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Method 1: See Thickness The thickness of a new brake pad is generally about 1.5cm. As the thickness of the brake pads gradually decreases during use, the thickness gradually decreases. Professional technicians suggest that when the naked eye observes that the thickness of the brake pads is only about 1/3 of the original thickness (about 0.5cm), the owner will increase the frequency of self-test and be ready to change. Of course, due to the wheel design, individual models do not have the conditions to be viewed by the naked eye and need to be removed to complete the tire.
Each brake pad has a raised sign on both sides. The thickness of this mark is about two or three millimeters, which is also the limit of the thinnest replacement of the brake disc. If the thickness of the brake pad is already parallel to this mark, it must be replaced. Therefore, when the brake pad thickness close to this mark, the owner must always observe the preparation, but it is difficult to accurately observe through the naked eye without disassembling the tire. At present, there are many models in the instrument brake light position when the brake pad is too thin It is suggested that relative self-checking is more convenient.
Tips: Brake pads are not subject to a strict replacement interval according to the environment of the car and driving habits. In general, replacement should be considered when driving about 60,000 kilometers. When the naked eye observes that the brake pads are thin, they should be required to be inspected by the technicians during maintenance. Because visual observations are inherently inaccurate, professional maintenance stations use calipers to be more rigorous than the naked eye.
Method 2: Listen to the sound If the brake is lightly accompanied by the sound of "iron iron" (it may also be the effect of running-in when the brake pad is first installed), the brake pad must be replaced immediately. Because the limit signs on both sides of the brake pad have directly rubbed the brake disc, it proved that the brake pad has exceeded the limit. In this case, when the brake pads are replaced, they must be checked with the brake discs. When this kind of sound occurs, the brake discs are often damaged. At this time, even if a new brake pad is replaced, the sound cannot be eliminated. If the brake pad is severe, the brake disc must be replaced. .
In addition, there are some hard spots in the brake pad with poor quality. This will also produce abnormal noise. In general, the abnormal sound produced by this will wear out after a period of time.
Tip: When you hear the sound of a brake, it is often too late. At this time, the brake disc will be damaged more or less. The price of the brake discs is much higher than that of the brake pads. Therefore, it is recommended that you check the brake pads frequently to avoid damage to the brake pads.
Method 3: Feeling of Strength If the brakes are very hard, it is possible that the brake pads have basically lost friction. This must be replaced at this time, otherwise serious accidents will occur.
Tip: This method is relatively abstract, and it may be somewhat difficult to grasp by feeling. Therefore, it is very important to develop a good habit of self-check. In addition, the reduction of the braking effect will lead to an increase in the consumption of brake oil. Therefore, when replacing the brake pads, the inspection of the brake fluid should be emphasized.