Why do we need to check and replace motorcycle brake oil regularly

Update:06-04-2021
Summary:

Now more and more motorcycles use hydraulic disc brakes […]

Now more and more motorcycles use hydraulic disc brakes, which use what is called brake fluid to transmit pressure. Brake fluid is also known as brake fluid. The condition of brake fluid is related to our life safety. It must be checked regularly and must not be taken lightly!

It is the master cylinder at the root of the brake handle that generates pressure on the front brake. When holding the brake handle, drive the piston inside the master cylinder to exert pressure on the brake fluid. This pressure is transmitted to the piston in the brake caliper through the brake tube, and the pressed piston presses the brake shoe against the disc.

This structure moves "Pascal's law-the pressure applied to the sealed liquid is small and is constantly transmitted from the liquid to all directions". The area of ​​the piston in the caliper is larger than the area of ​​the piston in the master cylinder, which greatly increases the operation of the brake handle. With this structure, even a less powerful rider can produce enough braking force to stop a heavy motorcycle.

Why change the brake fluid

In motorcycle maintenance, when it comes to brand, engine, and fuel consumption, every motorcycle lover can say a few words, but when it comes to brake fluid, few people really know it. Then why do we need to check and replace the brake fluid regularly? A professional explanation is that after a period of time, the brake fluid will have lower boiling point, pollution and varying degrees of oxidative deterioration.

Brake fluid itself is a very stable pressure oil. Chemicals and high temperature are not easy to make it deteriorate, but there is a quirk that it will absorb water in the air. The biggest headache is the brake hydraulic system, which must be connected to the atmosphere outside the system to make it work properly, so the oil can cover has a vent.

In this way, the brake fluid will absorb the moisture in the air, such as the moisture that is not completely wiped clean when washing the motorcycle, the humid air in the rainy season, etc., may be absorbed by it over time, and the brake system may be absorbed for a long time or in an emergency. During the braking process, the temperature of the brake fluid will rise rapidly. At high temperatures, moisture will be converted into gas, which reduces the effectiveness of the brake. In layman's terms, liquids are incompressible, just like we can't buy compressed water on the market? But the gas can be compressed, and you can easily buy small cans containing compressed air such as pesticides and air fresheners in the supermarket. Just a small bottle of stuff can at least fill the entire compartment of an ordinary sedan. In other words, if the air in the entire compartment of an ordinary sedan is compressed, only such a small can can be installed.

Imagine if there is a certain amount of air in your brake system, whether when you pinch or step on the brake, the air in the system will be compressed. Suppose, a "healthy" brake filled with brake fluid If the braking force generated when the brake lever is pressed down is 10, the braking force generated by the "unhealthy" braking system containing half of the air is only 5 or even less when the brake lever is pressed down.

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