How to maintain the brake pad mainly includes the following six points:
First, under normal driving conditions, check the brake shoe every 5000 km, not only the remaining thickness, but also the wear condition of the shoe, whether the wear degree of both sides is the same, whether the return is free, etc. if any abnormal condition is found, it must be handled immediately.
Second, the brake shoe is generally composed of iron lining plate and friction material. Do not replace the shoe until the friction material is worn out. For example, the thickness of the front brake shoe of Jetta is 14 mm, while the replacement limit thickness is 7 mm, including more than 3 mm iron lining plate thickness and nearly 4 mm friction material thickness. Some vehicles are equipped with brake shoe alarm function. Once the wear limit is reached, the instrument will alarm and prompt to replace the shoe. The shoes that have reached the service limit must be replaced. Even if they can be used for a period of time, the braking effect will be reduced and the driving safety will be affected.
Third, when replacing, the brake pads provided by the original spare parts shall be replaced. Only in this way can the braking effect between the brake pads and the brake discs be the best and the wear is the smallest.
Fourth, when replacing the shoes, special tools must be used to push the brake cylinder back. It is not allowed to press back hard with other crowbars, which may lead to bending of the guide screws of the brake caliper and block the brake pads.
Fifthly, after the replacement, it is necessary to step on several foot brakes to eliminate the gap between the shoe and the brake disc, resulting in no brake on the first foot, which is prone to accidents.
Sixth, after the replacement of the brake shoes, it is necessary to run in 200 kilometers to achieve the best braking effect, and the shoes just replaced must be driven carefully.