| [GMCnet] Disable Metering Valve [message #298254] |
Mon, 28 March 2016 18:20  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
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We're just about finished with the conversion of my son Alan's middle and
rear brakes to discs. It's now time to disable the metering valve. I
disassembled and reported on the OEM combination valve back in '07:
http://www.gmcmhphotos.com/photos/g3510-deciphering-the-combination-valve.html
The project would be easy if that were the valve on Alan's coach. It's
not. Someone before us replaced it with this one:
https://www.dropbox.com/s/ydbrky0w19s34jg/Alan%27s%20Combination%20Valve.jpg?dl=0
The combination valve is obviously still at the forward end of this one,
like the iron OEM version. However, where the OEM had a big (3/4"?) nut
retaining it, this one is much smaller (7/16"). The OEM version required
considerable force to extract the metering valve, but I wasn't concerned
about damaging it when I disassembled it. I didn't mind manhandling it.
This time, I'd like to avoid damaging anything, so I'm asking for help:
Has anyone disassembled one of these valves? If so, how do I extract the
metering valve so I can throw it away and seal its push pin hole? Does it
just pull out, like the old one? Or is there a hidden retainer which I
can't see without removing the whole thing (if you look at the condition of
the 5 brake lines in the photo, you'll see why I don't want to do that)?
Any help appreciated.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc., etc.
www.gmcwipersetc.com
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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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