[DeTomaso] Brake question

[Tomas Gunnarsson]

Please share what part # and brand that is Rob.

Tomas

-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of Rob Dumoulin
Sent: den 13 maj 2012 11:46
To: Julian Kift
Cc: De Tomaso List; pantdino at aol.com; jb841 at cox.net
Subject: Re: [DeTomaso] Brake question


The front and rear are isolated within the adjustable (modern and much
smaller) proportioning valve which also has a brake light switch built in.
On May 13, 2012 12:15 AM, "Julian Kift" <julian_kift at hotmail.com> wrote:

>  That is exactly why I am asking, I think generally for the new owner
> there might be some confusion out there over the 'shuttle' and
> 'proportioning' valves and someone might be tempted to 'gut' the shuttle
> valve instead of the proportioning valve. That would be bad as it connects
> all brake lines a singular system, but might explain why Rob lost all
pedal
> when the fluid boiled.
>
> Julian
>
> ------------------------------
> To: julian_kift at hotmail.com; rob at dumoulins.net; jb841 at cox.net
> Subject: Re: [DeTomaso] Brake question
> From: pantdino at aol.com
> CC: detomaso at realbig.com
> Date: Sat, 12 May 2012 23:48:06 -0400
>
> The only purpose of a shuttle valve is to trigger the brake warning light.
> It's not really a valve.
> If it is removed the front line going into it should be connected to the
> front line exiting it and rear to rear, as if the thing never existed.
>
> If someone mistakenly puts a T fitting in or fiddles the shuttle to make
> it act like one, you no longer have separation of the front and rear
> braking systems and a leak anywhere will result in no brakes at all.
>
>
>  -----Original Message-----
> From: Julian Kift <julian_kift at hotmail.com>
> To: rob <rob at dumoulins.net>; jb841 <jb841 at cox.net>
> Cc: De Tomaso List <detomaso at realbig.com>
> Sent: Sat, May 12, 2012 8:32 pm
> Subject: Re: [DeTomaso] Brake question
>
>
> I'm trying to picture how you brakes are plumbed, normally a proportioning
valve
> is in a singular line (typically rear, but stock on the Pantera is front)
adn it
> limits the flow in that line.
>
> When the shuttle valve was removed how were the lines connected together?
>
> Julian
>
> > Date: Sat, 12 May 2012 20:53:36 -0400
> > From: rob at dumoulins.net
> > To: jb841 at cox.net
> > CC: detomaso at realbig.com
> > Subject: Re: [DeTomaso] Brake question
> >
> > Shuttle valve is removed. Circuits isolated with a modern proportioning
> > valve.
> > On May 12, 2012 1:16 PM, "John Buckman" <jb841 at cox.net> wrote:
> >
> > > >>>I no longer have the shuttle valve installed, it that matters.
> > >
> > >
> > > Rob,
> > >
> > > The shuttle valve also incorporates the brake light switch.  If the
> > > shuttle valve were removed,
> > > the brake light switch would have to be plumbed back into the
hydraulic
> > > line or a mechanical
> > > switch would need to be added to the brake pedal.
> > >
> > > If the shuttle valve were removed, and the brake lines were all
connected
> > > together instead of
> > > "splitting" the hydraulic system (which is what the shuttle valve
"block"
> > > does), then any problem
> > > in the hydraulic system (boiling of fluid or loss of fluid due to a
leak)
> > > would affect all four corners
> > > of the car, and would cause the brake pedal to go to the floor.
> > >
> > > John
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