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Home » Public Forums » GMCnet » Problem with brass body proportioning valve (Read about it in Winter 2021 Vintage RVing)
Re: Problem with brass body proportioning valve [message #367179 is a reply to message #365293] Tue, 12 October 2021 14:59 Go to previous message
ebyker is currently offline  ebyker   Canada
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Registered: May 2016
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Dave Lensy in the aetical in vintage rv magazine showes 2 ways to modify the pv2 valve I removed the rear screw in part in place on the coach I thought that it was easy to remove the small diameter extention as as I had it in my hand I left the rubber valve in place as you read in my earler post I had great brakes however what I found out the hard way there was considerable pressure being held in the rear brakes In the next 12 hours of use this summer I burned off all 4 rear brakes I have since replaced the rear shoes and springs there was enough pressure in the rear brakes that when I lossened a brake line there was a big spurt of fluid way more than anyone would expect I have now removed th rubber valve as well All seems well on the last trip Now on the recomenddation ov a local brake rebuild shop I had a 10 psi line pressure valve in my rear brake line [ sinse removed] I was told that rear line pressure valve was part of the function of the combination valve but I do not see anything in the vlave or in the vareous descriptions of a line pressure fuction [ old 4 wheel drum master cylinders had that fuction in the master cyl] where is that line pressure vlave now or do we not need it and why not thanks Eelko Byker Port Colborne Ont Canada
 
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