When winter comes, the netizen feedback their Trailer due to weather brake cooling is slow, the relay valve is frozen, resulting in brake locking, security. Today, there are some solutions to check and maintain the braking system in winter, hoping to bring some help to the friends who drive in winter.

How to maintain the brake system of trailer in winter

Check the connection of each gas path (including the connection of main vehicle and trailer)

With the arrival of winter, the temperature dropped lower and lower, and the seal or cushion is relatively hard, after a summer of wind and rain, sealing rubber ring is getting worse, especially above the axle pipe joints, the winter low temperature will cause the sealing pipe joint contraction, leakage and poor sealing performance, so we in the morning before cheer is sure to check the gas way of each joint seal. (the best one by one hand will shake, touch) such as leakage timely tighten or reinstall.

Two. Check the main vehicle drying tank

Check the main dryer tank to ensure that the main air source is dry and free of moisture. As the drying tank is air filter, with the use of time, lost the residual water vapor in the compressed air filtration. The compressed air does not achieve the purpose of drying, resulting in water and ice in the pipeline and the valve body, thus affecting the normal use of the brakes.

Three. Regular discharge of water from main vehicle and Trailer

In winter, the temperature is below zero, then just out of the compressed gas is prone to water or wet gas, the main vehicle and the trailer cylinder regular water, regular water in winter is shorter than the time interval between the summer, often put water, make sure the brakes use dry gas. If the water is not timely, the gas pressure inside the storage tank will enter the valve body, and when the temperature is below zero, it will cause the ice inside the valve body. Leading to the piston stuck in the valve, the final brake failure

Four 、 ABS system maintenance

ABS connections have multiple sensor joints, which act as sensing signals for the brake system, allowing the ABS to give certain instructions at the specific speed of the vehicle, giving the best braking power and frequency. So the sensor joints are loose, to ensure the fixed need to check and maintenance.

At the same time, brake drum ABS ring gear to regularly remove clean, to ensure a good tooth ring and the probe sensing signal, joint putty.

Analysis of common freezing of relay valve

1. The working principle of the relay valve

Baotou North heavy truck parts relay valve is a part of the automobile air brake system. In the braking system of the truck, the relay valve shortens the reaction time and the pressure to establish time. The air inlet of the relay valve is connected with the air cylinder, and the air outlet is connected with the brake air chamber.

When the brake pedal is depressed, the output pressure of valve as the control input pressure valve, the control pressure, the air intake valve open, then the compressed air by the air reservoir directly through the inlet into the brake chamber, without passing through the relay valve, which greatly reduces the gas pipeline brake chamber the acceleration of the inflation process of the gas chamber. Therefore, the relay valve is also called the acceleration valve.

2, why the relay valve will be frozen?

Usually, the following causes the relay valve to be frozen:

1) the spiral heat pipe is too short, when the compressed air from the air pump into the storage tank, the temperature can not be reduced to below 65 degrees celsius. Compressed air due to high temperature cold, contains too much water, into the valve body to produce water, air temperature below zero, resulting in icing. Cause the valve to die.

2) because the drying tank lost the filtration effect on the residual water vapor in the compressed air. The compressed air does not achieve the purpose of drying, resulting in water and ice in the pipeline and the valve body, thus affecting the normal use of the brakes.

3) the storage tank does not regularly discharge water, resulting in Baotou North heavy truck parts storage tank internal water with compressed air into the valve body, when the temperature is below zero, resulting in the valve body icing.

What happens if the relay valve is frozen?

When the relay valve is frozen when the card friends often choose to use fire, boiling water poured into the reservoir, add alcohol and other methods, but these are only a matter of expediency, if improper operation will cause damage to the valve and pipeline, to fundamentally solve the problem you can try the following several ways:

1. before the winter should be the body of the maintenance work, and smear a small amount of Vaseline in the valve body, lubrication helps the body of the piston.

2. check whether there is water in the storage tank, do regular discharge, if the water is too much, should consider the replacement of the drying tank.

3. check whether the compressed air in the storage tank can get good heat dissipation. If the compressed air is too hot, the length of the spiral pipe should be extended.

Note: the northern winter running will encounter many problems, temporary repair frozen hand frozen feet extremely uncomfortable, Baotou North Ben heavy truck parts as the vehicle brake valve as an important part of the brake, usually must do a good job of inspection, do a good job of maintenance, to avoid the problem.