Calipers, brake discs have lines on them, should the brake pads be changed?

If it is a car that has not changed the brake pads, it means that the brake pads need to be replaced. In this case, the grinding lines are relatively shallow. If you have just changed the brake pads, it is normal to have a slight sound of this phenomenon.

Because the old brake pads will wear the brake disc due to various factors such as intersection and texture, it is not necessarily the cause of the brake pads, you can go to the after-sales service for specific checks. The brake disc is divided into a solid brake disc and a ventilated disc according to the structure. A physical brake disc is a metal disc used for braking, and there is no special structure.

There are two types of ventilated discs, namely scribing discs and perforated discs, and the role of both treatment methods is to improve the cooling performance of the brake disc, reduce its thermal attenuation degree, and provide better braking ability. Brake discs are divided into carbon ceramic brake discs and metal brake discs according to different materials, but due to the high manufacturing cost of carbon fiber ceramic brake discs and poor braking power at low temperatures, although they have excellent thermal decay characteristics, they are still not selected by most vehicles. In order to increase the ability to resist thermal degradation, some manufacturers have made the metal brake disc carbon fiber to improve its ability in this regard, and at the same time avoid the problem of poor low-temperature performance of carbon fiber ceramic material.

Advantages of disc brake: 1. The heat dissipation of disc brake is better than that of drum brake, and it will not cause brake recession and brake failure when continuously stepping on the brake.

2. The change in the size of the brake disc after being heated does not increase the stroke of pressing the brake pedal.

3. The disc brake system responds quickly and can do high-frequency braking actions, so it is more in line with the needs of ABS system.

4. Disc brakes do not have the automatic braking effect of drum brakes, so the braking force of the left and right wheels is relatively average.

5. Due to the better drainage of the brake disc, it can reduce the situation of poor brakes caused by water or sediment.

6. Compared with drum brakes, disc brakes have a simple structure and are easy to maintain.

There is no need to change the brake pads if the car brake disc has scratches, and it is normal for the brake disc to have scratches:

1. The brakes have disc brakes, drum brakes and air brakes, and many older cars are front and rear drums. Many cars have disc brakes front and rear. Because the disc brake has better heat dissipation than the drum brake, it is not easy to produce thermal decay in the high-speed braking state, so its high-speed braking effect is good;

2. However, when the low-speed cold brake is used, the braking effect is not as good as the drum brake. **More expensive than drum brakes. Therefore, many middle and high-end cars use full disc brakes, while ordinary cars use front disc and rear drums, while relatively low-speed, and trucks and buses that need large braking power still use drum brakes;

3. The drum brake is sealed, shaped like a drum, and there are many brake pots in China. It turns when driving. There are two curved or semicircular brake shoes fixed on the inside of the drum brake.

When stepping on the brakes, the two brake shoes are stretched outward under the action of the brake wheel cylinder, and the brake shoes are propped up and rubbed against the inner wall of the brake drum to play the role of deceleration or stopping.

Under normal driving conditions, the service life of the brake disc is 60,000 kilometers, so as long as the owner is not driving fiercely, the brake disc or brake pad will generally not appear to a large extent of wear, because the wear limit of the brake disc is 2 mm, and the serious wear of the brake disc will cause the vehicle to shake during braking, so it is recommended that the owner check it regularly and judge whether it needs to be replaced according to the measurement results.

Extended information: How to deal with grooves in the brake disc.

If the groove is deeper, then it needs to be replaced, if the groove does not reach 3 mm, then there is no need for a tube. The brake disc is a wearing part in the braking system that needs to be replaced regularly, and as the mileage of the car increases, the brake disc will continue to wear out, so the brake disc needs to be replaced regularly.

The main components of the brake system include vacuum booster pump, brake master cylinder, brake cylinder, brake pad, brake disc.

Brake pads and discs are both wear parts that need to be replaced regularly, and as the car's mileage increases, both brake pads and discs wear out.

After the brake pads and discs have worn out to a certain extent, they need to be replaced.

After the driver presses the brake pedal, the brake master cylinder pushes the brake cylinder through the brake fluid, at which point the brake cylinder can push the brake pads to clamp the brake disc, so that the car can slow down.

