What is the reason for the serious wear of the brakes of the four hubs of the rear eight wheels?

Only one brake wear is seriously caused by the brake shoes not returning, and it is enough to adjust it.

Badly worn disc surface.

Yaw brake disc repair step.

1. First of all, the worn surface of the yaw brake disc is milled to remove the rough part of the surface and the depth of surface processing to ensure that the thickness of the yaw brake disc after processing is.

2. In order to ensure that the upper and lower clearance between the yaw brake disc and the yaw brake is within the range of 2-3mm, the upper surface of the yaw brake disc will be welded with a thickness of 8mm insert, the material of the insert is QT400, which is the same material as the yaw brake disc, which can ensure that the welding performance of the insert and the yaw brake disc is good, and the yaw brake disc is basically deformed after welding.

First, the brakes are adjusted too tightly.

Second, this brake cylinder bowl does not return.

Third, the return spring of the brake shoe is aging and relaxed.

How to maintain car brake pads.

Brake shoes, commonly known as brake pads, are consumables, which will gradually wear out in use, and must be replaced when worn to the limit position, otherwise it will reduce the effect of braking and even cause safety accidents.

Brake shoes are life-threatening and must be treated with care.

Most cars use the front disc rear drum brake structure, under normal circumstances, the front brake shoe wears relatively quickly, and the rear brake shoe is used for a relatively long time, and the following aspects should be paid attention to in the daily inspection and maintenance:

1.Under normal driving conditions, every 5000 kilometers of the brake shoe is inspected, not only to check the remaining thickness, but also to check the state of the shoe wear, whether the degree of wear on both sides is the same, whether the return is free, etc., and the abnormal situation must be dealt with immediately.

2.Brake shoes are generally composed of two parts: iron lining plate and friction material, and you must not wait for the friction material part to wear out before replacing the shoes. For example, the front brake shoes of the Jetta have a thickness of 14 mm, while the limit thickness of the replacement is 7 mm, including more than 3 mm of iron lining and nearly 4 mm of friction material.

Some vehicles have a brake shoe alarm function, once the wear limit is reached, the instrument will alarm to prompt the shoe to be replaced. The shoes that have reached the limit of use must be replaced, even if they can be used for a period of time, it will reduce the effect of braking and affect the safety of driving.

3.When replacing, the brake pads provided by the original spare parts should be replaced, only in this way can the braking effect between the brake pads and the brake disc be the best and the wear and tear should be minimal.

4.When replacing the shoes, a special tool must be used to push the brake cylinder back. It cannot be hard pressed back with other crowbars, which can easily cause the brake caliper guide screw to bend and make the brake pads stuck.

5.After replacing the shoe, be sure to step on the brake a few times to eliminate the gap between the shoe and the brake disc, resulting in the first foot without braking, which is prone to accidents.

6.After the brake shoe is replaced, it needs to be run in for 200 kilometers to achieve the best braking effect, and the newly replaced shoe must be driven cautiously.