How to adjust the size of freight car air pressure valve?

The air pressure of the whole truck system is determined by adjusting the pressure regulating valve of the dryer. If you want to adjust the air pressure of the truck, you can adjust the pressure regulating valve of the dryer. The specific method is as follows: 1. Find the distribution valve next to the air reservoir. There will be a screw above or below the distribution valve. 2. Adjust with screwdriver and wrench at the same time, loosen the screw with wrench, turn the screwdriver counterclockwise for half a turn, and then lock the screw. You must be careful when adjusting the air pressure of the truck. If the air pressure is not properly adjusted, the air pressure is too high, which may lead to the explosion of the air storage tank. Turn off the fire immediately if the air pressure is too high. Step on the brakes a few times and don't let the air pressure be greater than 8.