The brake cylinder is what we usually call the brake caliper, and there are many pistons in the brake caliper.

The brake fluid in the braking system needs to be replaced regularly, and the brake fluid is a fluid that absorbs water easily.

If the moisture content of the brake fluid is too high, the braking force will be reduced and the braking distance will be extended.

As soon as the moisture content of the brake fluid reaches 3%, it needs to be replaced immediately.

When changing the brake fluid, it is necessary to empty the air in the braking system line, otherwise it will lead to a decrease in braking force and a prolongation of the braking distance.

The different position of the caliper has a certain impact on the braking torque and stability during braking. If the caliper is in the front half, it will have a force boost effect when braking, and the opposite is true for the rear part.

When measuring the center distance of the circle with the external caliper, the line of the measuring surface of the two clamp feet should be perpendicular to the axis of the circle, and the outer caliper should slide through the outer circle of the circle by its own weight without adding external force, and the opening size of the external caliper is the diameter of the cylinder.

Caliper measurement:

When measuring the center distance of the circle with the external caliper, the line of the measuring surface of the two clamp feet should be perpendicular to the axis of the circle, and the outer caliper should slide through the outer circle of the circle by its own weight without adding external force, and the opening size of the external caliper is the diameter of the cylinder.

When measuring the diameter of the hole with the inner caliper, the line of the measuring surface of the two clamp pins should be perpendicular and intersect on the axis of the inner hole, one plier foot leans against the hole wall during the measurement, and the other plier pin is gradually tested outward by the orifice slightly from the inside.

Hello subject, the calipers of the car are generally in the front, only a few vehicles are in the back, and the rear is generally a more luxurious vehicle. Generally, ordinary vehicles are in front.

<> he has already passed, next time you can ask first, it is better not to ask questions.

The brake pads must be replaced when they are worn to a certain limit, usually the remaining 2-3mm. However, it is not necessary to replace the brake disc when replacing the brake pads.

Brake discs can be replaced on a case-by-case basis, for example, if they wear more than 1mm or 2mm (depending on the model). Brake pads or discs must also be replaced in the event of abnormal wear.

In addition, most cars are equipped with brake pad wear warning lights to remind car owners to replace brake pads in time. Generally, the best thing to replace when the lights are on is not to delay. The brake pads start to wear out very quickly at around 2mm, which is a very dangerous thickness range.

Extended Materials. 1. Service life.

2. Inspection method.

1) Look at the thickness: the thickness of a new brake pad is generally around the right, and the thickness will gradually become thinner with continuous friction in use. When the naked eye observes the thickness of the brake pads, there is only 1 3 thickness left (about 1 3 thickness.

The owner will increase the frequency of self-inspection and be ready to replace it at any time. There are some models that do not have the conditions to be viewed by the naked eye due to the design of the wheels, and the tires need to be removed to complete.

2) Listen to the sound: If the brake is accompanied by the sound of "iron rubbing iron" or shouting (it may also be the effect of the brake pads running in at the beginning of installation), the brake pads must be replaced immediately.

3) By foot feeling: If you feel very hard to step on it, you often need to step on the brake deeper to achieve the previous braking effect, or when you take emergency braking, you will obviously feel that the pedal position is low, then it may be that the brake pads have basically lost friction, and they must be replaced at this time.

First of all, look at the use time of the vehicle, and secondly, touch the texture of the brake disc with your hand to see if there are obvious dents (the surface touch can obviously feel that the surface is uneven) Generally speaking, the brake disc is more durable, check whether the brake pad is seriously worn.

Stronger security.

It turns out that in terms of safety and braking, the braking function of front installation and rear installation is the same. However, different mounting positions can have an impact on body dynamics.

When the car moves forward, the tires roll forward, and the ground gives an upward force.

The brake caliper of the front wheel is in front of the disc, and when braking, in order to prevent the tire from continuing to roll forward, then the brake disc and the caliper combine to generate an upward force. This force is combined with the force of the ground, which will increase the force on the tire bearing during emergency braking, so that the front of the car will also become larger because of the forward tilt of the brake, which is what we often say that the brake nod is strong. It's more likely to cause front flip accidents, but this seems to be less common.

