Master Cylinders are NOT all same size.....the piston diameters vary from
about 7/8" to 1-1/8" for cars and light trucks to 1-1/4" to 1-1/2" for the
Medium and HD trucks. It takes a lot more volume of fluid to move all of
those large wheel cylinders in the big trucks.
I would look for a donor truck with the same GVW rating. Many trucks even
into the 70's still had single pot M/C's with Hydrovac's.
Let us know what you find!
Mike Boteler
'56 8400 Wrecker
Hughesville, Maryland
----- Original Message -----
From: "G. Simmons" <gls@4link.net>
To: <NTemple46@aol.com>; <oletrucks@autox.team.net>
Sent: Wednesday, October 25, 2000 2:39 PM
Subject: Re: [oletrucks] Master Cyl. for Big truck
>
>
> >This whole dual master cylinder has me thinking it would be a safe thing
to
> add while working on my truck. My question is this. What should I
consider
> if I decide to go dual on my 2-ton truck? Would it be any different that
a
> 1/2 ton other than size of cylinder? What might be a good donor vehicle?
>
>
> Neil, as long as the replacement were at least as big in diameter and
plunge
> depth as your original m/c, you shouldn't have a problem. I don't know
the
> size of the original m/c for two ton, but I'll bet it wasn't any bigger
than
> a mustang, camaro or corvette m/c.
>
> Those cars may have been lighter, but they were made to go a lot faster.
If
> I'm wrong, just plan a field day at the junk yard, looking at the trucks
and
> big cars for a match to the bracket you get or make.
>
> I just picked up an m/c and 7 inch double booster from a late 70s Gran
> Torino. God, what an ugly car. But it had a great set of brakes, even
with
> a bleeder built into the m/c. Cleaned up real nice, and looks brand new
> inside the cyllinder. Not bad for $20. Had to pull it myself, but since
it
> was mounted right under the hood, it was easy.
>
> Regards,
>
> Grant
>
> 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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