There is an essential difference between semi-trailer braking and ordinary vehicle braking. Many novice drivers of semi-trailers lack knowledge of the structure, design and basic maintenance of lowboy semi trailer. When a brake failure occurs during driving, it is often helpless and even causes a serious accident.
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The gap between the brake pad and the brake hub is too large, the relay valve fails, and the material of the brake pad is not good. This is the most common cause of brake failure. Airline leaks are usually caused by rupture of gas pipelines, aging and falling of raw tape, and rusting of interfaces.
Once the air leakage occurs, the brakes will soften or even fail, and the trailer equipped with the emergency relay valve will enter the safe braking state, the automatic brake will be parked, and it needs to enter the safe area for maintenance after emergency treatment.
The wear of the brake pads will cause the gap between the brake pads and the brake hub to become larger, and it is prone to brake failure during braking. In addition, when adjusting the brakes for empty cars, the repairman generally adjusts the brake clearance slightly to prevent the empty cars from braking too quickly. Once the heavy load is applied, the brakes are prone to failure.
Therefore, the driver should pay attention to the vehicle's carrying conditions To distinguish the braking reaction between no-load and heavy-duty, adjust the brake frequently if necessary.
This situation is more common in cold regions in the north. Relay valves often fail due to freezing. It can be said that the relay valve is the core component of the semi-trailer braking system. Once the relay valve fails, it is extremely easy to cause an accident.
For semi-trailers equipped with an ABS system, asbestos-free brake pads must be installed. The powder generated by semi-metallic and metallic asbestos brake pads is likely to interfere with the working environment of the ABS sensor, making the ABS system impossible The ideal effect even caused the brakes to lock up.
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The emergency solution is to reconnect the damaged location of the pipeline with a quick connector and replace the rusted and corroded joint. If the brake cylinder is leaking or damaged, you can plug the air inlet with a threaded plug, and adjust the brake adjustment lever to release the brake, so that the vehicle can quickly enter the safe area for maintenance.
Of course, a better solution is to prevent it from the source. Choosing a better gas path accessory can greatly reduce the occurrence of failures and avoid many maintenance troubles.
To check the condition of the brake pads regularly, if the spacing is too large, you need to adjust it in time. It is really impossible to judge whether the spacing is large or small. You can adjust it in a simple way. First, tighten the screw of the adjusting arm with a screwdriver, and then turn it 90 ° in the direction of loosening.
Of course, the most important thing is to check the condition of the brake pads. If the wear is severe, it must be replaced in time. Because it is a trailer with a free adjustment function, it must not be careless. It is also necessary to check the brake pads on regular basic maintenance.
The relay valve freezes, which is usually caused by the water vapor in the gas path being cold and frozen. The solution is to open the drying tank to take out the ice cubes and blow-dry the inside of the drying tank.
As far as possible, choose non-asbestos high-quality brake pads, especially semi-trailers equipped with ABS (some card friends removed it after completing the household, and though it was not easy to use. In fact, know how to maintain it so that ABS can run normally. It can play a significant role in the safe driving of card friends).
In addition, when we are driving, we must equip the vehicle with necessary wearing parts, such as nylon tubes, quick connectors, raw tape, plugs, joints, etc.
Semi-trailer brakes are different from main vehicle brakes. You often ignore the problem of semi-trailer brakes. They lack the necessary understanding of the lowboy semi trailer brake system, which not only delays driving, but also brings huge hidden dangers to their own safety. Therefore, no matter how busy you are, You must take the time to learn vehicle knowledge and prevent problems before they occur. After all, money can be earned slowly, but life cannot be repeated.
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