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Showing results for tags 'porportioning valve'.
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1970 240Z Front brakes are good no air in the system (toyota 4piston). Back: Nissan Maxima disk. Had to rebuild driver side rear due to leak. Went to bleed get no pressure to both rear calipers and not much flow. When cracking the rear bleeder, the brake pedel does not go to the floor it stays the same. When Bleeding the front it does go to the floor. Got some people helping me out and this is what we think might be going on. 1. porportioning valve locked out the rear when it was leeking. I have opened the electrical part on the top to get a look at the valve. Not sure what way it should be, at this point the small diameter part is at the firewall and the larger is just in view at the front. 2. Front part of the master cyl not working (1980 280zx master) on the 280zx it is opposite the original 1970 master cyl. So the front feeds the rear brakes. Tryed to bleed the front to push the valve back in place. Did't work. Could have hydralic lock working against the rear keeping the fluid locked out of the rear. I don't have the diagram of the distribution valve to see how the lock out part works. All my books in storage. At this point I only have front brakes. Anybody run into this before? Need some help/suggestions.
