What should I do if the brake cylinder does not return?

I believe that everyone has some knowledge about the brake cylinder, which is an indispensable part of the brake system. But it is also an auto parts with a relatively high failure rate, and many different symptoms may often appear. And the brake cylinder does not return to the position mentioned below, that is to say one of the problems. So what are the main symptoms of the brake cylinder not returning? How to fix the brake cylinder not returning?
The main symptoms of the brake cylinder not returning:
The brake cylinder does not return. Simply put, after stepping on the brake pad, the pedal will not rise and there will be no resistance. Even if you do not step on the brake pad, you still feel that the car has a lot of resistance, even if it is more serious. The problem of wheel lockup often occurs. At this time, everyone must check whether the air brake master cylinder and the parts of the brake master cylinder are often damaged, or whether there is wood and rust inside the brake cylinder often occur. But no matter what the reason is, it must be handled properly. After all, the failure of the brake master cylinder to return to position immediately endangers safe driving.
As for how to repair it, if it is damaged immediately, there is no way to repair it. You can only replace it with a new one. It should also be noted that the process of removing and replacing the brake master cylinder must be exhausted, and the brake fluid at this position will definitely be lost at this time, so it is best to remove and replace the brake fluid together. If it is rusted internally, disassemble the brake master cylinder immediately, and then polish the corroded water sandpaper with water sandpaper. Of course, you can also apply car oil to prevent it from rusting again.