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Foot brake valve. Don't know where hose goes.

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I'm looking for help. I have marked every air hose during disassembly of truck. Also kept every hose. Except this hose. It's the front lower port on an e6 valve. I don't know where or what it routes to.image.jpg.8ad76f0a1e204470677161760a39e4e9.jpg

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Check diagram on page 16.


Some folks have taped in with a small fitting for an airline to the dash for running a dual needle air pres. gauge to keep track of the secondary air tank as well as the primary tank.

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