What Causes Hard Braking?
2 Answers
Reasons for excessively hard brakes that are difficult to press down: The vehicle's vacuum booster pump may be leaking or malfunctioning. Methods to protect brakes: 1. Braking technique to prevent "lurching": If there is sufficient braking distance, you can slowly and steadily press the brake pedal to decelerate, then gently release it as the vehicle comes to a complete stop. 2. Hill braking technique: Braking on uphill sections is similar to braking on flat roads—both require gentle pedal pressure—but the release should be quicker than on level ground. When braking downhill, avoid prolonged braking as this can overuse the brake pads and reduce effectiveness. Instead, use intermittent braking (pump braking) to decelerate and bring the vehicle to a stop.
I've been driving for decades and have encountered several instances where the brakes became unusually stiff. Generally speaking, the most likely culprit is a problem with the brake booster. This device relies on engine vacuum to reduce the effort needed to press the brake pedal. If there's a vacuum leak or cracks in the tubing lines, the pedal will feel extremely hard. Additionally, insufficient brake fluid or blocked pipelines can also make braking difficult, much like a water pump without water. From what I recall during my own inspections, you can try pumping the brakes several times with the engine running. If the pedal doesn't soften, it's probably an issue with the booster system. When driving normally, avoid sudden hard braking to prevent accelerated wear on components. If you encounter this problem, head to a repair shop immediately—never delay, as the risk of brake failure at high speeds is significant.
