im trying to bench bleed my new master cylinder i got from auto zone but for some reason when i press that thing in no brake fluid is coming out of the bleeder lines i have hooked up to it.i got two little plugs and some plastic line with my new master cylinder from auto zone.what could i be doing wrong cause theres no fluid coming out at all...should i turn that little screw on the bottom of the new master or no?thanks any info will help!

 

i looked it up on the internet is this how i do it?...i take the cap of the resiovor or how ever you spell it...put the lines in the resivor and keep stroking the master with a screw driver untill no air bubbles come out?

 

That is how I've always done them. Just go slow and steady with it.

 

Will need to remove the master brake cylinder from the booster to bleed the master cylinder properly. Use an old push rod or something that is long and has a round point, when bench bleeding your brake master cylinder. Make the master cylinder reservoir is about 3/4 full of clean brake fluid, and the two rubber hose coming out of the the port holes on master cylinder are submersed in the brake fluid during the whole bench bled process. Push in the piston on master cylinder, till it bottoms out, there should be no air coming out of the hoses when you have completed bench bleed process. Process should take about 1.5 hours.

Here is the master bleeding section: http://www.classicperform.com/TechBook/BrakeBleed.htm

 

correct, and when the master cylinder has been installed in the vehicle, bleed and flush out the brake lines.

- buck -