Drum brake problem.

[theb]

Wanted to check why passenger side drum brake is squeaking and did one mistake. After removing the drum I noticed that both pads are worn unevenly, left at the top and right at the bottom and also noticed that at the points where pads are touching that plate behind them when in resting position, are rusty. So i sat in the car and pumped the brake few times and immediately heard brake fluid leaking. After checking what happened, here’s the picture


I don’t even know what’s the name of that part but the right side was stuck. The rubber didn’t come off as you see it in the picture, I removed it to see what’s under and why it wouldn’t go back. And fluid was leaking from there as I was trying to adjust it. So somehow I managed to push it back in and now I think works ok, at least slides in and out as it’s supposed to.

Any idea if I have damaged something inside and did any air go inside the lines? I’m just not comfortable playing with brake fluid. Of course I could add some more in the master cylinder.

Here’s bigger picture of the brake. Liquid at the bottom is not brake fluid, it’s brake cleaner, don’t get confused.