Why Does the Brake Make Noise When Lightly Pressed but Not When Heavily Pressed?
2 Answers
Reasons why the brake makes noise when lightly pressed but not when heavily pressed: 1. It is caused by the friction between the metal hard spots on the surface of the brake pads and the brake disc, which does not adversely affect the braking effect; 2. The friction sound between the brake pads and the brake disc. When the foot is lightly placed on the brake pedal, the brake pads will remain in slight contact with the brake disc, causing the friction temperature between the disc and the pads to rise. This carbonizes the surface material of the brake pads, forming harder substances, which results in noise during slight friction. Braking refers to the action of stopping or reducing the speed of a running locomotive, vehicle, other transport tools, or machinery.
I often encounter this situation where there's a noise when lightly pressing the brakes, but it goes away when pressing harder. Possible causes include dust or rust accumulation on the brake pads, especially after rain or in humid conditions, where uneven friction during light braking causes noise, but pressing harder applies more pressure to clamp the disc tightly, eliminating the sound. The material of the brake pads could also be an issue—low-quality pads are more prone to friction noise, or uneven wear on the edges of the pads may produce sounds. Check if the brake discs are rusted or warped; minor rust can be cleaned off by hard braking, but if the noise persists, consider replacing the brake pads. Regular maintenance of the braking system is crucial, including checking the lubrication of the caliper slide pins to prevent sticking, which helps avoid noise and ensures optimal braking performance.
