I have a question that I know nothing about.

I will disclose that in April I bled my brake lines with the help of my dad and refilled. I had to change out a leaky seal which meant repacking all bearings and such.

For some reason my master cylinder on the trailer tongue is sucking brake fluid, it seems like I have to refill it every time I go out. This worries me because I am driving a 3 hr trip this weekend to camp at J. Strom Thurmond Lake.

There are no leaks, why would the brake fluid keep emptying?