What Causes the Brake Pedal to Be Hard to Press?

1 Answers
VanRiver
07/30/25 3:52am
The reasons why the brake pedal is hard to press are: 1. The car's vacuum booster pump is leaking or malfunctioning: Without the booster, the brake pedal becomes difficult to press; 2. The brake was pressed after the engine was turned off: The brake booster pump only generates vacuum when the engine is running. When the engine is off, it relies on the residual vacuum, which depletes after a few presses. However, it will restore once the engine is started, and this is not a malfunction. The brake pedal is the pedal that restricts power, i.e., the pedal for the foot brake (service brake), used for deceleration and stopping. The working principle of the brake pedal: A wheel or disc is fixed on the high-speed shaft of the machine, and a corresponding brake shoe, band, or disc is installed on the machine base. Under external force, it generates braking torque.
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