[DeTomaso] Brake Pressure Differential Valve

Mike Drew MikeLDrew at aol.com
Mon Jan 14 18:15:19 EST 2019


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
>> > _______________________________________________
>> > 
>> > 
>> > Detomaso Email List is not managed by POCA
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>> 
-------------- next part --------------
   Joe,

   No. That is a proportioning (pressure reducing) valve.

   Mike
   Sent from my iPad
   On Jan 14, 2019, at 3:06 PM, Joe Jaffoni <[1]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):
   [2]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 severa
l brake lines and the brake light switch connect, not the pressure reduction val
ve in the front brake circuit.

Mike

Sent from my iPad

   On Mon, Jan 14, 2019 at 5:47 PM Mike Drew <[3]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 <[4]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][5]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. [6]https://panterapartsusa.myshopify.com/products/01316A
     > _______________________________________________
     >
     >
     > Detomaso Email List is not managed by POCA
     > Posted emails must not exceed 1.5 Megabytes
     > DeTomaso mailing list
     > [7]DeTomaso at server.detomasolist.com
     > [8]http://server.detomasolist.com/mailman/listinfo/detomaso
     >
     > To manage your subscription (change email address, unsubscribe,
     etc.) use the links above.
     >
     > Members who post to this list grant license to the list to forward
     any message posted here to all past, current, or future members of
     the list. They also grant the list owner permission to maintain an
     archive or approve the archiving of list messages.

References

   1. mailto:427390 at gmail.com
   2. https://calponycars.com/1964-1973-classic/191-bra-653-041.html
   3. mailto:MikeLDrew at aol.com
   4. mailto:427390 at gmail.com
   5. https://panterapartsusa.myshopify.com/products/01316A
   6. https://panterapartsusa.myshopify.com/products/01316A
   7. mailto:DeTomaso at server.detomasolist.com
   8. http://server.detomasolist.com/mailman/listinfo/detomaso


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