If the pistons in the dual MC are the same diameter (many are)
a proportioning valve would not be needed.
It probably isn't a bad idea to change out 50+ year old
brake lines just for safety's sake (that is why you are
changing to the dual MC), but standard size stock brake
lines can be used until you get near the MC. At that point
rummage through the brass fittings bins at your FLAPS
to find whatever size adapters you need to get the
stock lines connected to the new MC. Just remember that
brake lines use an inverted flare and so should whatever
fittings/adapters you use. You will need a tubing cutter
and a flaring tool capable of making inverted flares.
Buy a couple of straight sticks of brake line from your
FLAPS to practice making the inverted flares before
attempting the real thing.
-----Original Message-----
From: mfeaster@ticnet.com [mailto:mfeaster@ticnet.com]
Sent: Thursday, September 14, 2000 11:04 AM
To: Hanlon, Bill
Cc: 'Armijo, Manuel L'; oletrucks@autox.team.net
Subject: Re: [oletrucks] non-power dual master cylinder?
Do you need a proportioning valve for a all drum brake system? and I guess
I need to run all new brake lines to adapt to a dual MC.
thanx, GB
Hanlon, Bill writes:
> I have such a system on my 57 GMC. Got the disk adapters, master
> cylinder and bracket from Heavy Chevy. They mistakenly shipped me
> the bracket for their POWER master cylinder first. After getting
> the correct bracket the installation went fairly well. The master
> cylinder is a Wagner part. Heavy Chevy marked out the part number
> on the box, but the next time I think about it I plan to read the
> number off of the master cylinder and look it up in my FLAPS'
> Wagner manual to see where it came from.
>
> A number of people have told me that installing a POWER master
> cylinder in the stock location is a real trick IF you don't have
> an automatic transmission. Most brake boosters are large enough
> that they will interfere with the clutch linkage.
>
>
> -----Original Message-----
> From: Armijo, Manuel L [mailto:manuel.l.armijo@intel.com]
> Sent: Wednesday, September 13, 2000 12:18 PM
> To: oletrucks@autox.team.net
> Subject: [oletrucks] non-power dual master cylinder?
>
>
> This message is in MIME format. Since your mail reader does not understand
> this format, some or all of this message may not be legible.
>
> ------_=_NextPart_000_01C01DA6.8E6A4640
> charset="iso-8859-1"
>
> Well, after a long debate with myself, and a whole tablet of sketch
> drawings, I've decided on a brake system for my '50 chevy 1/2 ton....rear
> drums (73 chevy wagon), and front disc conversion kit. My question is,
does
> anybody have any experience, or know of a good NON-POWER master cylinder
> that would compliment the system? I vaguely remember my first car, it was
a
> late 60's model with a non-power dual master cylinder and it worked pretty
> good, at least I don't remember complaining about it. I found this
bracket,
> and I think it's the "easiest and cheapest" way to go for now, with a
> non-power dual master cylinder. Thanks for the feedback.
> Manny. <<brake-bracket47-54.jpg>>
>
Gary Brignac
55.2 3100
Fort Worth, TX
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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