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How to Adjust the Tightness of Car Brakes?

2 Answers
LaLayla
08/27/25 6:18am
If you want to adjust the brake pedal travel, there is a nut under the pedal that can be adjusted. If you want to adjust the clearance, most modern cars are equipped with automatic adjustment and do not require manual adjustment. Here is the relevant introduction: 1. Automatic slack adjuster brake system: Cars are generally equipped with an automatic slack adjuster brake system, which can automatically adjust the car's brakes. Regular inspections should still be performed during daily use, as the automatic slack adjuster brake system may experience some malfunctions. 2. Automatic adjustment principle: The automatic slack adjuster is preset with different brake clearance values. During normal use, if the brake clearance exceeds a certain limit, the brake adjuster will drive the internal one-way clutch structure to reduce the clearance by one gear, thereby keeping the brake clearance within a reasonable range and ensuring normal brake operation. 3. Adjustment differences: Due to different car models and varying vehicle weights, there may be some differences when adjusting the brakes. It is essential to ensure that the brakes on the same axle are adjusted consistently, as different models have different loads, and the tightness of adjustment may also vary accordingly.
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OLondon
09/09/25 5:12am
I've always enjoyed adjusting the brakes myself, as it helps me understand my car better. To adjust the tightness, first ensure the car is parked on level ground and the handbrake is engaged. For disc brake systems, you can remove the wheel to access the brake caliper's adjustment screw. Using a wrench, turn the screw counterclockwise to loosen it slightly, which increases the brake pad clearance and makes the brake pedal feel looser. To tighten the brakes, turn the screw clockwise. Don't forget to check the brake fluid level; if it's low, top it up with the appropriate DOT fluid. After each adjustment, I always test the brake pedal feel—the normal travel shouldn't exceed halfway. Regular checks like this can help prevent brake failure. Remember to have all the necessary tools and wear gloves for protection.
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