Brake Bleeding Nightmare

First topic message reminder :

I've just overhauled my rear brake caliper. Soda blasting, new pistons, new seals, new banjo joint washers. Also overhauled the rear master cylinder. Clean up, new piston and seals kit and new banjo joint washers. Now I'm trying to bleed them.

Bought a vacuum pump system which seems to doing the job of sucking the fluid through. Did the front caliper first then the rear. The system has been drained of all fluid so I'm starting with empty lines.

The front one kind of went OK, I think, but the rear one just keeps pouring air bubbles out. The brake lever is offering 'no resistance' at all. I've used half a litre of fluid so far and I would have expected at least some resistance from the lever by now. The only result so far is that the caliper pistons have moved from the fully home position to resting against the pads, but no pressure from the lever.

Does anyone have any experience of this or have any tips or tricks. I don't want to waste any more fluid until I'm sure I'm doing it right.

"A vacuum bleeder really shines with coupled or linked brakes. Harbor Freight or Amazon lists these tools."

This man knows whereof he speaks. I bought a Pittsburgh brand Pneumatic Brake Fluid Bleeder at Harbor Freight for $25. DOT 4 brake fluid was $5.00. Bled the brakes in under half an hour. Super easy.

Just be sure you use plenty of painter's tape and/or old rags snugged around the brake reservoir. I've heard if you spill brake fluid on the tupperware things can get ugly.

Brake fluid does indeed eat some paint and plastics. Also if you're new to rolling your own on brake bleeding be sure to use the appropriate brake fluid. The required type is Dot 4 in the US. The correct fluid number is molded into the top of the reservoir lid.

uuuugg i just did changed my whole break lines break fluid, took me 3 days and a line redirecting as well as a whole bottle of fluid. i just hate how to have PERFECTLY align the hole with the screw near the reservoir but its pretty good now

Wha...? You replaced all your brake lines? Why?

Then you disassembled the fork stem? Why?