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What are the reasons for the hard brake pedal in Sylphy?

1 Answers

RowanFitz

07/30/25 2:53am

Sylphy brake pedal hard to press down may be caused by vacuum booster pump failure or dirty brake fluid. Vacuum booster pump failure: The reason why the Sylphy's brake pedal is hard to press down is due to vacuum booster pump failure. During braking, the vacuum entering the booster pump is controlled to move the diaphragm, and through the linkage device, the push rod on the diaphragm assists the driver's foot force to press and push the brake pedal, thereby amplifying the force applied by the driver. If the car's vacuum booster pump leaks or malfunctions, the brake will lose its main force, making it difficult to press down. The solution is to promptly take the vehicle to a repair shop for inspection and replace the vacuum booster pump to prevent accidents. Dirty brake fluid: Dirty brake fluid can lead to poor braking performance or increased stopping distance. The boiling point of brake fluid decreases, making it prone to boiling in the brake lines and generating bubbles, which significantly reduces braking effectiveness. Additionally, long-term accumulation of dirt can clog the lines. The solution is to regularly replace the brake fluid.

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