Correct axle end mount of rear brake hose

B

Bob Prohaska

Member
Can anybody point me to a photo, drawing or description of the
correct way to mount the axle end of the rear brake hose on a
Scout 2?

Mine's a '72, converted to disk/drum Dana 44's. From the looks
of the rear hose it's got a drilling that seems intended to bolt to
the axle, with the two hydraulic lines coming out on either side.

Mine is just hanging on the flare fittings. There's a bolt nearby,
but it seems not quite aligned with the apparent bolt hole.
It looks like a thorough botch, but it's worked for a long time.

The hose is wet, so there's a leak somewhere. The mc isn't
losing appreciable fluid so I don't have to fix it right away, but
it can't wisely be ignored forever. Since the axles have been
swapped I'm wondering if the dangling fitting is somehow
related to the swap.

The hex on the flare fitting to the left wheel cylinder is badly
rounded, so the fix might be somewhat difficult. I'd like to meet
all the flies in the ointment before taking anything apart.

Thanks for reading!

Bob prohaska
 
The hose goes to a brass block mounted to the axle by the vent bolt. Please fix asap. It May last for a while or fail during a panic stop.
 
The penetrating oil is soaking in now. It looks like napa has
the hose. I just hope I can get the rounded flare nut off and
back on the new hose.

With a little bad luck this could turn into new hoses, lines
and wheel cylinders 8-(

thanks for writing!

Bob prohaska
 
At the very least a good set of vicegrips will get the flair nuts out of the wheel cylinders.
 
It turns out I was mistaken in thinking that the fittings on the
axle were the major hazard.......

The inverted flare nut connecting the hose to the front of the
car is stuck. I tried a line wrench, no hope. Then I got a
vice-grip 4lw, which has a v notched jaw that catches two
flats on the hex with a "thumb" . The 4lw is quite a bit more
secure than the line wrench, but it still wants to slip with the
amount of pinch it seems prudent to apply: squashing the nut
will either force a splice or a new pipe all the way to the front
of the Scout. Either scenario is worth much care to avoid.

The immediate plan is to get a spare nut and see how hard it
it to deform with the pliers. If I can use more force I will, if not
it's time for patience, heat and penetrating oil. The car needn't
be fixed immediately and I really don't want to make up a new
brake line to the front end; that looks like a lot of work.

Thanks for reading, and any guidance!

Bob prohaska
 
Cut the hard line just forward of the frozen nut.
Install a new nut on the line, flare the line.
Install the new hose.
Done.
 
Unfortunately the hard line will then be too short to reach the
frame anchor for the hose. I could of course unmount the line
where is crosses to the left side of the car, but I'd rather not
do something so desperate. At least, not yet :cool:

I've had to order a couple of 3/16" inverted flare nuts. Once I
get to see how much force they'll withstand before squashing
it'll be easier to judge whether I have any chance of getting the
old nuts out intact.

In the meantime, alternating heat and penetrating oil
applications should improve my odds....

Thanks for reading and replying!

Bob prohaska
 
fdchappie said:
the hose goes to a brass block mounted to the axle by the vent bolt. .
Click to expand...

It looks as if the vent bolt is just a 3/8-16 straight thread
tapped into the axle tube. When I took it apart there was
a nut locked against the axle tube, with a gob of red rtv
as an offering to the god of leaks.

There's no mention in my manuals, either in the brake or axle
sections, of how the vent is correctly assembled, but I can't
believe what I found is correct. It's understood that the vent
bolt goes through the brake hose terminator, but there
_has_ to be a better way of sealing the hole in the axle. Is there
some kind of curved spacer missing? I could probably make
one if I had to.

As an aside, the stuck inverted flare nut finally yielded without
damage after 2 days. Much credit to the vice grip 4lw
locking wrench. I'd surely have destroyed the nut without it.

Thanks for reading, and any ideas!

Bob prohaska
 
That's exactly what I have. The issue is sealing the bolt hole
in the axle tube.

What goes between the axle tube and the brake manifold block?

Unless there's some sort of seal, the vent drilling in the bolt
is entirely superfluous, the leak around the threads is more than
sufficient ventilation :cool:

thanks for reading!

Bob prohaska
 
I came to the same conclusion. Just for novelty's sake I used
polyurethane caulking material, to see how it performs. My
luck with rtv hasn't been all that good around lubricants.

The crudeness of the vent on the rear axle is a real surprise
when compared to the relative refinement of that used on the
front axle.

In any case, the Scout is back together and roadworthy.

Many thanks for your counsel,

Bob prohaska
 
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