| Re: [GMCnet] Correct (and hopefully NON-leaking) brass combination valve? [message #358697 is a reply to message #358696] |
Wed, 16 September 2020 17:51   |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
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Senior Member |
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My belief in 2007 was that the combination valve had only three functions:
1. Hold off activation of the front disc brakes until 135 psi of line
pressure activated the rear drums. 2. Activate the differential pressure
switch if one system lost pressure; and, 3. Provide a convenient place for
all the plumbing to come together. My subsequent experience has seemed to
verify that, so I don't know what more a disc/disc valve does -- can
someone enlighten me? If there's not another function, perhaps more folks
will want to merely "rebuild" and modify their OEM disc/drum valve IAW this
example:
http://www.gmcmhphotos.com/photos/g3510-deciphering-the-combination-valve.html
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, Troy-Bilt APU, etc., etc., etc.
www.gmcwipersetc.com
On Wed, Sep 16, 2020 at 6:26 PM Larry Engelbrecht via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Thanks to all for the advice. I did order one from Highway Stars. Not
> cheap, but I hate redoing things so that peace of mind alone makes it worth
> the
> price.
> --
> Larry Engelbrecht
>
> San Diego, CA
>
> '73 26' ex-Glacier
>
> TZE063V100319 03/07/73
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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