problem with brake master cylinder

[aristico]

Hey all, hope u can help me with this.

I have a 1968 f100 i keep having a problem where the brake fluid goes out of the master cylinder when i hit the brakes. I have changed the master cylinder three times and keep having this problem. What is going on here?

Thanks in advance for your help.

Tico

[Bigun11]

Through the search function you'll find information on this. I had this problem and resolved it by adding a second gasket.