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There are primarily two types of springs in a drum brake system return springs and hold-down springs. Return springs are designed to pull the brake shoes back to their original position after the driver releases the brake pedal. This action prevents the shoes from dragging against the drum, which not only enhances fuel efficiency but also prolongs the life of the brake components.
drum brake spring

2. Heat Dissipation Another crucial function of painting brake drums is improved heat dissipation. Brake systems generate significant heat during operation, especially under heavy braking conditions. A black finish can enhance heat dissipation, as darker colors tend to absorb and radiate heat more effectively than lighter colors. This can help maintain optimal operating temperatures, which is essential for preventing brake fade—a reduction in braking efficiency due to overheating.
brake drum paint black
