I'm near Paducha, Ky. Pulling into a truck stop with my 3 car trailer, and the pedal goes all the way to the floor. I blew the rear brake line that connect's at the t fitting. I'm hoping the reason it blew was from vibration. A couple of year's ago, I was changing the caliper. Had to take that line loose, and the bolt that hold's the wire support bracket broke off in the axle tube. Well that was one of those I'll fix it later deal's. Now I think it has vibrated from not being supported, and being bent around on several time's got fatiged, and now broke.

What has me worried is less than a month ago, I blew the internal seal on the master cylinder. Is there anyway something could be building up too much pressure and blowing the weak link in the chain so to speak. That's 2 freak occurance's in less than a month. Seem's too strange.

It's going to take 2 day's to get the part. The dealer, and Autozone is the only one's that can even order it. It won't be here until Friday at 3pm. Anyone happen to have a left rear brake hose in Kentucky. Anyone want to take me fishing. Anyone want to get me drunk.

 

Are your trailer brakes working well? Ive seen people w/o trailer brakes trying to stop trailers and with all the extra pressure, it blows out the weak spot in the break line. Just a thought.
I too had a brake line go bad in a short while. On my grand marquis. I just ran a new one next to the old one and within 8 months it rubbed 2 holes in the new line. THis was last week. I finally fixed it right.

 

My impression would be the line after your work over was just waiting to embrass you. MC was a wierd freak failure. Comment, don't be guilty of pushing old fluid back into MC and through ABS system also. Now, that bad fluid will wreck your day on MC and ABS unit also. Always open bleed valve when compressing caliper piston.