Why does the brake feel harder than before?
2 Answers
Brakes are mechanical braking devices that can slow down the speed of a vehicle, also known as decelerators. There are two main reasons why the brake pedal feels harder than before: Vacuum booster pump leakage or malfunction: If you did not press the brake pedal after the car was turned off, or if you find it difficult to press the brake pedal while driving, it may be caused by a leak or blockage in the vacuum tube of the brake booster pump. Pressing the brake before turning off the engine: The brake booster pump only continuously generates vacuum when the engine is running. When the engine is not running, it relies only on the small amount of remaining vacuum assistance. Typically, this assistance is exhausted after a few presses, but this phenomenon will return to normal after restarting the engine and is not a malfunction.
I remember driving for over ten years, and when the brakes become hard, it's mostly due to an issue with the vacuum booster system. It could be a vacuum pump leak or a clogged vacuum hose, resulting in insufficient boost, making it harder to press the pedal. Another possibility is insufficient brake fluid or air entering the system, causing the pedal to stiffen, and in severe cases, affecting braking distance. During routine maintenance, check the brake fluid reservoir level—if it's too low, top it up or replace the fluid promptly. Don’t forget to inspect the booster connections for any unusual noises; if there’s any sound, head to the repair shop immediately. Preventive measures are simple: change the brake fluid regularly and inspect the braking system annually. This helps avoid safety hazards and ensures a more secure driving experience.