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What causes the hard brake pedal and ineffective braking in a GL8?

2 Answers

BlakelyDella

07/28/25 3:16pm

Here are the reasons for a hard brake pedal and ineffective braking: 1. Insufficient brake vacuum assistance: A hard brake pedal is usually related to insufficient or lost brake vacuum assistance. Take the vehicle to a repair shop to check for leaks or malfunctions in the brake booster pump, pipelines, or master cylinder, and repair as needed; 2. Vacuum is only generated when the engine is running: The vacuum booster pump only generates vacuum and provides assistance when the engine is running. When the engine stops, it no longer generates assistance, though some residual vacuum may remain, which completely disappears after pressing the brake pedal when the engine is off; 3. Decelerator: The brake is a mechanical braking device that slows down the vehicle, also known as a decelerator. Simply put, the car's brake pedal is located under the steering wheel. Pressing the brake pedal causes the brake lever to be pressurized and transmit force to the brake shoes on the brake drum, clamping the brake disc to slow down or stop the vehicle.

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VonArya

08/11/25 10:48pm

I've driven quite a few cars, and issues with hard brakes or failure to stop usually involve a malfunction in the vacuum booster system—that part that helps us save effort. Normally, the brake pedal feels light, but now you have to press hard, feeling as stiff as a rock, and the braking distance may increase, making it hard to stop. Possible causes include a vacuum hose leak, booster pump failure, or insufficient brake fluid leading to inadequate pressure. This is quite dangerous, especially on highways. If you encounter traffic jams or sharp turns, you might not react in time. I recommend pulling over immediately, turning off the engine, and checking the brake fluid reservoir level to see if it's low. If the level is normal, it's best not to tamper with it and call for a tow truck to take it to a professional shop for inspection. Don't try to save money by ignoring minor issues that could lead to major accidents.

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