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04-06-2005, 01:14 AM | #1 |
Registered User
Join Date: Dec 2003
Location: Beaverton, OR
Posts: 49
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HELP!!! Disc proportioning valve question
Hey guys I need some help. I have a drum/drum valve on my truck, but have upgraded to discs in the front. I got a new disc/drum valve from a 76 chevy truck, looks like this:
It does not appear to have the correct amount of ports (1 extra), or doesn't seem to be a direct bolt in. I think it's because it is a "combination valve" that has metering built in. Anyways, please tell what ports are for what. thanks!
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1969 Chevy 1/2T SWB w/515HP 383, Viper 6 speed (.50 OVERDRIVE BABY!), 3.73 POSI rear 1965 Mustang w/367HP 289, 5 speed, 4.11 coming |
04-06-2005, 07:51 AM | #2 |
Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
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from left to right, (top left) plug it, (middle) inlet from front master cylinder, (right) inlet from rear master cylinder,
Bottom left-front lines Bottom right-rear lines Thats how mine is and I have the same valve as pictured.....
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71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 69 C30 Former Motor Home, Flat Bed time |
04-06-2005, 08:25 AM | #3 |
Weekend Warrior
Join Date: Oct 2004
Location: CT
Posts: 1,787
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Sounds right to me.
the front 2 - angled toward the front and the lower one go to your front lines, 1 to the Right and 1 to the left. I guess it would work if you plugged the top one...never thought about it.
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-'07 GMC Sierra K2500HD -'66 C10 Suburban -'68/'71 K20 Service Bed Project -'69 Chevy C30 Mason Dump -'33Ford P/U 396ChevyPowered |
04-06-2005, 03:14 PM | #4 |
Registered User
Join Date: Dec 2003
Location: Beaverton, OR
Posts: 49
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I think maybe in 1976 there is a separate line for left and right, but in 69, there are only two lines, 1 back 1 front.
71meangreenc10, thanks for the info, so on your truck the rear drums are connected to the big "adapter" looking thing in the back? It's a pretty big port, did you have to get another connector for it? Any pics?
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1969 Chevy 1/2T SWB w/515HP 383, Viper 6 speed (.50 OVERDRIVE BABY!), 3.73 POSI rear 1965 Mustang w/367HP 289, 5 speed, 4.11 coming |
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