brake work
I just did this job on mine - bent up new lines and everything. The brake clean followed by lube mentioned earlier is good advice. I would recommend getting a really high quality 10mm Flare wrench, the better ones tend to flex open less under stress, which means less chance of rounding. I didn't believe that at first until i compared my old grey 10mm to my neighbour's shiny new snap-on. Bonus canuck points if you know grey tools...
Additionally, if you're replacing the lines, I would cut the line above the fitting before pulling the fitting off. I know mine were so rusted that they weren't spinning around the line - so I had to overcome the seized bolt AND try and turn/ bend the line. Cutting it removes that extra resistance. I'm not sure if thats really that big of a deal, but it seemed to help for me.
If you need to replace the fittings, there are 2 lengths; 0.7" + 0.91" [17.75mm , 23.15mm] ... from the sounds of it, right in the middle is the perfect length for replacements. The cheap ones you get from napa are too short and hex head jams up before the threads fully engage.
Their flare kit works really well, and theres tons of threads for good instruction on how to do it- my only thing to add to them is this: when you use a pipe cutting tool, it leaves a very tiny, very thin strip that weakens the final flare and doesnt let the mandrel sit flat. Drilling that out with a 3/16 bit - very gently, makes for a consistently good flare.
Good luck + happy bending...
