The importance of car braking system needless to say, owners should be very clear, once there is a problem to deal with it is more troublesome. The braking system generally includes the brake pedal, brake booster, brake alarm light, handbrake, brake disc, as long as there is any problem should be enough attention. Take brake pads, although it is not necessary to replace too often, but in the replacement of time must pay attention to mileage or cycle, if too long not replaced, it will largely affect its performance. So, how many kilometers of brake pads to change once, must change the original factory?
Brake pad replacement is closely related to mileage, but the two are not positively related. That is to say, there are other factors that affect the replacement cycle of brake pads, such as the driving habits of owners, the car environment and so on. For the vast majority of ordinary owners, brake pads can generally be replaced once in about 25,000-30,000 kilometers, if the driving habits are better, usually few feet on the brakes, and driving road conditions are also good, only used as a commute, you can properly extend the replacement cycle of brake pads. In fact, owners can also determine whether the brake pads need to be replaced by the following methods.
First, you can check the thickness of the car brake pads. The thickness of the new brake pads is about 15 mm, and the brake pads will become thinner and thinner due to wear and tear after long-term use. If it is found that the thickness of the brake pads is only about one-third of the original, that is, about 5 mm, then you can consider replacing the brake pads.
Secondly, you can also feel the wear degree of the brake pads by stepping on the brakes. If the normal control of the brake announcement is similar to the sizzle of the conflict between the iron sheet and the iron sheet, it can be explained that the brake pad has been worn quite seriously, and it needs to be replaced as soon as possible, otherwise it is likely to form a brake failure. Of course, this method is related to directly looking at the thickness of the brake pads is still a certain difficulty, because there are more other noises when the car is driving, such as wind noise, tire noise, these noises are likely to cover up the sound of the brake pads when stepping on the brake. In addition, about some old drivers with rich driving experience, you can also judge the degree of wear of the brake pads by stepping on the brake foot, the brake is more laborious, the brake interval is significantly longer, which can also clarify the brake pad needs to be replaced in time.
Is it necessary to choose the original brake pads to replace them? This is not necessarily, the most important thing is to look at the quality and performance of the brake pads, just satisfied with these two points are OK. Secondly, when replacing brake pads, pay attention to its conflict coefficient, too high simple to form a wheel lock, too low simple to brake, to choose a moderate conflict coefficient. Of course, but also consider the comfort of brake pads, such as some brake pads step down the noise is larger, and even smoke, odor, dust and other conditions, such brake pads are obviously unqualified, should be replaced as soon as possible.
Brake pad wear speed is different due to a common phenomenon, under normal conditions, the two front wheels of a car brake pad wear speed should be common, the two rear wheels wear speed should be common. And most of the front wheels wear faster than the rear wheels, about twice to change the front brake pads to change the rear brake pads, which is due to the vehicle's center of gravity forward when braking. Check the brake pad wear condition sometimes found that one side of the wear to the limit, the other side is very thick, how is this?
Most of the reasons are caused by the poor return of the brake pump. When not stepping on the brake, the gap between the brake pad and the brake disc is very small, and the two are close together, so that the brake can respond quickly. When the brake is stepped on, the piston of the brake pump moves outward to apply force to the brake pad, and the two brake pads will clamp the brake disc, and the disc conflicts with each other. When the brake is released, because there is no braking force, the piston of the brake branch pump moves back, and the brake pad quickly recovers to the initial condition. However, if a certain side of the brake pump piston return is poor, even if the brake is loosened, the piston still does not go back or go back slowly, the brake pads will be subjected to additional wear, and the brake pads on this side will wear faster. I have encountered a few car pump piston in a stuck situation, one side of the wheel has been in a light braking situation.
In addition to the piston stuck, if the guide pin of the pump is not smooth, it will also lead to poor return. The branch pump can move around the need for a slide, sliding is the guide pin, it is moving on the guide pin, if the guide pin rubber sleeve breaks, into a lot of dust dirt, conflict resistance greatly increased. Maybe the brake pad was changed improperly and the guide pin was bent. The two conditions of the moving speed of the pump will also be blocked, and the brake pads will also wear fast.
The above is the most common two reasons for the brake pad manufacturers, here the speed is different is a very different situation, such as one side of the ground, the other side there is half or one-third. If the difference is not normal, the wear degree of brake pads on both sides of all cars will not be completely the same, there will be different. Because of the usual different road conditions when the brake pads are subjected to different forces, such as turning while braking, the center of gravity of the car will be offset to a certain side, the brake force on both sides of the wheel will be different, so the brake pad wear can not be completely the same, can only say roughly the same.
Brake sub-pump return bad driving can feel? When braking, it can be felt, and there will be deviation in braking, because the left and right braking force difference will be relatively large. If you are completely stuck in the brake situation, you can also feel the start and acceleration, and you will feel the car is particularly heavy, like pulling the handbrake. Some will also hear the squeaky clash, and the hub on this side will also be abnormally hot. In short, the car will feel abnormal significantly, it is necessary to check in time at this moment, the brake deviation is still more dangerous, the driver simply can not control the direction, especially when the speed is fast.
Post time: Aug-14-2024