About brake oil

Brake oil is generally also called brake fluid. Its function is to dissipate heat, prevent corrosion and rust, lubricate and transfer energy. In daily use, all parts of the car will be lost, and the brake oil is no exception. Therefore, after using for a certain period of time, the brake oil needs to be replaced. How often should the brake oil be replaced? Under what circumstances should the brake oil be replaced?

Brake oil is also called brake fluid, because now our brakes are hydraulic. Hydraulic pressure must have liquid, and brake oil is this kind of liquid. If the brake oil is not changed for a long time, because the brake oil is a high concentration liquid and has strong adsorption to the water in the air, the brake performance of the vehicle will be affected when the brake oil adsorbs the water. When we step on the brake, the brake pad and brake disc will produce high temperature, and the temperature of the brake cylinder will increase accordingly. Because the water does not have high temperature resistance and compressibility, Water vapor will be generated when encountering high temperature. If the brake oil is not changed for a long time, more and more water will be absorbed in the air. Therefore, abnormal phenomena will occur when braking, and even brake failure will occur.

How often? 40000 kilometers or two years! In fact, how long does the brake oil change? Like car maintenance, there is a fixed time limit. One is that when the mileage reaches 40000 km, it should be replaced. At the same time, if more than two years, it is also necessary to replace the brake oil. Whichever comes first is the standard. Of course, there are occasional situations. During specific driving, you should always observe whether the brake oil alarm indicator flashes and whether the performance of the alarm sensor is good. When the brake oil is insufficient, you should add it in time, and the stored brake oil should be kept between the calibrated minimum capacity scale and the maximum capacity scale.

If the brake oil is not changed when it is due, the brake can stop. That's because the intensity of braking is not strong at ordinary times, driving is not fierce, there is no repeated emergency braking, and there is no long-term braking on long downhill sections. Therefore, I think there is no problem with braking. After the brake oil fails, it is not that there is no brake, but that the brake limit is reduced. Originally, the brake still has good braking performance after stepping on the brake for 10 minutes. Now, the braking performance may be reduced after stepping on the brake for 2 minutes. The original braking distance was 40 meters, but now it may be 42 meters, which is the consequence of brake oil failure.

The second is: in normal driving, if the speed exceeds 80km / h, take emergency braking measures immediately. The owner obviously felt that the braking distance was longer than before. If the factors of brake pad and brake disc are excluded, there can only be a problem with the brake, which also needs to be checked or replaced. The braking system is extremely important and should not be sloppy at all.

The third situation is that when you step on the brake, you will feel light and heavy, which is very difficult to control. In particular, when you brake gently, you basically can't feel that the speed has decreased, and when you step on the brake deeply, you don't feel very down-to-earth and very unstable. The repairman suggested that this situation shows that the water content in the brake oil may have exceeded 2.5%, and the water content is too high. Frequent stepping on the brake will turn the water in the brake oil into steam due to the high temperature, and a large number of bubbles will remain in the brake oil, which will lead to unstable braking and difficult to control. In this case, it is also necessary to replace the brake oil in time.

Therefore, no matter how we feel these subtle changes, and combined with the mileage of the car, when it comes to the life cycle of the brake oil, we can change it as soon as possible. After all, the brake is a very important safety system, and there is no need to worry about waste and delay. After all, there is only one life.