Excuse me, old masters, where are the adjusting screws for air braking of freight cars?

1, on the adjusting arm, you can see that there is a rotating rod connected to the brake cup, which is in line with the rear axle and goes deep into the brake drum. The adjustment method is to tighten it counterclockwise, and then loosen the front wheel 3 buttons and the rear wheel 2 buttons clockwise. The adjusting arm is equipped with a spring, which will make a clicking sound every time it is released. Some nuts have locking rings. Weigh it with the plum blossom of 17- 19, and just knock it with a small hammer. After adjustment, it will automatically return to its original position.

2. Due to design reasons, the direction of the adjusting arm may be different for different brands of cars, and the adjustment method for multi-axle cars may be different, but it is usually adjusted to the tightest (the spring will not ring when tightened) and then released, so it will be fine.

3. Can you guard against theft? Car thieves are worse than repairmen. He will cheer up when he gets into your car. So it's only self-deception to say that he can guard against theft. Deal with amateurs.

Nowadays, many cars are equipped with drying devices, so there is no need to deflate. If there is no such device, it depends. It used to be put once a week, and there was a switch with a spring just below the air reservoir.