Is the fluid level dropping in the master cylinder? If yes then it may take more pumping to get fluid to the caliper, if no then there could be a problem with the master cylinder. If the master cylinder runs dry then it will need bench bled before you can do the cylinders at the wheels.

What was the original problem causing the calipers to be changed and how long did it sit apart before the new calipers were installed?

 

The last time that happened to me, BOTH front brake hoses were swollen shut.

Pop off the brake tube from the upper end of the brake hose and see what happens...

 

ok.

will try

Ron

 

OK...the verdict is in....

the winner is.......those damn hoses!!!! they were swollen shut!

so a trip to autozone and $25 later....brakes bleed....

thanks all for your help!

Ron