How to adjust the disc brake if it doesn’t work?
Disc brakes are a common braking system in bicycles, motorcycles and other vehicles, and their performance is directly related to driving safety. If the disc brake fails, the braking distance may become longer or even cause an accident. This article will introduce in detail the common causes and adjustment methods of disc brake failure to help you solve the problem quickly.
1. Common causes of disc brake failure
Disc brake failure is usually caused by the following reasons:
| Reason | performance |
|---|---|
| Brake pad wear | Feeling weak when braking and braking distance becomes longer |
| Insufficient or deteriorated brake fluid | The brake handle stroke becomes longer and the braking force decreases |
| Disc is contaminated or deformed | Abnormal noise or vibration occurs when braking |
| Brake calipers misaligned | Uneven contact between brake pad and disc |
2. Adjustment method for disc brake failure
For different reasons, the following adjustments can be made:
1. Check and replace brake pads
Brake pads are the core component of the disc brake system. If they are severely worn, the braking force will be significantly reduced. Check the thickness of the brake pads. If it is less than 2mm, it is recommended to replace it immediately. When replacing, be sure to choose a model that matches the original manufacturer and ensure it is installed securely.
2. Replenish or replace brake fluid
Insufficient or deteriorated brake fluid will affect braking performance. Open the brake oil bottle cap and check whether the oil level is within the standard range. If the oil is cloudy or has bubbles, it needs to be completely replaced. When replacing, pay attention to evacuating the air in the system to avoid affecting the braking force.
3. Clean or replace the disc
Oil stains or deformation on the surface of the disc will cause the braking effect to decrease. Wipe the dishes with special detergent to remove oil stains. If the disc is severely deformed, it needs to be replaced with a new one. When installing, make sure the disc and wheel hub fit perfectly to avoid deflection.
4. Adjust the brake caliper position
Misaligned brake calipers can cause uneven contact between the brake pads and the rotor. Loosen the caliper fixing screw, gently pinch the brake handle to center the caliper automatically, and then retighten the screw. Make sure the brake pad and disc clearance are even.
3. Test after disc brake adjustment
After completing the adjustment, a test is required to ensure that braking performance returns to normal:
| test items | Standard |
|---|---|
| braking force | The brake handle has moderate stroke and even braking force. |
| Abnormal noise | No sharp noise when braking |
| Jitter | There is no abnormal shaking of the handlebar or body when braking. |
4. Daily maintenance suggestions
To extend the life of your disc brakes and maintain good performance, the following maintenance is recommended on a regular basis:
1. Check the thickness of the brake pads once a month and replace seriously worn brake pads in time.
2. Replace the brake fluid every six months to prevent the fluid from deteriorating.
3. Clean discs and brake pads regularly to prevent oil accumulation.
4. Avoid long-term continuous braking to prevent overheating and deformation of the disc.
5. Summary
Disc brake failure is a common problem that cannot be ignored. With the adjustment methods described in this article, you can quickly solve most disc brake problems. If the problem persists, it is recommended to contact professional maintenance personnel for further inspection. Regular maintenance and proper use are key to maintaining disc brake performance.
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