No, I did not mean to type "drum"...
So I've bled the brakes a few times on the Jeep since I got it. Braided stainless hoses, so I should be able to make them rock hard, and keep them there. Every time I bleed them, I make them nice and solid, but a few days to a few weeks later, they're always softish again. And I still have the pressure brake switch, which I've found to be a good indicator of whether or not the brakes are well bled. If they are, the lights come on as soon as you start to touch the pedal; if they're not, it takes some travel before the lights come on.
Last time, I decided to go ahead and flush the entire system, and make good and sure I got all the old dirty fluid out. Now the brakes are kind of soft again, and the fluid is dirty again, which, I made good and sure that the fluid was crystal clear when I flushed it.
My suspicion is that there's a lot of junk in the steel hardlines from sitting before I got it, which slowly works its way into the fluid over time. Is there anything I can do to get those lines thoroughly cleaned, without completely replacing the lines? I mean I've tried some gravity bleeding but clearly it didn't get it all out.
It's just irritating is all. I thought I finally had them all rock hard and solid, and wouldn't have to worry about them for awhile, but that's evidently not the case.
Also--I noticed that in the bottom of my master cylinder, the chamber closest to the back of the Jeep is the rear one, and it has two holes in the bottom. The front only has one. Is this right? PO replaced the master cylinder, and it seems backwards to me... Additionally the chambers are the same size, and I have disc brakes up front. But that shouldn't affect the brakes staying bled...