Was just same as you have. Didn't catch GMC part at first. Would think it's
similar anyway. I have a 50 and 52 Big truck book (shop) but they are
usually diff than the 2-ton or smaller ones. On my 50 COE GMC, the M/C was
accessed under the seat and set quite a ways back from Chevs I've had. It
had same M/C, just set way back and had extra long push rod to it. Shouldn't
make a difference on how it works. Now, the leverage you get from linkage
hook-up positions may change something, maybe different "ratio" or so from
old to new MC? Bore of MC makes a diff on systems too. Is it similar bore as
orig? Shouldn't make diff on return tho, I wouldn't think.
G. L. Perry
Huntington, IN 46750
glperry@fwi.com
Big AD trucks, COE
MM tractors and 1 Oliver!
----- Original Message -----
From: "Steve Hanberg" <Steve@OldSub.com>
To: "Gary Perry" <glperry@fwi.com>
Cc: <oletrucks@autox.team.net>
Sent: Saturday, November 30, 2002 8:29 PM
Subject: Re: [oletrucks] Brake return spring
> I have the "Assembly Manual" for a '54 Chev, and this is a '55 GMC, but
I've
> never found one for the GMC, so mostly I relay on the '54 book.
>
> Does your book cover '55 1st GMC specifically?
>
> I have cleaned and greased the pivot, and that didn't seem to make any
> difference. The new master is closer to the center of the truck, and I do
> think its changed things a bit. I had not thought about the body mount,
and
> the possibility that it has sagged. I'll look at that tomorrow.
>
> Thanks!
>
> ----- Original Message -----
> From: "Gary Perry" <glperry@fwi.com>
> To: "Steve Hanberg" <Steve@OldSub.com>; <>
> Sent: Saturday, November 30, 2002 2:25 PM
> Subject: Re: [oletrucks] Brake return spring
>
>
> > Do you have an "Assembly Manual" for yours? They show pix of linkage and
> > etc. Most of those springs aren't very strong, usually have long leads,
> and
> > even little wire links to add to length. They may hook on a frame
bracket
> > that has upper and lower holes in it, or may just hook into frame holes
on
> > top. Try yours in holes farther toward front to give more tension. I
could
> > look in my manual and send a scan of pix if you would like. Be warned,
> most
> > aftermarket ones at vendors will have one end long and straight, you
have
> to
> > bend hook, and it is Hard to bend! Most in hardware stores won't have
> long
> > ends and will have spring in way of connecting to anything in my
opinion.
> > Have you checked the condition of the pivot bushings on pedal shafts?
> Maybe
> > with new pressures from M/C they are moving to new spots on bushings and
> > binding? Maybe just a good geasing there may help. There is a zerk
between
> > the pedal pivots under gunk maybe. Also, if your body mount has gone
bad,
> > and cab settled, it will rub on pedal shafts and cause binding and
> > squeaking/scraping noises.
> >
> > G. L. Perry
> > Huntington, IN 46750
> > glperry@fwi.com
> > Big AD trucks, COE
> > MM tractors and 1 Oliver!
> >
> > ----- Original Message -----
> > From: "Steve Hanberg" <Steve@OldSub.com>
> > To: <oletrucks@autox.team.net>
> > Sent: Saturday, November 30, 2002 4:36 PM
> > Subject: [oletrucks] Brake return spring
> >
> >
> > > The brake pedal on my '55 1st doesn't consistently return all the way
to
> > the
> > > top. I've lubricated the mechanism, and it should work, but just
> doesn't
> > seem
> > > to make it about half the time.
> > >
> > > The return springs (yes, there are two) do not look like the pictures
in
> > the
> > > assembly manual. I'm about to head to the hardware store to see what
I
> > can
> > > find, but I'm wondering if anyone knows what I should be looking for?
> > >
> > > I've just completed converting to a dual master cylinder, and wonder
if
> it
> > > might be part of the problem, but nothing is rubbing on anything, and
> the
> > > adjustments fit the specs.
> > >
> > > Steve@OldSub.com
> > > 1954 Chevrolet 3100
> > > 1955 1st GMC Suburban
> > > 1972 Cheverol C-10
> > > www.OldSub.com
> > > 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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