How often should the brake fluid of a car be changed, and how often should the brake fluid of a car

Brake fluid is a liquid medium that transmits braking pressure in a hydraulic braking system. Also known as brake fluid or force-oil, its English name is brake fluid, which is an indispensable part of braking system.

Used in vehicles with hydraulic braking system, its braking working pressure is generally 2MPa, up to 4 5MPa. All liquids are incompressible, and when the liquid is under pressure in a sealed container or in a line filled with liquid, the pressure is transmitted quickly and evenly to all parts of the liquid. Hydraulic brakes work using this principle.

In the braking system, it acts as a medium for force transmission, because the liquid cannot be compressed, so the pressure output from the master cylinder is transmitted directly to the sub-cylinder through the brake fluid.

Change your brake fluid every two years.

Brake fluid is critical, and it's better to change it regularly. When your car is being serviced and the oil is changing, it is best to change the brake fluid by the way;

Generally speaking, brake fluid can be divided into alcohol-type brake fluid, mineral oil brake fluid and synthetic brake fluid according to its different raw materials, process and use requirements, among which synthetic brake fluid has the advantages of low condensation point, high boiling point, not easy to produce gas resistance, anti-corrosion, etc., and is widely used in high-speed, large-load automobiles.

When the driver checks the lack of brake fluid, he should replenish the same kind of brake fluid in time, replace the brake fluid, disassemble and repair the brake pipe, brake hose, brake master cylinder or sub-cylinder, or feel that the brake pedal is too soft and there is no leakage, then due to the frequent use of existing air in the pipeline, it should be exhausted in time and the brake should be adjusted. Exhaust starts with a sub-pump away from the master pump. Here's how:

Add enough brake fluid to the brake reservoir to the highest liquid level indication, connect one end of a transparent hose with the air release screw, and the other end is placed below the brake fluid level in a transparent container, press the brake pedal several times, and when the pedal is in the depressed position, loosen the air release screw on the sub-cylinder, and tighten the air defense screw immediately after preventing the brake fluid mixed with bubbles. Repeat this until the liquid flowing out of the sub-pump no longer contains air bubbles. Finally, tighten the airproof screws, install the dust cap of the airproof screws, add brake fluid into the reservoir to the specified position, and cover the lid of the reservoir.

Brake fluid is generally replaced once every 1-2 years, but also according to the climate of your location, brake fluid has a major feature is moisture absorption, moisture absorption is very easy to brake fluid water, water can lead to brake failure. At present, most of the markets are, dot3, dot4, dot5 numbers are larger, the higher the boiling point, the better, dot5 racing grade, the quality of brake fluid depends on the boiling point of the oil, the higher the boiling point, the better.

Brake fluid, also known as automobile brake fluid, was used in early automobiles to use drum brakes for mechanical braking. With the development of hydraulic technology, safe and reliable hydraulic brake systems are widely used in automobiles. Brake oil in the car brake system plays a transmission role, we step on the brake pedal with our feet, through the assistance of the vacuum booster, push the brake master cylinder, the brake master cylinder pushes the brake oil, the power under the feet through the brake oil to the brake cylinder to which the four wheels belong, the brake cylinder pushes the brake pads, and the brake pads squeeze the brake disc to form a braking force.

If the brake fluid is not changed in time, it will cause the brake fluid to be turbid, the boiling point will drop, and the effect will deteriorate, resulting in brake failure! Because the brake fluid system will always be worn, and the low-end brake fluid impurities will lead to the brake pump accelerated wear and brake system oil blockage, expired brake oil brake effect is not ideal, just because the owner has been adapting to his vehicle for a long time, so it is not noticed. In order to drive safely, it is recommended to replace it immediately.

Now basically in the maintenance manual of every vehicle, you will be told that the brake fluid has a number of kilometers to change, basically at 40,000 kilometers or should be replaced in two years.

The situations in which the brake fluid needs to be replaced are: 1. The brake fluid absorbs water or has impurities; 2. During the normal driving of the vehicle, when the brake is light and heavy, the brake oil should be replaced in time; 3. The expansion of the leather bowl of the sub-pump is too large; 4. Brake fluid needs to be replaced every two years. The precautions for the use of brake fluid are:

1. Avoid mixing with gasoline engine oil; 2. Replace it regularly; 3. Choose good quality brake fluid.

When the vehicle has been driving normally for 40,000 kilometers or the car brake fluid has been used continuously for more than 2 years, it needs to be replaced in time. If the owner brakes a lot when using the car daily, the driving environment is relatively harsh, and the brake fluid needs to be changed flexibly.

Attached: Brake fluid replacement reference:

1. In the process of driving, if there is emergency braking or continuous braking, the brake indicator will alarm or flash, but the frequency is intermittent, which may be caused by the lack of brake fluid, and it needs to be checked and replaced in time.

