Steve, doesn't sound right here! First, how do you have two lines on MC as
they only had one outlet on back of it? Second this line should go short
into a tee on left of frame near MC that splits to rear line running along
frame to back hose to axle. Line comes off that tee to front brakes that
have another tee near there with one line going to left and other following
your bellhousing x-over under engine and up to other side. Both go to frame
holes above axle centerline or so and into holder for the hose to wheel to
affix to. The one in x-over is sometimes down in the bends at bottom edge
and maybe full of grease/dirt/gunky stuff and hidden some. There is a clip
or two on this line holding it to x-over. This is one place that breaks
from junk rusting it out, OR sometimes can be like new if full of greasy
gunk. Most lines will rust out where there is a fastener holding it to frame
tight. Do you have an Assembly Manual for AD's? They show brake line runs
in it for all models/sizes. These are for 54 models, but should be about the
same for 47 to 53 too. Those tees I mention are sometimes held to frame by
a big nut on outside. That is on my 2-tons and 1-tons frames. I save those
when I junk out trucks, they are very handy for running new lines and
changing locations. I use more modern plastic or plastic coated clips for
the lines along frames. It helps if you work at GM truck plant! Course now
most lines come in assembled and have all clips attached allready so no
extras around to "borrow".
G. L. Perry
Huntington, IN
-------Original Message-------
From: Steve Hanberg
Date: Sunday, October 27, 2002 20:24:55
To: oletrucks@autox.team.net
Subject: [oletrucks] Master Cylinder, part two
First, THANKS to all you who responded to my question yesterday! The
additional knowledge certainly helped.
I only managed to get a couple hours to work on it today, but have ordered a
new master cylinder (nearest parts house didn't have one on the shelf), and
have mostly removed the old one. I had trouble getting one of the brake
lines
loose, and discovered something interesting while trying to sort it out.
It seems that one line comes off the master and goes to the left front brake
A second line comes off the master and got to a T on the right side. A line
goes forward from that T to the right front brake, and a line goes from that
T
toward the rear for the back brakes.
As a result going with a dual master cylinder means also re-plumbing the
brakes at least the front brakes, since front and rear need to be split.
I haven't decided yet whether to buy pre-made lines, or to make my own.
I suppose everyone else is thinking I'm a dummy and should have known this
already. But just in case I'm not the only dummy I offer it as a warning to
anyone else upgrading brakes on an AD truck.
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
.
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oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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