1985 Chevy Truck Brake Proportioning Valve




1985 Chevy Truck Brake Proportioning Valve

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    1985 Chevy Truck Brake Proportioning Valve

    1985 Chevy Truck Brake Proportioning Valve

    I then put a bottle bleeder ion the raised up bleeder and pumped the pedal about 4 times untill the bottle was full and repeated for the other side. This proportioning valve is a great choice for your disc front brakes and drum rear brakes! Find More Posts by jhow Left Mount Zinc Proportioning Valve. Find More Posts by cdowns.

    1985 Chevy Truck Brake Proportioning Valve

    1985 Chevy Truck Brake Proportioning Valve

    1985 Chevy Truck Brake Proportioning Valve

    1985 Chevy Truck Brake Proportioning Valve

    1985 Chevy Truck Brake Proportioning Valve

    Register or Log In To remove these advertisements. I have replaced all the brake parts and after gravity bleeding it all I started it up and the first push on the brakes turned on the great light we all like to see.

    I checked the reset button and it was not poped out so I tried the bleeder on top of the Prop valve and alot of fluid came out but now I get nothing out of any of the wheels.

    1985 Chevy Truck Brake Proportioning Valve

    Whats going on with this thing. It is a 70 with disk brakes and I have no idea if it is the right valve. Any input would be great. I had the same problem before. PS, my above post is taking into account you DID bench bleed the master. I did bench bleed the master, gravity bleed and can bleed all four corners and had a good pedal. I then fired it up and hit the brakes and the light came on. I checked the pop out button and it was not poped so I had my wife pump and hold the pedal while I cracked the bleeder on top of the pictured Prop.

    It bleed out like a normal bleeder does but then that was it for any fluid out of any corner. It was on the truck when I got it and so were the front disk so I have no info on what they were off of or what parts were left un touched.

    1985 Chevy Truck Brake Proportioning Valve

    Last edited by Rokcrln; at See if this will help: Find More Posts by jhow This is a picture of the correct por. Is the booster ok. Kevin, I had the same issue recently with a new disc brake conversion on my 70' truck. I was worried because the light came on after the install. I drove down my street nice and easy and "tapped" the brakes a few times and heard a "pop" which was the valve recentering itself and the light went out. I've seen posts on here to slam on the brakes but I didn't have to do that.

    I think you need to take it for a spin and let the weight of the truck coming to a stop recenter the valve. Find More Posts by 70c Originally Posted by cdowns. Well I got so fed up with this last night that I puled off the booster and put on another one I had and did the same with the master. I pulled the psi switch out of the Valve and re-centered it but it keeps flipping and shutting off the rear brakes.

    I even tried holding the valve inplace while bleeding and still nothing. I tried holding in the pin thingy while doing it but nope nothing still. When I hold the valve centered I get fluid out o the rear but as soon as I try it with out holding the valve it flips I am temped to pull the P-valve and just run an adjustable to the rear if I can not figure this thing out.

    1985 Chevy Truck Brake Proportioning Valve

    I pulled the rear drums off and made sure they were not leaking and that the shoes were up tight to the drums and every thing looks fine back their. We have all the air out and have flowed a few bottles of fluid thru the system. The worst part is I know what I am doing but I can't figure it out. I even went as far as finding my old chassies and brake books from school 20yrs ago and re-read them for what I was missing and still nothing.

    Have you replaced the rear brake hose? I'm just throwing a guess out there but poor flow thru that hose "may" make the prop valve act up. You can't fix stupid,not even with duct tape. Originally Posted by PanelDeland. I had them mixed up. I went to look at one and you have them right.



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