc.
4. The vehicle deviates when braking
When the brake pipe is damaged or the oil supply is uneven, if you feel the brake pad and brake pedal are difficult to return, it may be due to brake fluid contamination or installation and adjustment problems of the brake system. If this happens, it is very dangerous. Please try to avoid sudden braking. , Stop slowly and ask for help at the first time.
With the development of science and technology, when the brake system fails, more and more cars display warning lights on the dashboard, but most cars do not have such a function, and most of the accidents are still due to "speeding". And the "brake" is two major causes. If you find the above four conditions, don't drag it anymore.
We all know that the brake pads of a car cannot be used for a lifetime. Both brake fluid and brake pads need to be maintained and replaced. Most of the brake pads gradually become invalid after 40,000 kilometers. However, in accordance with the actual situation, premature replacement will bring about There are extra costs and unnecessary expenses, but if you encounter these four situations, don't delay.
1. There is noise when the vehicle stops or just starts
It is very common for a car to make noise when braking. It often occurs when the car starts or stops. This means that the dirt of the brake pads and the wear of the brake pads are uneven. If there is only noise, the braking performance will not be affected. It can be restored by simple cleaning and use. If you hear loud squeaks and metal scratches, it means that the brake pads have worn out seriously. At this time, you should change the brake pads first.
2. The brake pedal will become soft when braking.
If the brake pedal is softer than usual when braking, it is often due to insufficient brake pressure. This situation is very dangerous. It is necessary to step on the brake pedal harder to stop the car. The braking also takes longer and longer distance. The reason for this situation is generally due to air leakage in the calipers, brake cylinders and other locations.
3. The steering wheel shakes when braking
First, make it clear that the steering wheel shakes abnormally during braking. The brake pedal shake may trigger the ABS system. The two need to be identified. The steering wheel shake during braking is actually a common phenomenon, especially in cars that are 5 years old or more than 50,000 kilometers. , The brake disc is abnormal and unevenly worn, which has a great influence on the braking performance at high speed. It can be solved simply by replacing the brake disc.
4. The vehicle deviates when braking
When the brake pipe is damaged or the oil supply is uneven, if you feel the brake pad and brake pedal are difficult to return, it may be due to brake fluid contamination or installation and adjustment problems of the brake system. If this happens, it is very dangerous. Please try to avoid sudden braking. , Stop slowly and ask for help at the first time.
With the development of science and technology, when the brake system fails, more and more cars display warning lights on the dashboard, but most cars do not have such a function, and most of the accidents are still due to "speeding". And the "brake" is two major causes. If you find the above four conditions, don't drag it anymore.
What should we pay attention to when choosing car brake pads?
Then when we choose car brake pads, what factors should we pay attention to? This article will take you to understand.
1. Friction coefficient
The friction coefficient is not as large as possible, but it cannot be too small. It directly affects the braking force effect of the brake pads. Starting in 2018, the country has also formulated the disc brake pad implementation standard (GB5763-2018), and it is a mandatory implementation standard. . Only those that meet this standard are considered qualified brake pads. Therefore, when purchasing brake pads, you must pay attention to whether there is such an implementation standard on the product packaging.
Brake pads with too high friction coefficient are generally used in racing cars with intense driving behavior. Because these racing cars have very high braking requirements for the vehicle during the competition, intense driving is very frequent, and the temperature of the brake pads, calipers, and brake discs will rise very quickly when driving at high speeds and frequently braking.
High performance car brake pads
Generally speaking, the friction coefficient of the original brake pads is between 0.35-0.4, such as the friction coefficient of high-performance (Velocette) brake pads is between 0.4-0.5, and the friction coefficient of competitive brake pads is above 0.5.
2. High temperature resistance
High temperature resistance, also known as thermal decay (heat decay temperature is about 450°~600°). When the car is driving at high speed, the temperature of the brake pads and brake discs will increase when the driver steps on the brakes to generate braking force; as the temperature increases, the friction performance of the car brake pads will decrease, which is called thermal attenuation.
If the friction performance is drastically reduced, then the braking effectiveness of the brake is not obvious. The current national standards have made very clear regulations on the friction coefficient of brake pads at room temperature and high temperature. Under normal circumstances, the thermal attenuation of the original car's brake pads begins to attenuate significantly at 300°); the thermal attenuation temperature of high-performance brake pads is about 450°~600°; the thermal attenuation temperature of competitive brake pads is 750°~1000° about.
3. Wear resistance
If the friction coefficient of the brake pad is ideal, the thermal attenuation is also good, but after several times of use, the thickness of the normal 1.5cm piece is reduced to less than 1.0, which is poor wear resistance and short service life. The wear resistance of brake pads has a lot to do with the material, production formula and manufacturing process of the brake pads. At present, the most ideal and cost-effective brake pads on the market are mostly ceramic brake pads formulated with composite ceramic materials. The original brake pads are mostly made of less metal and more metal formulations.
