There is no proportioning valve in any drum brakes. This is simply a basic brass block with a provision for the brake warning light switch and the brake lines. Unless you are useing a brake conversion from a car that had a proportioning valve you just leave the block in and don't use a valve. The 78 & 79 Concord's my friend had did not have a proportioning valve. The 78 was a power brake car and the 79 was a non power brake car. I parted out the 79 and used it's disc brakes on my 74 Hornet with the power drum brake booster. I did however plumb in an adjustable aftermarket proportioning valve in before swapping in the discs. I had it set in the middle so the drum brakes worked fine till I swapped to the disc's in which turned out to be 2 year's later. And then I did not have to adjust it even after the disc's were installed. I made a couple of panic stops and the rear brakes did not lock up so I left the valve'a adjustment alone. All the proportioning valve does is to keep the rear wheels from locking up on a panic stop due to the different amount of pressure required to activate the disc's & drums. Maybe one of the reasons my brake swap works so well is along with the Concord's front disc's I also have the rear out of the same Concord installed. So I actually have the complete brake setup out of the Concord. The Concord rear had the bigger brake drums in the rear versus the original ones. "Doc"
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- From: twa1950@xxxx
- Date: Mon, 16 Aug 2004 20:25:34 EDT
I would bet the springs and piston are for the warning light. Since it has drum brakes all around I believe I would go to a hardware store and get me a brass T to replace it. I think you will be all right. Since I am no expert on brakes through you might want to see what the others say before you do it though. I would think though if it really is some sort of proportioning valve and you did what I suggested you would know it in a minute. Terry --part1_105.4e3b2eab.2e52aa7e_boundary Content-Type: text/html; charset=US-ASCII Content-Transfer-Encoding: 7bit <HTML> <FONT FACE=arial,helvetica><HTML><FONT SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">I would bet the springs and piston are for the warning light. Since it has drum brakes all around I believe I would go to a hardware store and get me a brass T to replace it. I think you will be all right. Since I am no expert on brakes through you might want to see what the others say before you do it though. I would think though if it really is some sort of proportioning valve and you did what I suggested you would know it in a minute. <BR> Terry</FONT> <br> </HTML> --part1_105.4e3b2eab.2e52aa7e_boundary--
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