What are the reasons why the vehicle brake sometimes cannot be pressed down?
2 Answers
The reasons why the vehicle brake sometimes cannot be pressed down are: 1. The vacuum booster pump is leaking or malfunctioning; 2. There is too much debris in the brake master cylinder, the seal is not tight, the vacuum booster pump fails, or the brake fluid is too dirty; 3. Several types of brake fluid are mixed and generate vapor lock after heating, the brake master cylinder or wheel cylinder leaks, or the air reservoir or pipeline interface leaks; 4. Improper operation causes mechanical failure. The function of the brake is to reduce speed or stop the vehicle. Its working principle is: by using the friction between the brake pads and the brake drum, as well as the friction between the tires and the ground, the kinetic energy of the vehicle is converted into heat energy after friction, thereby slowing down or stopping the vehicle.
I recently experienced a situation where the brakes didn't feel firm while driving, which made me quite nervous. The most common causes are insufficient brake fluid or a leak. Over time, brake fluid absorbs moisture, leading to a hard pedal. Additionally, if the brake booster fails, the pedal can become as hard as a rock because it relies on engine vacuum for assistance. Sometimes, aging hoses can crack or air can enter the brake lines, causing similar issues. I recommend regularly checking the fluid reservoir to ensure it's above the 'min' line. If you notice anything unusual, don't hesitate—visit a professional shop immediately to avoid roadside trouble. Safe driving is no joke; developing a habit of monthly minor checks can save you a lot of hassle.
