1985 1300L UNIMOG
I've mounted an aux air tank for air ride seats and a train air horn. I will not be towing any trailers, so I thought I'd use the RED palm coupling line (glad hand) to provide air to the aux tank. I've removed both rear couplings and their respective air lines back to the distribution point that's mounted near the rear differential. There is a third small line that was connected to the red side palm coupling that terminates at a different point. What is that for? and can I eliminate? What's the best way? Here is where I'm not sure how to proceed. I thought about removing the metric fitting from where the line compression fitting is connected (yellow side) and get a metric plug to replace the removed fitting or somehow cap it. Is there a better way to block it. I'd also run a new line (red side) from it's metric compression fitting at the same distribution fixture to a metric compression - NPT fitting on the aux tank. Or would it be better to just change the metric fitting at the distribution fixture with a metric to NPT fitting, if such a fitting exits and run appropriate NPT compression fittings to the aux tank. Educate me, I lack the knowledge of what's available in metric fittings and metric to NPT adaptors that will work with what's there. Help would be appreciated,I really don't want to screw up the brake system.