Brake linings for common models, replacement standards […]
Brake linings for common models, replacement standards for brake discs
Listening to the sound: If the brakes are accompanied by the sound of a "iron-iron" or a squeak (or the effect that the brake pads will run-in at the beginning of installation), the brake pads must be replaced immediately. Because the limit marks on both sides drum brake of the brake pads have directly rubbed the brake discs, it proves that the brake pads have exceeded the limit.
In this case, when the brake pads are replaced, the brake discs should be checked. When such a sound occurs, the brake discs are often damaged and scratched (as shown in the figure below). Even if new brake pads are replaced, Can not eliminate the sound, it is recommended to replace the brake disc in time.
In addition, some bad quality brake pads have hard spots, which will also produce abnormal noise. In general, the abnormal noise generated will disappear after a period of wear.
Usually, whether the warning light of the brake disc on the instrument panel is lit is the basis for judging whether the brake disc should be replaced. Generally, the indicator light is off. When the brake disc is faulty or excessively worn, the light is turned on and is extinguished after repair. When the warning light is on, the brake disc has worn to the limit, the brake effect has been reduced, which greatly affects the safety of driving. Therefore, we recommend checking the brake disc wear condition regularly to see if it can be used, instead of just trusting the warning light.
Look at the thickness: Most brake disc products have a wear indicator, which is to distribute 3 small pits on the disc surface. Use a vernier caliper to measure the depth of the pit is 1.5mm. In other words, the total wear depth of the brake disc on both sides reaches 3mm. When the quasi-wear and complete wear shown in the figure below appear, we recommend replacing the brake disc in time.
Of course not all brake discs have wear indicators. We can use our fingers to touch the extension of the disc to determine the approximate depth. Generally speaking, if the total wear depth of the brake disc on both sides reaches 3mm, the brake disc should be replaced in time.