The front wheel caliper is installed behind the disc, and the force generated is downward, which is the opposite of the force of the ground, and after canceling each other, the pressure on the tire bearing will be reduced, and the stability of the vehicle will be improved.

If there is a crack, it needs to be replaced, otherwise the brake disc may break immediately, which is quite dangerous.

The brake disc of a vehicle will not crack in most cases.

If the temperature of the brake disc is particularly high, then the riders must not pour cold water to dissipate the heat, which will affect the crack of the brake disc.

The brake disc of the vehicle can be used for 8 to 100,000 kilometers under normal use.

The braking system of the vehicle is composed of brake discs, brake pads, brake cylinders, brake master cylinders, and vacuum booster pumps.

When the driver presses the brake pedal, the vacuum booster pump will provide assistance, which will help the driver to easily press the brake pedal.

Without a vacuum booster pump, it would be quite difficult for the driver to press the brake pedal.

The front of the vacuum booster pump is the brake master cylinder, after pressing the brake pedal, the brake master cylinder will push the piston of the brake cylinder through the brake oil, so that the sub-piston will push the brake pads to clamp the brake disc.

The brake cylinder is what we usually call the brake caliper.

The braking system of the vehicle needs to be replaced with brake fluid, brake pads and brake discs regularly, otherwise it will basically affect the performance of the braking system.

Brake fluid is a lot of oil that many riders will ignore when maintaining, and brake fluid is quite easy to absorb water.

If the moisture content of the brake fluid is too high, it will affect the braking force to reduce the braking distance and prolong the distance, which will affect the driving safety factor.

It is necessary to change it, because it is a tube brake, if it breaks, there will be no braking force, and a wheel suddenly locks up, which is no different from a puncture. I can rest assured even if I change it.

Normally, the brake disc is not textured, but in the process of use, because there will inevitably be small sand and small stones running into the caliper and brake disc, when you are driving the brake, the brake pad and the brake disc action, it will more or less let the brake disc cause a textured situation, generally speaking, if the texture is not very serious (such as the depression is very deep), basically does not affect the brake

1. Different definitions:

With the front caliper, when the vehicle is moving forward, the brake disc turns forward and joins to make it stop. The caliper bites the brake disc with just the right amount of force. The force at which the brake disc rotates in the opposite direction.

Then obviously, the force of the front caliper is upward. The upward force and the downward force make the front of the car more prone to nodding and pushing when braking.

In the rear caliper, the brake disc wants to move forward, and the rear brake uses the downward opposite force to engage the brake disc. So. The front of the car moves downward, and the caliper also uses downward force, so that the front of the car can be balanced.

In addition, the front and rear of the card is more advantageous than the front in terms of braking effect.

2. Different forces:

Drum brakes have been phased out in favor of better-looking and more efficient disc brakes, which are commonly known as "disc brakes". To put it simply, the piston inside the brake caliper drives the brake pad to squeeze the brake disc, and the principle of friction can make the vehicle slow down and stop.

And in which direction the brake calipers are placed, the easiest reason to think of is naturally the "counterweight". The reason why the word counterweight is put in quotation marks is because in addition to the weight that is simply understood, the counterweight also needs to take into account the deeper counterweight such as dynamic force when arranging the caliper.

3. Different performance:

For performance cars, on the one hand, it is hoped that the weight of the vehicle can be as far as possible to the middle, so the brake caliper layout of most performance cars is "the front wheel is backward, and the rear wheel is forward". However, the caliper may not necessarily be placed in the direction of 3 o'clock or 9 o'clock, and the center of gravity must be shifted when turning when the caliper is arranged, which is the deep "counterweight" just mentioned.

If the front wheel caliper is placed in the rearmost position, it will inevitably bring the greatest shift in the center of gravity, so the front caliper of some vehicles will be slightly up or down, and the lower position can slightly reduce the center of gravity of the vehicle, which naturally becomes the manufacturer's choice.

Brake pads need to be changed once for 3 to 60,000 kilometers. In the braking system of the vehicle, the brake pad can be dismantled is the most important object, and the quality of the brake is determined by the brake pad.