2. During emergency braking, the braking distance is significantly longer than before, in addition to the factors of excluding brake pads, it may be caused by brake oil, and it is recommended that the owner solve it in time to avoid problems when braking.

3. When stepping on the brake pedal, if there is a feeling of softness and weakness, it may be caused by the deterioration of the brake oil, especially when the brake is stepped on continuously or frequently, the feeling of stepping on the brake is much softer than before, and it is elastic, which needs to be dealt with in time.

4. When there is a feeling of light and heavy when braking, it is also caused by the deterioration of the brake oil, and the excessive moisture in the brake oil leads to high temperature during braking, which turns the water in the brake fluid into water vapor, and there may be instability during braking.

Precautions for the use of brake fluid:

1. Different types of different brands of brake fluid can not be mixed, due to different formulas of brake fluid additives or different indicators of brake fluid, there will be different effects when used.

2. If the brake fluid inhales water or other impurities, the filter should be replaced in time to avoid insufficient braking force during braking and affecting the braking effect.

3. In the process of driving, if there is a brake deviation, it is recommended that the owner of the car brake system for a comprehensive inspection, if it is found that the brake cylinder bowl is too expanded, it means that there may be a problem with the quality of the brake oil, and the brake oil and the bowl need to be replaced in time to ensure the normal use of the brake system.

Car brake fluid is generally replaced every 2 years or every 40,000 kilometers. However, this cycle can be long or short depending on the use case. The replacement cycle of brake oil, the official maintenance cycle of each brand of car is different, which is related to the brand and model of brake oil, brake fluid has a certain corrosiveness, water absorption is also relatively strong, now many repair stations have special tools to detect the moisture content of brake oil, you can do a test to see if it needs to be replaced.

Brake system maintenanceReplace the brake pads, the braking effect of a car is ultimately determined by the brake pads, so keeping the brake pads in good condition is the most direct maintenance method of the brake system, brake pads and brake discs, are life-lasting, when they wear out to a certain extent must be replaced. In the normal use of general urban driving, their life is about 50,000 kilometers, and the life of brake pads is about 30,000 kilometers, but the specific situation depends on the operation of the owner, and it is best to check every 10,000 kilometers.

Change your brake fluid regularly, as it is the oil that has a significant impact on the braking system in addition to the brake pads. The maintenance of brake fluid is focused on ensuring that it does not deteriorate, especially to prevent moisture from penetrating. The brake fluid should be changed every 50,000 kilometers, and if you drive in wet areas for a long time, the oil change interval should be appropriately shortened.

<> "The quality of the braking system will directly affect the safety of driving, when the brakes are not effective, we must check the cause of the potato branch in time." So how often do you change the brake fluid for cars?

Car brake fluid is generally replaced once every 2 years or 40,000 kilometers. The owner can also go to the 4S shop or auto repair shop to test the brake fluid, and the brake fluid should be replaced in time if the test data is unqualified.

In fact, the replacement cycle is only a reference, whether it needs to be replaced in the end, but also according to the braking effect to decide, when driving obviously feel that the texture of the brake becomes soft, and even feel that the brake can not brake the car, it is necessary to check whether the brake fluid has oxidation, deterioration, if there are these problems, it is necessary to replace the brake fluid in time, otherwise there will be a certain danger if you continue to use it.

When the owner replaces the digital sensitive brake fluid, it is best to replace the brand brake fluid, although the ** is relatively high, but the effect is better, if the replacement of inferior brake oil, it will accelerate the wear and tear of the braking system.

2 years or 40,000 km.

Generally, the replacement interval of brake fluid is 2 years or 40,000 kilometers. However, most car owners feel that the brake is not bad after the replacement period, and it is very wrong not to change this cheap way, because the brake fluid is an oily product, and the oil quality will decline after the service period, and the braking performance will be reduced, which is easy to cause traffic accidents.

Precautions for using brake fluid

First, do not mix different types and brands of brake fluids. Due to the different formulations, mixing brake fluids will cause the brake oil to deteriorate.

Second, when the brake fluid absorbs water or has impurities, it should be replaced or filtered in time, otherwise it will cause insufficient braking pressure and affect the braking effect. This is particularly important due to the generally humid weather in southern China.

Third, if the vehicle travels normally for 40,000 kilometers or the brake fluid is used continuously for more than 2 years, the brake fluid is easy to deteriorate due to long use, and the fiber jujube should be replaced in time.

Fourth, in the normal driving of the vehicle, if the braking is light and heavy, the brake fluid should be replaced in time, and the braking system should be cleaned with vertical alcohol before replacement.

Fifth, when the vehicle is blind and deviates, the braking system should be comprehensively checked. If it is found that the leather bowl of the sub-pump is too inflated, it means that there may be a problem with the quality of the brake fluid. At this time, you should choose a better quality brake fluid to replace, and replace the leather bowl at the same time.