[DeTomaso] FW: Brake Pressure Differential Valve

Joseph F. Byrd, Jr. byrdjf at embarqmail.com
Mon Jan 14 19:04:35 EST 2019


Oops, sorry Mike.  Meant to send to list

-----Original Message-----
From: Joseph F. Byrd, Jr. [mailto:byrdjf at embarqmail.com] 
Sent: Monday, January 14, 2019 19:04 PM
To: 'Mike Drew'
Subject: RE: [DeTomaso] Brake Pressure Differential Valve

Ain't that a Combination with the differential and propertial in one brass body?

I attached a cartoon of the pantera brake valves arrangement

-----Original Message-----
From: DeTomaso [mailto:detomaso-bounces at server.detomasolist.com] On Behalf Of Mike Drew via DeTomaso
Sent: Monday, January 14, 2019 18:36 PM
To: Joe Jaffoni
Cc: detomaso at server.detomasolist.com
Subject: Re: [DeTomaso] Brake Pressure Differential Valve

Joe,

No, no, a thousand times no. 

This is a disc/ drum proportioning valve. Pressure reduction to the rear circuit. ThenPantera has no pressure reduction. 

You need a Pantera valve. 

Mike

Sent from my iPad

> On Jan 14, 2019, at 15:22, Joe Jaffoni <427390 at gmail.com> wrote:
> 
> I've had this naming problem before...in any case, its the brass junction block just below the brake booster...Does anyone think this will work (with some minor bending of the brake lines and "adjusting" the mounting bracket:
> 
> https://www.ebay.com/itm/163424707842
> 
> 
>> On Mon, Jan 14, 2019 at 6:15 PM Mike Drew <MikeLDrew at aol.com> wrote:
>> Joe,
>> 
>> No. That is a proportioning (pressure reducing) valve. 
>> 
>> Mike
>> 
>> Sent from my iPad
>> 
>>> On Jan 14, 2019, at 3:06 PM, Joe Jaffoni <427390 at gmail.com> wrote:
>>> 
>>> Hi Mike - yes, I am talking about the the brass shuttle valve/junction block where the brake lines and the brake light switch connect.  Ironically, the first one I had in the car was bad so Ron McCall was kind enough to send me another one.  That's the one I had rebuilt by Muscle Car research and which is now leaking badly from the port where the brown brake pressure differential switch screws into.  Does anyone think this one will work (with some bending of the brake lines and re-working the mounting):
>>> 
>>> https://calponycars.com/1964-1973-classic/191-bra-653-041.html    
>>> 
>>> 
>>> 
>>> Joe,
>>> 
>>> I had one I sold to Larry Stock years ago. He has several I think. 
>>> 
>>> To be clear, you are talking about the shuttle valve/junction block where several brake lines and the brake light switch connect, not the pressure reduction valve in the front brake circuit. 
>>> 
>>> Mike
>>> 
>>> Sent from my iPad
>>> 
>>>> On Mon, Jan 14, 2019 at 5:47 PM Mike Drew <MikeLDrew at aol.com> wrote:
>>>> Joe,
>>>> 
>>>> I had one I sold to Larry Stock years ago. He has several I think. 
>>>> 
>>>> To be clear, you are talking about the shuttle valve/junction block where several brake lines and the brake light switch connect, not the pressure reduction valve in the front brake circuit. 
>>>> 
>>>> Mike
>>>> 
>>>> Sent from my iPad
>>>> 
>>>> > On Jan 14, 2019, at 14:43, Joe Jaffoni <427390 at gmail.com> wrote:
>>>> > 
>>>> >   I am getting close to the first post-resto drive and tried to bleed the
>>>> >   brakes this weekend but brake fluid is leaking out (heavily) from the
>>>> >   center of the port where the brown brake pressure differential switch
>>>> >   is screwed in.A  I previously had the valve rebuilt by Muscle Car
>>>> >   Research in Virginia which sells the rebuild kit...
>>>> > 
>>>> >   A
>>>> > 
>>>> >   From what Iave read, there should be no fluid at this "switch" port so
>>>> >   the leak indicates that the internal o-rings are allowing brake fluid
>>>> >   into that center port.A  I donat want to try to rebuild it again.
>>>> > 
>>>> >   Does anyone know where to get another one? Preferably new? Wilkinson
>>>> >   lists it ([1]https://panterapartsusa.myshopify.com/products/01316A) but
>>>> >   I tried Steve earlier and he is on vacation and I am trying to get the
>>>> >   replacement so I can spend the three day weekend replacing it and
>>>> >   cleaning up the brake fluid on the new carpet in the front trunk -
>>>> >   Thanks
>>>> > 
>>>> > References
>>>> > 
>>>> >   1. https://panterapartsusa.myshopify.com/products/01316A
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>>>> > 
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