The sensitivity of the car's braking system is closely related to the life safety of each passenger, and it is also critical to evaluate whether a car is good or bad, running fast on the one hand, and whether the brakes can be braked in time. Functional devices, controls, transmissions and brakes constitute the entire braking system, and their normal operation is inseparable from brake oil, also known as brake fluid.
If gasoline is the blood of the engine, then the blood of the braking system is the brake oil. In hydraulic braking systems, brake oil is used as a liquid medium to power them. Although the liquid cannot be compressed, it is extremely fluid, and when the pressure is received, the pressure will be transmitted evenly and quickly from the main pump to the individual sub-pumps, which is the principle of hydraulic braking.
Many old drivers will say, then I have driven for so many years, I have never changed the brake oil, and I have not seen that he can't brake? The people in the repair shop always say that they want to replace the brake oil in time, because they want to make me money! Not really.
First of all, there is no doubt that brake fluid needs to be replaced regularly. Depending on the model, the specific replacement cycle is indicated in the maintenance manual. Generally, it is not a problem to change once every three years, or once the mileage reaches 6 kilometers.
Secondly, it is not necessary to change the brake oil at any time, so that the brakes will not turn, but that its sensitivity will become lower and lower over time, and the impact on our driving safety will be difficult to predict.
If we want to brake sensitively, we need this brake oil to have strong fluidity, low freezing point, high boiling point, not easy to deteriorate, and small quality change. So in addition to the mileage, when is it time to replace the brake oil? The first case is when the water content of the brake oil is high. Moisture and impurities in the air will enter the interior of the oil storage tank through the ventilation hole, the brake oil has hydrophilicity, and the water content in the brake oil will exceed the standard for a long time, and its boiling point will be reduced, once the moisture in the brake oil encounters high temperature and evaporates into water vapor, the braking reaction will become sluggish. In addition, it may cause corrosion on the paint surface.
No matter what kind of oil, it will deteriorate over time, and brake fluid is no exception. When the brake oil becomes dirty and black, it means that it has deteriorated, we do not have professional judgment tools, the most intuitive feeling is that the brakes have become soft. The continuous use of deteriorated brake fluids not only leads to sluggish braking, but also wears out the total pump piston in the braking system, reducing its service life.
There are three types of brake fluid, namely DOT3, DOT4, DOT5, and each car's brake oil can be marked with its specific model. In addition, it should be noted that during the replacement process, try to avoid injecting too much air, otherwise it will also cause the brakes to become soft.
We usually drive on the city road, the road surface is relatively gentle, coupled with many vehicles on the market are equipped with automatic stop function, may not be so frequent use of sharp braking, naturally do not perceive the braking system becomes sluggish. It is recommended that you can replace the mileage in advance when it is close to 60,000 kilometers, change it early and rest assured, in case of any emergency, the car can be firmly parked and is also responsible for its own life safety.