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Home » Public Forums » GMCnet » Problem with brass body proportioning valve (Read about it in Winter 2021 Vintage RVing)
[GMCnet] Re: Problem with brass body proportioning valve [message #365766 is a reply to message #365765] Thu, 29 July 2021 15:30 Go to previous messageGo to previous message
Billy Massey is currently offline  Billy Massey   United States
Messages: 916
Registered: January 2004
Location: Central Texas
Karma:
Senior Member
Thanks for this news, Tom. I'm so glad that there people constantly
working in the background for our safety.
Jim is to be commended for always having our backs. I hope to be one of
the first adopters in support of his business.

bdub


On Thu, Jul 29, 2021, 2:40 PM Thomas Pryor wrote:

> Well again Thanks to Dave Lenzi, he created the need for more knowledge on
> what happened with the replacement Brass combination valve for our
> coaches.
>
> In a previous life I worked for Kelsey Hayes ABS group as quality "Grunt"
> Foundation brakes knowledge was available to me. So I decided to swim
> upstream and found out that a brass replacement valve for our coaches WAS
> DEVELOPED and put on an engineering drawing. The Code name was PVMH, who
> knew!
> That engineering drawing resurfaced in China and Jim Kanamota has been
> provided with the manufacturer name /contact info. He is negotiating a MOQ
> (Minimum Order Quantity) . I have been assured that all valves will be
> function tested before shipment from the China factory.
>
> MY FINAL THOUGHTS;
> 1. You can modify the PV2 valve to eliminate the pressure limiting to the
> rear brakes. Your option, your risk!
> 2. If you have the original KH86702 Cast Iron Valve.( no rear pressure
> reduction) Flush the brake fluid per the GMC maintenance manual, It may
> look ugly on the outside and perform all required tasks admirably.
> 3. If you ever have to replace the Combination valve make sure it is a
> PVMH.
>
> If you want to follow my investigative /archival information please see:
>
> http://www.gmcmhphotos.com/photos/combination-valves/p68277-gm-valve-autopsy.html
>
> --
> Regards,
>
> Tom Pryor
> 4188 Limerick Dr
> Lake Wales, Fl 33859
> Cell 248 470 9186
>
> 1977 23'B named "CASPER", HARDLY ORIGINAL, (455 EFI) (Pwr. Drive)
> (tailgate) (rear bunk beds)
> (Webasto petrol boiler) (MB Elect fan clutch) (Brake reaction arms) BUT
> STILL A WORK IN PROGRESS!
>
> ReplyForward
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bdub
bdub.net

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