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- Oct 16, 2019
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It's a little outside my knowledge base, but my brother gave me a tool specificly for the "double flare" fittings. I've never used it, it just sits on the JIC shelf if I ever mess with brake lines, which is what it's for.
The point here is that a double flare is not made with a common flaring tool such as is used for a Propane line. There is(are) a disk that attaches in place of the "cone", specific to tubing diameter. Once that disk makes a fold, it is then replaced with a "cone" to make another fold. That is the tool you need to find. It is not a "standard" flaring tool. You need the specific tool for the application.
The application for the tool I have is for brake lines on a 40s model Jeep. Brake lines are one of those things that you don't try to "second guess" the design specs or tooling. It fails when you need it the most, not when you have a "git by" backup. I have an old model ('68) C-30 dump truck with a split master cylinder and a non-functional Mercedes valve. I don't know the proper name for it, but it isolates the front and rear drum brakes. When that is rebuilt, I guess I'll learn how to use this thing properly.
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I think those are called proportioning valves if my memory serves me right.
No guarantee there!
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