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Tap the Air Brake system?

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jd_is_me:

--- Quote from: Ned on August 04, 2005, 05:06:15 PM ---Freightliner puts a manifold on the firewall.  It has 7 ports, one is usually used for the air horns.  It will have allen screws in the available ports.  I have added a quick connect fitting to one port to attach an air hose that will reach all of my tires.  Drain the air tanks before removing the screw or you'll get a BIG surprise when it comes out at 100+psi :)  There is a check valve that prevents total air loss but it's still risky to do it under pressure.  I know, I've done it :)

--- End quote ---

Ned, thanks.  What does this manifold look like?  When you say "firewall" you mean it's up front accessable from the generator access door?  Also, how do the air bags work in this system?  I can only find two air tanks and looks like one may be for brakes and the other for air bags....which is different than what I would have expected.

Ned:
I don't have a picture, but it's about 6" tall and is roughly cylindrical.  There is probably one air line attached to it for the air horns.  Yes, it's accessible from the generator compartment, unless National moved it, but that's not likely.

The air bags aren't attached to this manifold, they are connected elsehwhere.  The two air tanks are for the primary and secondary air brake systems.  I believe the air bags are connected to the secondary air system.

jd_is_me:
Great!  Found it!  National put a small compartment, first one on the drivers side.... for many of the electricals....fuses, conector panels, etc.  The manifold is in there....geez, couldn't be easier.  Thanks for the help.

Ned:
Glad you found it.  Just be sure to follow my cautions before you try hooking up to it.

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