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I've never met a master cylinder with a bleeder on it. Okay, here's what to do: About 3/4 fill the master, then make a lot of slow short pumps on the pedal. Leave the lid off so you can see the bubbles on each stroke. Do not press far because that would force air further into the system. A lot...

Bleed it at the booster (air-pack). I'll add that I mount the master cyl. in a vise, put fluid in and work the piston in it to get most of the air out before I install it.