When relining drum brakes, what is true regarding spring replacement?

In the context of relining drum brakes, both the necessity to replace return and hold down springs as well as the condition of contamination is important. Springs play a crucial role in the functioning of drum brakes by ensuring that the brake shoes return to their original position after the brakes are applied and that they remain secure against movement.

Replacing return and hold down springs is critical when relining drum brakes because these springs are subject to wear and fatigue over time. If they are not replaced, they may not provide adequate tension, leading to potential braking issues. This maintenance step ensures that the brake system functions properly and safely.

Additionally, springs should be replaced if they are contaminated with grease, oil, or other substances that could impair their function. Contaminated springs may not provide the necessary force, which can lead to improper engagement or disengagement of the brake shoes, ultimately compromising safety.

Therefore, recognizing the importance of both replacing springs proactively and assessing their condition for contamination supports best practices for brake maintenance, confirming that both positions articulated by the countermen are valid and relevant in ensuring safety and performance in drum brake systems.