crushingday

I am trying to do my brake master cylinder myself. First venture into something this major.

What is this black vaccum hose and where should it attach?

Thank you Stan and Jon (captslow) for the advise and tips. I have new grommets and an "O" ring and snagged some little packets of Dow Corning 111 for $1.09 a piece.

Not sure how I'll get the air out of the hard line that comes off the front of the master because it loops up off the top like the St Louis arch.
Is it safe to assume I need to get a Mity-Vac?

Rob Edwards

It's from the vacuum canister for the cruise control. It's one of the two lines that attach to the three way splitter, before the 4 way splitter in the pic below:

crushingday

Thank you sir!

crushingday

New Brake master almost in. If I can just get the front and fender side hard line to start threading.