I have a set of Matoc MC-4 master cylinders and and Matco W 600 XLT brakes on my Back Country Cub project. Today I add brake fluid (pumped in from the bottom) until the reservior was full. I pumped and pumped the brakes and nothing. I pumped more and bleed them, added more fluid and still no brakes. If I pump the master cylinder rapidly about a deozen`times I get a little brake. Played this game numerous times with Clevelands and always won. I don't seem to be able to get all the air out of these. I was hoping some of the experts out there could offer up some of their wisdom.