Re: A Body disc brake swap - proportioning valve.
[Re: RapidRobert]
#1412255
04/01/13 04:24 PM
04/01/13 04:24 PM
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Joined: Mar 2003
Posts: 4,930 Tri-Cities, Washington
VITC_GTX
OP
master
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OP
master
Joined: Mar 2003
Posts: 4,930
Tri-Cities, Washington
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Quote:
Quote:
I did remove the rear flex hose and blew compressed air through it. It seemed to have no restrictions at all. I'm wondering if my splitter/proportioning valve is where the blockage is
Next step would be to unscrew the rear line male fitting from the splitter & hit the brake & see what you get for volume (It'd be good to have a piece of brake line to screw in the block to contain the mess into a jar). If restricted then unscrew & check the line in front of the splitter & if still bad that would point to the M/C half & if good there ahead of the splitter then there's a restriction in the splitter. Holler how it goes. I'm thinking M/C
Yeah, I'll break the line loose and see what I find. How much fluid should I expect to come out, tablespoon?
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Re: A Body disc brake swap - proportioning valve.
[Re: VITC_GTX]
#1412258
04/03/13 12:37 AM
04/03/13 12:37 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I wonder if the pop was in the rear drum area. Grab a helper see if you can get it to pop again
live every 24 hour block of time like it's your last day on earth
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Re: A Body disc brake swap - proportioning valve.
[Re: nomore65BelvJim]
#1412261
04/04/13 03:00 PM
04/04/13 03:00 PM
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Joined: Mar 2003
Posts: 4,930 Tri-Cities, Washington
VITC_GTX
OP
master
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OP
master
Joined: Mar 2003
Posts: 4,930
Tri-Cities, Washington
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Quote:
Quote:
How can I tell if I have a splitter or a proportioning valve?
The one in my hand is drum/drum, the one mounted to the frame rail is disc/drum. 72 A body.
Well, I was wrong...again . I do have the drum/drum block that you show. I also think I found another issue. One of my wheel cylinders seems to be froze. I can hit the brakes with the hub off and it doesn't move but I have fluid at the wheel cylinder.
More to come...
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Re: A Body disc brake swap - proportioning valve.
[Re: VITC_GTX]
#1412262
04/05/13 01:28 AM
04/05/13 01:28 AM
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Joined: Dec 2003
Posts: 16,844 Phoenix - surface of the sun
nomore65BelvJim
I Live Here
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I Live Here
Joined: Dec 2003
Posts: 16,844
Phoenix - surface of the sun
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Quote:
Quote:
Quote:
How can I tell if I have a splitter or a proportioning valve?
The one in my hand is drum/drum, the one mounted to the frame rail is disc/drum. 72 A body.
Well, I was wrong...again . I do have the drum/drum block that you show. I also think I found another issue. One of my wheel cylinders seems to be froze. I can hit the brakes with the hub off and it doesn't move but I have fluid at the wheel cylinder.
More to come...
Replace both wheel cylinders, they are cheap. Also get the disc/drum block.
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Re: A Body disc brake swap - proportioning valve.
[Re: Rhinodart]
#1412264
09/19/14 10:11 AM
09/19/14 10:11 AM
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Joined: Jun 2014
Posts: 1,331 VA
dragon slayer
pro stock
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pro stock
Joined: Jun 2014
Posts: 1,331
VA
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Quote:
On factory single piston disc brake set-ups there are two valves, the distribution block and a metering valve for the rear brakes. The metering valve is just downline of the distribution block. A lot of people just use an adjustable valve.
Actually can be 3 also, and the rear valve is not a metering valve.
The distribution block feeds front metering valve for the front calipers. It also feeds a line to the rear proportioning valve that lowers the pressure to the rear drums. The meter valve is also called the hold off valve and delays applying pressure to the front brakes until the rear start grabbing.
Later mopar used a single combined valve with all the pieces in one.
Not sure if this was ever fixed, but sounds like MC secondary piston sticking. That is the piston that applies pressure to rear brakes. That would explain poor brakes and also not allowing pressure to bleed off when applied. G
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