Brake bleeding, Nothing but air from rear brakes Options

[Medtner3]

Just rebuilt my rear calipers with seals from PMB Performance. Using a vacuum brake bleeder I started with the right rear caliper lower bleeder screw ( I have two screws) and initially pulled about an inch of brake fluid with lots of bubbles and then zip. I get zero brake fluid now.

What could cause this? I have no signs of any leaks and the brakes were not bad before I rebuilt the calipers. I read somewhere that I might need to bleed the proportioning valve or even pump into the caliper some brake fluid through the top bleeder ?

I ordered a Motive pressure bleeder which arrives in a few days

[rjames]

I could never get the brakes bled properly until I installed speed bleeders.
Those combined with using the motive at the reservoir to pressurize the system followed by a pedal bleed was the ticket for me.

If you've got all of the old fluid out you could run clear tubing from the bleeder all the way back to to the reservoir. That way you're not wasting fluid, you're just circulating it until the air is out. Run the tubing such that you can see it while you're pumping the brake so you know when the air bubble are gone.