I often get feedback from customers "Wendy, why isn't your master cylinder working? Why is it squishy when you hit the brakes?"
In fact, this problem is very simple, it is not a problem of product quality, 99% of the problem is that you have not exhausted the air in the cylinder before use
The working principle of the actual master cylinder is very simple.
We can regard the brake master cylinder as a commonly used syringe in the hospital. Everyone knows that before the nurses use the syringe to inhale the liquid, they push the piston to the bottom to exhaust the internal air. As long as the sealing of the needle tube is ensured, when the liquid in the injection tube is pushed forward, the piston can be ensured that no air leaks, and all the liquid in the needle tube can be injected smoothly.
If there is a lot of air in the cylinder, it will cause the gas volume to increase, the pressure at this time to decrease, and the force to decrease, resulting in the above-mentioned "product can not work or The problem with the soft brakes"
Attached is a video of the working principle of the brake master cylinder for your reference：