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Almost all the connections on my break lines are badly rusted. I try to turn the nuts that connect the hard lines to the flexible ones, but they're so tight that the hard lines start to flex before the nut will budge. I've tried soaking them with WD-40, but with no luck. Any tricks to get these things apart?

thanks,

matt k.
 

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A hacksaw. If they are that bad, replace them. You probably have rust on the inside of the lines if they are that bad on the outside. You can make your own or buy prebent stainless steel from a vendor like Classic tube. I was very happy with there product. the Stainless steel are great, but you can't make them, you can't make the flares. You could buy tubing from whetneys and bend your own. I tried that and wound up buying from Classic tube.
Dave
 

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He's right, if the lines are that bad your gonna want to replace them anyway. Hack away.
Now, if for some reason your trying to save them, the only way I know of is to use a tubing wrech and work it back and forth. The WD is a good idea, but if their toast their toast.
 

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Old mechanics trick, with a propane plumbers torch, heat the outside of the fitting nut, have a cup of cool water and wrench handy, cool it quickly by dumping the water on and then apply the wrench quickly-the line will usually break loose of the fitting.If still a little tight repeat, or apply some penetrating oil-DB blaster works great. Like others have said, if line is very rust on outside, it may not be worth saving.
 
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I've had this problem myself, i wouldn't even bother with hack saw, just a pare of side cutters will do it.

-John
 
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