How to make ADB more durable and safer

At present, the new GB7258 regulations have been implemented, and the dangerous goods transport semi-trailer is also the first to be equipped with the full-vehicle disc brakes.

The three-axis and sash-type semi-trailers will also be gradually equipped with disc brakes. From traditional drum brakes to today's disc brakes, many card friends have a lot of questions about how to match the whole car, how to use it and how to maintain the disc brakes. Then we will answer them one by one.

How to match the disc brake main trailer?

Although the national regulations already stipulate the whole vehicle (main car + trailer) disc brake assembly of several types of vehicles, the matching of the disc brakes and the supporting equipment are still in a state of confusion.

Disc brakes are also known as disc brakes. The main components are brake discs, brake pads, brake cylinders, brake calipers, etc. The brake disc is locked with the hub by bolts, and the brake cylinder is fixed on the brake base plate, and the two brake pads on the brake caliper are respectively mounted on both sides of the brake disc. When braking, the sub-pump pushes the brake pad to squeeze the brake disc to form a friction brake under the action of the brake air pressure.

Mountain-area users also need an important equipment to use the full disc brakes, that is, the hydraulic retarder, although the regulations do not stipulate, but in fact this is a must. Because the disc brake can't use the water spray, if the long downhill is in the state without the retarder, it is difficult to ensure the safety of the vehicle. Therefore, if the mountain-area driver wants to install the full disc brake, It must be equipped with a hydraulic retarder

The new version of "JT/T1178.2-2019 operating truck safety technical conditions Part 2: Traction vehicles and trailers"

It will be implemented from July 1, 2019. Article 5.12 stipulates that the towing vehicle should be equipped with a retarder or other auxiliary braking device. This shows that the relevant departments have realized that the use of full-disc brakes without the use of retarders does not guarantee the safety. In fact, this is what the majority of the truck drivers’ hope, hydraulic retarders and full-disc systems. Dynamic matching is the reliable guarantee of safety.

In addition to the retarder, the full disc brake is better equipped with the upper airbag suspension, because if it is a steel suspension + full brake disc configuration, then the tire may be used in use, resulting in rapid wear and tear of the tire Or out of circle. However, if it is a configuration of the airbag suspension + full disc brake, then the whole vehicle will be a "squat" deceleration when using the brakes, which is very helpful for the brake system and extending the life of the tire.

Maybe someone would think that I can buy a full-board trailer alone? In fact, the whole trailer is not used by all the fronts, and it needs to be fully protected by the safety system.

Daily use points of disc brakes

There are also many taboos and points of use when using disc brakes.

1. The disc brake axle is not allowed to be water cooled. Because the brake disc at high temperatures is exposed to water, it is likely to crack or even break, which will seriously affect the safety of the vehicle.

2. The tires, wheels, suspension system, brake system, etc. need to be inspected before the vehicle is running. Do a good job of daily use testing, find problems and solve them in time, then can reduce security risks.

3. Every two weeks or frosty days, you need to open the drain valve at the bottom of the air reservoir to drain the water to ensure that the brake system air circuit will not be blocked.

Inspection and maintenance of disc brake axles

In addition to paying attention to the use of points, Friends with trucks also need to repeat the inspection of the brake system on a regular basis according to the frequency of their own brakes. For example, if the vehicle is often driving on a mountain road, a long slope, or having frequent braking habits, then it is necessary to increase the frequency of inspections.

rTo avoid damage to the brake discs and brake calipers, TOGET experts also gave some standard data: The Friction material must be replaced before its thickness anywhere up to 2mm.

If the friction plate is found to be burnt, cracked, polished, and contaminated by oil, it must be replaced immediately to prevent the brake system from malfunctioning.

Emphasize that try to choose suppliers of famous brands original accessories when replacing disc brake components，Inferior brake pads and brake discs may wear out quickly, and even the brake system may fail due to insufficient braking friction.

Please remember to check the axles when doing professional maintenance, such as grease the axles every year or after each replacement of the brake discs.

Disc brakes will soon be widely available, and only know how to match the main trailer to maximize the benefits of disc brakes. Of course, routine maintenance and inspection is an indispensable process. Once the brake system is found to be abnormal, it must be checked and replaced in time. Only in this way can the safety accident be minimized.