Common Problems and Maintenance of Brake Shoes
Fault Symptoms:
Brake Noise: Caused by wear of the friction lining or foreign objects entering the brake drum.
Reduced Braking Force: Resulting from excessive clearance between brake shoes and drum, or aging of the friction lining.
Brake Pulling: Caused by uneven wear of the left and right brake shoes.
Maintenance Suggestions:
Inspect the wear of brake shoes every 50,000 to 80,000 kilometers. Replace the friction lining when its thickness is less than 2mm.
Regularly clean dust and debris inside the brake drum to avoid abnormal wear.
When replacing brake shoes, it is recommended to replace them on both left and right wheels simultaneously to ensure balanced braking force.
VI. Comparison with Disc Brakes
| Type | Brake Shoes (Drum Brake) | Brake Discs (Disc Brake) |
|---|---|---|
| Heat Dissipation | Poor, prone to braking force fade due to high temperature | Excellent, fast heat dissipation with ventilated disc design |
| Maintenance Cost | Low, friction lining is easy to replace | Higher, requires overall replacement if the brake disc is worn |
| Application Scenarios | Rear wheels, small vehicles, commercial vehicles | Front wheels, high-performance vehicles, mainstream passenger cars |
VII. Development Trends
With the popularization of disc brakes, brake shoes are mainly used in low-cost vehicle models or rear-wheel brake systems. However, some models still retain drum brakes to save space and costs (e.g., rear wheels of some compact cars). In the future, lightweight and low-noise ceramic friction materials will become the development direction of brake shoes.
