What Causes the Brake Pedal to Be Hard to Press?

1 Answers
DelJace
07/30/25 4:43am
The reasons why the brake pedal is hard to press: 1. The car's vacuum booster pump is leaking or malfunctioning. The force applied to the brake pedal is amplified by the brake booster pump. If it fails, the brake loses its booster effect, making the pedal hard to press. 2. The brake was pressed after the engine was turned off. The brake booster pump relies on residual vacuum pressure when the engine is not running, which typically depletes after a few presses. However, this condition will restore once the engine is started and is not considered a malfunction. Braking, also known as deceleration, refers to the action of stopping or reducing the speed of moving locomotives, vehicles, other transport tools, or machinery. The general principle of braking involves fixing a wheel or disc on the high-speed shaft of the machine and installing corresponding brake shoes, bands, or discs on the machine base, which generate braking torque under external force.
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