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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 #365803 is a reply to message #365770] Sat, 31 July 2021 21:19 Go to previous messageGo to previous message
Jp Benson is currently offline  Jp Benson   United States
Messages: 649
Registered: October 2011
Location: Fla
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In many past threads anyone who referred to the "proportioning valve" was quickly reminded that it was in fact a combination valve. This current thread implies that vendors may have been unwittingly selling proportioning valves. It would be surprising if that were true. Should I check mine that was purchased from a vendor several years ago? I'm not inclined to open up the hydraulic brake lines.

Normally a proportioning valve is used for a disc/drum setup with two rear wheels. Perhaps GM engineers decided on the combination valve with higher pressure to supply the required volume of fluid to four wheels. It would have been simple enough to test both ways.

JP
 
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