[Catalog:News] [Date:2022-4-20] [Hits:] [Return]

Question 1: how to identify whether the brake pads need to be replaced?

1. Look at the remaining thickness of the brake pad

The brake pad is generally composed of steel plate, adhesive insulation layer and friction block. Generally, the thickness of the new brake pad is about 1.5cm. No matter new or old cars, the brake system should be checked every maintenance. If the new car is more than 30000 kilometers, it is best to check it every 5000-8000 kilometers. If the brake pad is worn more than two-thirds, that is, when the thickness of the brake pad is only 3-4mm, remember to replace it.

2. Listen to warning noise

There will be a raised warning sign at the brake limit position on both sides of the brake pad, which is about 3mm thick. When the brake pad is worn on this sign, it means that the remaining thickness of the brake pad is as thick as it, which may be less than 3mm. At this time, the brake will sound a warning sound and the brake pad must be replaced.

However, this sign is not necessarily reliable. Sometimes there will be abnormal noise when braking. Some car owners say that there is no obvious warning noise when grinding to the limit position, so it is still subject to the manual detection of the remaining brake pad thickness.

3. Pay attention to whether there are brake fault codes on the instrument panel. Pay attention to calculating the mileage every day. After checking every 30000-50000 kilometers, replace the brake pads in advance according to the situation. If the vehicle always deviates when braking, also check whether it is the problem of uneven wear of the brake pads,

Generally speaking, for front wheel drive models, the engine, bearings and drivers add up, the front is heavy, the natural brake load is the largest, and the brake pad wear is the fastest. The rear wheel wear is generally small. Of course, it does not rule out that other special models have greater rear wheel wear.

Question 2: how to check the remaining thickness of brake pads?

At present, the mainstream models in the market are disc brake (disc brake) and drum brake. Disc brake is divided into solid disc, hollow disc, perforated disc and other styles. For drum brake, it is generally necessary to disassemble it to see the brake pads,

Disc brakes are more common. The thickness of brake pads can be seen on the side of some models, some need a flashlight, and some need to remove the tire. Sometimes even if it is seen, the thickness measured by naked eye is not necessarily accurate, but it still needs to be measured by special tools.

Question 3. What are the types of brake pad grade and braking coefficient?

According to the brake pad material and vehicle environment, it is divided into metal brake pads and carbon ceramic brake pads according to different friction materials. Among them, metal brake pads are divided into semi metal brake pads and micro metal brake pads. For vehicle environment such as heavy vehicle, frequent emergency braking and large ramp, micro metal brake pads can be referred to, and ceramic brake pads can be referred to for vehicles with small and light vehicles.

Generally, the brake pad grade and the friction coefficient of the brake pad will be marked on the brake pad. These are the two indicators to judge the brake pad. The greater the friction coefficient, the easier it is to "stick" the brake pad to a certain extent, and the better the braking effect. However, there are deviations in comfort and heat resistance.

The braking grade is generally represented by two letters. The international standard friction grade is FF grade: 0.35-0.45, the European models prefer GG grade: 0.45-0.55, and the semi-metallic brake pads are EF grade. It doesn't mean that the higher the grade, the better. The actual choice also needs to be determined according to the characteristics of their own models.

Question 4. How long is the service life of the brake pad under normal conditions?

Generally speaking, the brake pad is FF grade, and the friction system is 0.35-0.45. Under the environment of non special vehicles, the service life of the brake pad can reach 60000-100000 km. However, most of the factors affecting the brake pad still depend on the daily driving habits. For example, some car owners accelerate and decelerate quickly, often brake hard, the daily road conditions are complex, and the service life of the brake pad may be greatly affected under the environment of steep slopes and need to be replaced in advance.