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RE: [oletrucks] Disk brake problem

To: "'Claude'" <cramey@n-link.com>, oletrucks <oletrucks@autox.team.net>
Subject: RE: [oletrucks] Disk brake problem
From: "Hanlon, Bill" <Bill.Hanlon@COMPAQ.com>
Date: Mon, 17 Apr 2000 08:55:15 -0500
I figured it out.  My '57 GMC is a model 102 (1/2 ton with 
89" bed).  The equivalent Chevrolet would be a model 3204.

Section 5 sheet 7.00 of the Chevrolet Truck Factory Assembly 
Manual shows a connection like mine (large exterior nut 
attaching the frame end of the front brake hose to the frame) 
for Model 3204 and up while lower model numbers use a 
different hose that attaches to the frame with the spring 
clip so many of you have.  Most of the other brake hydraulic 
parts (lines, T fittings, etc.) seem to also be different.  
Looks like the 31xx models use 3/16" hard tubing while the 
3204 uses 1/4".  

I was planning to replace all the hard brake lines anyway 
so this was no big deal once I figured out that I needed the 
spring clips from the 31xx model.

Just thought I'd let you guys know before one of you with an 
89" bed half ton buys a six lug disk brake kit that supposedly 
fits "47-59 half ton".   

-----Original Message-----
From: Claude [mailto:cramey@n-link.com]
Sent: Friday, April 14, 2000 4:29 PM
To: oletrucks
Subject: Re: [oletrucks] Disk brake problem

My '59 only has the inside threads with a groove on the outside. It just
sticks thru the frame and is held in place by a square clip that snaps in
the groove. This is how the old ones were and the replacements matched it.
There's actually 2 clips. One on the outside of the frame ( kind of a C
clip) and one on the inside ( a flat spring type clip that slides on).


----- Original Message -----
From: "Hanlon, Bill" <Bill.Hanlon@COMPAQ.com>
To: "oletrucks" <oletrucks@autox.team.net>
Sent: Friday, April 14, 2000 3:25 PM
Subject: [oletrucks] Disk brake problem

> I am in the process of installing a front disk brake kit on
> my (according to VIN plate) '57 GMC 1/2 ton.
> The "frame end" of front drum brake hoses currently on the
> truck mount to the frame by passing through the frame and
> having a 5/8" nut attach from the inside of the frame.  So
> the "frame end" of the hose is threaded on the outside to
> accept this nut as well as on the inside to accept the male
> metal brake line (3/16 NPT if I remember right) that comes
> from the master cylinder.
> The replacement hoses sent by my supplier of the
> brake kit have only the inside thread.  The kit claims
> to be for a 47-59.  When I asked the supplier to
> look at one of his regular drum type replacement
> hoses for a 57 he says the "frame" end is identical
> to the disk brake hose.  However, when he pulled a
> drum brake hose for a 55-2 through 56 the "frame"
> end of the hose was like the one on my "57".
> Have any of you installed disk brakes on the front of
> a 55-2/56 with any luck?  If so, did you run into this
> problem?  If so, what did you do about it?
> Could one of you with 57-59 trucks take a look at
> the manner of attaching the front brake hose to the
> line coming from the master cylinder?  Is there some
> kind of brass fitting inside the frame that somehow
> bolts to the frame to prevent the hose from rattling
> around?  Please describe the connection from the
> front hose to the rest of the system.
> As always, thanks for your expertise.
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959

oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959

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