It sounds like there's a burr, nick or scratch in the fitting seat or
the end of the flare.  Maybe a poorly-made T-fitting?  Closer inspection
is required.  Remove the T-fitting and look inside to see whats not
right in there.

Not sure about the broken actuator rod.....

Mike B.

On 8/19/2013 11:12 AM, Dan Barrett wrote:
> Someone talk me down from the ledge here.  I've replaced the brake
> lines, including the T fitting at the rear of the bus.  New lines, new
> T, new nuts.  All of the new joints hold pressure fine except for the
> joint where the line from the front of the bus runs into the rear T
> fitting, which weeps a minute amount of fluid.
>
> I removed and reassembled that joint to make sure that I hadn't screwed
> it up or failed to tighten it enough.  The flare on the line is good
> (symmetrical, correct diameter, not misshapen in any way), and I've
> tightened the nut with a flare nut wrench and then with a Channellock
> Nut Buster + leaning my full weight on it.  I can't get it any tighter.
> Still, upon reassembly, it continues to weep ever so slightly (maybe one
> drop every couple of seconds with engine on and me pumping the brake
> pedal).
>
> What have I done wrong?
>
> Bonus question: as fitting this job, the parking brake actuator rod
> sheared when I tried moving the parking brake adjustment nut.  It
> doesn't look to me as if any of our trusty vendors sell the actuator
> rod.  Anyone got a part number on it, or a line on where it can be
> found?
>
> Best,
> d.
>
> --
> 1990 GL