Corey Rankin

So I have this beat to hell cavi and the brakes are junk. I pulled the master cylinder and abs unit off, have a new master but ended up with dirt inside the gears on the abs units. How should I clean those? And what kind of oil was in there? Was it just brake fluid? Also there are two small green ummm things... On the oldmaster cylinder with o-rings. That the abs unit pops into, can I just buy those or how do I get them out undamaged? Any help is appreciated