So I am having quite the time trying to bleed the brakes and I am posting up to see what I am failing at.
Background-car is a 1979 Country Squire so no ABS. Replaced all of the rear brake lines right to the wheel cylinders. Replaced the soft line as well.
The original distribution block/proportioning valve or whatever we call it was full of dirt and seized up so I replaced it with one from the 85 CV in the local picky pull.
Underneath all the dirt and road grime it was full of actual brake fluid and cleaned up fine.
Also replaced the hard lines from the master cylinder as the originals were rounded off and had seized fittings.
So the problem is I can't get any brake fluid to the rear brakes. I have tried pumping them up and holding them but the rear brakes spin freely but the fronts lock up and only release when I crack the bleeder screws (one good thing-none are seized). I use a vacuum pump to bleed them but nothing except residual drops.
Tried gravity bleeding and nothing flows. And I did remove the stop switch and put in a stopper to keep the shuttle valve in place.
From what I understand is the valve assembly does two jobs-proportioning brake fluid to front and rear and a pressure regulator.
This is the original stripped down aluminum one from my car. Gives you an idea of the one I replaced it with.
So there is a button under the rubber cover on the back. My understanding is it is a bleeder rod. Bleeder indicates it may have something to do with bleeding.
Is it a reset button of some kind? Do I press it in or pull it out when bleeding brakes? I have seen pics of vehicles that have a tool that either pulls or depresses and holds the rod while bleeding. Example...
I have bleed brakes countless times but this has me stumped. It is like something is keeping the fluid from flowing but except for the brake cylinders everything in the rear has been replaced.
Advice?
Background-car is a 1979 Country Squire so no ABS. Replaced all of the rear brake lines right to the wheel cylinders. Replaced the soft line as well.
The original distribution block/proportioning valve or whatever we call it was full of dirt and seized up so I replaced it with one from the 85 CV in the local picky pull.
Underneath all the dirt and road grime it was full of actual brake fluid and cleaned up fine.
Also replaced the hard lines from the master cylinder as the originals were rounded off and had seized fittings.
So the problem is I can't get any brake fluid to the rear brakes. I have tried pumping them up and holding them but the rear brakes spin freely but the fronts lock up and only release when I crack the bleeder screws (one good thing-none are seized). I use a vacuum pump to bleed them but nothing except residual drops.
Tried gravity bleeding and nothing flows. And I did remove the stop switch and put in a stopper to keep the shuttle valve in place.
From what I understand is the valve assembly does two jobs-proportioning brake fluid to front and rear and a pressure regulator.
This is the original stripped down aluminum one from my car. Gives you an idea of the one I replaced it with.
So there is a button under the rubber cover on the back. My understanding is it is a bleeder rod. Bleeder indicates it may have something to do with bleeding.
Is it a reset button of some kind? Do I press it in or pull it out when bleeding brakes? I have seen pics of vehicles that have a tool that either pulls or depresses and holds the rod while bleeding. Example...
I have bleed brakes countless times but this has me stumped. It is like something is keeping the fluid from flowing but except for the brake cylinders everything in the rear has been replaced.
Advice?
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