Hi Guys,
I have exhausted my knowledge on brakes. I have a 1950 1/2 ton that I installed the POL disk conversion on the front axle. I also installed their dual master cylinder. Prior to installing the MC is did the bench bleed with the tubing fittings that came with the kit. I used the centering tool to ensure that the proportioning valve is centered with the switch removed.
The pedal goes to the floor with no pressure. I tried the one person vacuum bleeding but that has never worked for me, on any of my vehicles. I did the two person bleed, three pumps and then hold (this has always worked). I made sure the reservoir did not run dry. That did not work, the pedal still goes to the floor. My wife was doing the pressing of the pedal and she said she felt an increase of pressure when she was pumping the pedal but after closing the valve, the pedal to me did not feel like there was pressure and it still went to the floor.
Today I installed some of the Russell check valve bleeders on the rear and bled the drums by myself but the pedal still went to the floor.
The next thing I will try is the remounting the bracket of the MC. There are two sets of holes and one set will move the MC closer to the pivot but I think I have it correct per the instructions. This will shorten the stroke, I think. It is only about 1/2 of distance to the next set of hole so it is not much.
Anyone do this conversion and can tell me what I am doing wrong?? Do I have to re-bleed the MC? there seems to be zero pressure on the pedal.
thanks
skipper
Last edited by rc356s; 08/30/2019 3:19 AM.
