Getting confused

The o-ring, or even the factory rubber thing, will not really hold that push rod in. It's always going to be fairly easy to pull out. But the pedal should not be able to travel up far enough so as for it to be able to pull it out. If the pedal can go up that far, something else isn't right.
I have seen them come out when you have to pump the brakes. It only takes a little and it jams . And guess what? rock solid pedal and no brakes.

This guy changed his Aspen to manual brakes years ago. He thought the same thing The stop light switch would hold it in. He killed a 50 year old guy turning into his driveway.

I towed the car below from the scene and had to testify as to what happened to his brakes. That part above is a lock ring and its life is one time being used . Once you take it out its junk. It is not rubber like the scrap the guy at Carlisle is selling . The one above has that groove for a reason without that groove you would not get it in. Its pretty solid.

028.jpg

029.jpg