no rear brakes and hard pedal?

[70396CST10]

Hello all:

I have front disk brake with power brakes..

I was doing maintenance on my new project Saturday and went to check the fluid in the MasterCylinder and the fluid was very low in the front and there was no fluid in the rear.. I added fluid and tried to bleed the rear but no fluid comes out at the back... Front bleeds fine..

Brake pedal is hard and the brakes do not work very well.. The front wheels will not lock up..

How can the brakes work if there is not fluid in the rear? Wouldn't the pedal go to the floor? Is the prop. valve stuck or something?

Thanks in advance..

James..

oh yeah,

I did a search..

Thanks again..