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As the most serious wear parts, the new brake pads need to pay attention to these three points

First, when changing the brake pads, we must pay attention to grinding their corners. Generally, brake pads are reserved for a diagonal plane, commonly known as “chamfer”. In addition to this “chamfer”, it is also necessary to polish the edge position of the entire friction surface, which is actually a noise matching process. Because the old brake pads and brake discs have passed tens of thousands of kilometers of “lingering”, they have formed a certain complementary shape between each other.

That is to say, the old brake pads have carved a notch of their own on the brake disc. Although the naked eye is not easy to distinguish, but after the brake pad is changed, there will be a certain friction noise. Because they don’t match. It’s like wearing shoes a size too small

So, by sanding the corners, so that the new brake pads can be completely stuck in the brake disc groove left before, there will be no noise, but also ensure that the brake force is sufficient.

So the question is, will the grooves in the brake disc be getting deeper and deeper? Of course, in general, the depth of more than 2mm, it is time to replace the brake disc.

Second, after changing the brake pads, try not to brake with big feet, let alone brake sharply. Because the friction surface of the new brake pads is not completely compatible with the surface of the brake disc.

The size of the fitting area directly determines the effect of the brake. Because the old brake pads left their own marks on the brake disc, it is bumpy when viewed with a microscope, so the new brake pads are replaced, we must first adapt to these marks, and slowly the contact area will become larger.

Third, after replacing the new brake pads, we must pay attention to running-in, so that the brake pads and the brake disc as soon as possible to achieve a better fit to ensure the braking effect.

In general, after the new brake pads are replaced, it is necessary to fully run in at least 500km to allow the new brake pads to enter the best working condition. Before this, the speed should be properly controlled, and the road condition should be predicted at the high speed to prevent sudden braking and affect the braking force. In rain and snow weather, we should pay more attention to grasp the brake advance and maintain the distance.

After replacing the new brake pads, a slight abnormal sound during the braking process is a normal phenomenon, if it disappears after running in, then it does not need to be concerned. However, if the abnormal sound is obvious and lasts a long time, you need to go to the quick repair shop to check whether the edge is wearing and producing noise.

In general, replace the brake pads more than 3 times, you need to replace a new brake disc. Of course, in the process of using the car, every time you replace the brake pads, you should check the wear depth of the brake disc. If it reaches 2mm, it should be replaced in time.

How do you measure this depth? Use a caliper to measure the height of the edge of the lower brake disc. Because the edge position is not in contact with the brake pads, it has not endured friction. If the bump at the edge reaches a height of 2mm, then the brake disc should be replaced.

Finally, when replacing the new brake pads, you can let the master help check whether the return of the brake pump is good. If for some reason, the brake sub-pump, that is, the return of the hydraulic piston is not normal, it will seriously wear the brake pads and brake discs. There’s gonna be a lot of damage

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