But why do you bleed?

red stuff

you can bleed on any part of your skin that is cut or wounded.

By using the bleeder valve by the boiler

Yes, its like can be an on and off bleeding ,it can be heavy at times it all depends on how the flow of your period is

Fill your slave cylinder using a hypodermic syringe (won't take much) and install it. Before you tighten the connection to the slave cylinder, bleed the air out of the line by filling the reservoir...