For vehicles with pneumatic braking, it is necessary to adjust the preload of the balance spring in the brake master cylinder reasonably. If the preload is too high, a hard feeling will be generated during braking. Pressing the brake will cause emergency braking, which is highly prone to accidents on icy roads in winter. For vehicles with hydraulic braking, it is also important to check the brake oil, brake pipelines, and various brake air pumps for leaks. If there are leaks, the brake fluid should be replaced in a timely manner.

We also need to adjust the hand brake. Its braking function is applied to the transmission shaft through mechanical transmission. When braking, the braking force is evenly distributed on the two rear wheels through two half shafts, which can effectively prevent the braking deviation of the two rear wheels. In other words, when using the hand brake on ice and snow roads to brake, it can prevent tail shaking and reduce the probability of accidents. The inspection of the hand brake requires that the hand brake be applied, The sound emitted by the lock block should not exceed three sounds. If it reaches five sounds, it indicates that the gap of the hand brake is too large. It is necessary to adjust it to reduce the free travel and effectively ensure safety.

In winter, when the car's air conditioning cooling system stops for a long time, the moving parts will experience a "bite" phenomenon, causing an increase in the starting resistance torque, causing the air conditioning electromagnetic clutch to slip, excessive wear, and even drying up the shaft seam, causing adhesion and failure, resulting in leakage.

Therefore, the key to winter maintenance of automotive air conditioning and refrigeration systems is to start the air conditioning and refrigeration system 2-3 times a month, each time for about 10 minutes. This will not consume much fuel, but it will avoid significant losses to the evaporator and compressor. To start the refrigeration system, you can choose to drive it for 10 minutes on sunny days with temperatures above 10 ℃.

If the heating system is stopped for a long time, it may also malfunction. First, try to check if there is hot air, if there is any abnormal noise when the fan is running, and if the air duct is unobstructed. Sometimes, the problem is that the antifreeze in the heating system does not flow for a long time, which condenses and blocks the circulation pipeline. Although it does not affect driving, maintenance is very troublesome.