Fourth, the degree of adaptation
If your brake pads are all excellent in performance, the coefficient of friction is also high. However, after being installed on the car, brake jitter, abnormal noise and other phenomena occurred. At this time, you need to check whether the brake pads, brake discs, and brake calipers match, so you must pay attention to buying special brake pads for your car before buying.
Then when we choose car brake pads, what factors should we pay attention to? This article will take you to understand.
1. Friction coefficient
The friction coefficient is not as large as possible, but it cannot be too small. It directly affects the braking force effect of the brake pads. Starting in 2018, the country has also formulated the disc brake pad implementation standard (GB5763-2018), and it is a mandatory implementation standard. . Only those that meet this standard are considered qualified brake pads. Therefore, when purchasing brake pads, you must pay attention to whether there is such an implementation standard on the product packaging.
Brake pads with too high friction coefficient are generally used in racing cars with intense driving behavior. Because these racing cars have very high braking requirements for the vehicle during the competition, intense driving is very frequent, and the temperature of the brake pads, calipers, and brake discs will rise very quickly when driving at high speeds and frequently braking.
High performance car brake pads
Generally speaking, the friction coefficient of the original brake pads is between 0.35-0.4, such as the friction coefficient of high-performance (Velocette) brake pads is between 0.4-0.5, and the friction coefficient of competitive brake pads is above 0.5.
2. High temperature resistance
High temperature resistance, also known as thermal decay (heat decay temperature is about 450°~600°). When the car is driving at high speed, the temperature of the brake pads and brake discs will increase when the driver steps on the brakes to generate braking force; as the temperature increases, the friction performance of the car brake pads will decrease, which is called thermal attenuation.
If the friction performance is drastically reduced, then the braking effectiveness of the brake is not obvious. The current national standards have made very clear regulations on the friction coefficient of brake pads at room temperature and high temperature. Under normal circumstances, the thermal attenuation of the original car's brake pads begins to attenuate significantly at 300°); the thermal attenuation temperature of high-performance brake pads is about 450°~600°; the thermal attenuation temperature of competitive brake pads is 750°~1000° about.
3. Wear resistance
If the friction coefficient of the brake pad is ideal, the thermal attenuation is also good, but after several times of use, the thickness of the normal 1.5cm piece is reduced to less than 1.0, which is poor wear resistance and short service life. The wear resistance of brake pads has a lot to do with the material, production formula and manufacturing process of the brake pads. At present, the most ideal and cost-effective brake pads on the market are mostly ceramic brake pads formulated with composite ceramic materials. The original brake pads are mostly made of less metal and more metal formulations.
Fourth, the degree of adaptation
If your brake pads are all excellent in performance, the coefficient of friction is also high. However, after being installed on the car, brake jitter, abnormal noise and other phenomena occurred. At this time, you need to check whether the brake pads, brake discs, and brake calipers match, so you must pay attention to buying special brake pads for your car before buying.
Brake fluid must be replaced?
2020-05-18
When the brake pads clamp the brake disc, friction will occur, and the moment of friction will generate heat energy to be transferred to the brake fluid. Because the temperature of the gas is too high, the temperature will consume the braking force and cause the power to drop and the pedal driving process. This is why we There will be a long distance when stepping on the brakes.
Even if the performance of the brake fluid is good, it must match our vehicle model. Because the condition of the brake fluid cannot change due to the height of the temperature, the brake fluid is extremely important. It is explained in the Harvard Business School, automotive, aftermarket, and public service platforms. . Haval Power HP3, Haval Quiet, these two brake fluids have very good conversion performance for braking boiling point, and its water content reaches 3.5%, so the real quality brake fluids are 3.5%.
When the brake pads clamp the brake disc, friction will occur, and the moment of friction will generate heat energy to be transferred to the brake fluid. Because the temperature of the gas is too high, the temperature will consume the braking force and cause the power to drop and the pedal driving process. This is why we There will be a long distance when stepping on the brakes.
Even if the performance of the brake fluid is good, it must match our vehicle model. Because the condition of the brake fluid cannot change due to the height of the temperature, the brake fluid is extremely important. It is explained in the Harvard Business School, automotive, aftermarket, and public service platforms. . Haval Power HP3, Haval Quiet, these two brake fluids have very good conversion performance for braking boiling point, and its water content reaches 3.5%, so the real quality brake fluids are 3.5%.
How many kilometers does a family car run to replace the brake pads?
Let’s not talk about trailers that transport goods. After all, the brake system of this type of vehicle needs to be replaced frequently, and there is no fixed standard in terms of cycle, so let’s just talk about ordinary family vehicles. How many kilometers or how long has it been used before the brake system needs to be overhauled and replaced! In general, the repair shop will tell us that the brake pads need to be replaced after the vehicle has run for 30,000 to 40,000 kilometers, but in fact, this data is not correct! First of all, repair shops also need to make money. Under normal circumstances, when our car has ran for 30,000 to 40,000 kilometers, the brake pads are still 80% new! After replacement in the repair shop, the brake pads will be resold by the repair shop for second-hand. Therefore, under normal circumstances, when we replace the brake pads, we must first check the thickness of the brake pads. The thickness of the brand new brake pads is 1.5cm, which is equivalent to the thickness of the belly of the thumb, and when the overall thickness of the brake pads is less than or equal to 0.5cm, which is 1/3 the thickness of the thumb, it must be replaced!
There is actually no exact time rule for how often to check the brake pads. After all, there is still a difference between using a car frequently and using a car occasionally, but if it is only used for commuting to and from get off work, it is only necessary to check the brake system once every six months. It's okay. Of course, if abnormal noise occurs when the brakes are lightly tapped, we also need to check the brake system. Although it is not ruled out that the new brake pads are in the running-in period, we cannot rule out that the brake pads have appeared on both sides. The situation of friction brake disc. At this time, it is not only necessary to replace the brake pads, but also to conduct a comprehensive inspection of the brake discs. Most of the time when the brakes are abnormal, the brake discs are damaged to a certain degree! Therefore, it is necessary to replace the brake pads and check the brake discs.
I don’t know if all car owners, when checking the brake system, have they ever encountered a reminder from a repair shop that the brake fluid is dirty and needs to be replaced. In fact, whether or not the brake fluid is dirty will not affect the overall use of the brake system! What we mainly look at is whether there is air in the brake fluid. If there is air in the brake fluid, it will cause the vehicle to drag the brakes and accelerate the wear time of the brake pads. In addition, it will also cause the temperature of the wheel hub to be too high, the carbonization of the brake pads or the direct locking of the wheel hub. Because there is air in the brake fluid, there are often many undesirable phenomena such as insensitivity of the brake and edge grabbing of the brake, which may cause traffic accidents!
Let’s not talk about trailers that transport goods. After all, the brake system of this type of vehicle needs to be replaced frequently, and there is no fixed standard in terms of cycle, so let’s just talk about ordinary family vehicles. How many kilometers or how long has it been used before the brake system needs to be overhauled and replaced! In general, the repair shop will tell us that the brake pads need to be replaced after the vehicle has run for 30,000 to 40,000 kilometers, but in fact, this data is not correct! First of all, repair shops also need to make money. Under normal circumstances, when our car has ran for 30,000 to 40,000 kilometers, the brake pads are still 80% new! After replacement in the repair shop, the brake pads will be resold by the repair shop for second-hand. Therefore, under normal circumstances, when we replace the brake pads, we must first check the thickness of the brake pads. The thickness of the brand new brake pads is 1.5cm, which is equivalent to the thickness of the belly of the thumb, and when the overall thickness of the brake pads is less than or equal to 0.5cm, which is 1/3 the thickness of the thumb, it must be replaced!
There is actually no exact time rule for how often to check the brake pads. After all, there is still a difference between using a car frequently and using a car occasionally, but if it is only used for commuting to and from get off work, it is only necessary to check the brake system once every six months. It's okay. Of course, if abnormal noise occurs when the brakes are lightly tapped, we also need to check the brake system. Although it is not ruled out that the new brake pads are in the running-in period, we cannot rule out that the brake pads have appeared on both sides. The situation of friction brake disc. At this time, it is not only necessary to replace the brake pads, but also to conduct a comprehensive inspection of the brake discs. Most of the time when the brakes are abnormal, the brake discs are damaged to a certain degree! Therefore, it is necessary to replace the brake pads and check the brake discs.
I don’t know if all car owners, when checking the brake system, have they ever encountered a reminder from a repair shop that the brake fluid is dirty and needs to be replaced. In fact, whether or not the brake fluid is dirty will not affect the overall use of the brake system! What we mainly look at is whether there is air in the brake fluid. If there is air in the brake fluid, it will cause the vehicle to drag the brakes and accelerate the wear time of the brake pads. In addition, it will also cause the temperature of the wheel hub to be too high, the carbonization of the brake pads or the direct locking of the wheel hub. Because there is air in the brake fluid, there are often many undesirable phenomena such as insensitivity of the brake and edge grabbing of the brake, which may cause traffic accidents!
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