HoYa

I recently bought a 3 ton jack, and finally got rid of my “autozone” ones. Having never i got it home, bled it, fill it with hydraulic oil and then greased the pivot. I greases it and greased it waiting for the over flow to pop up over fitting. It didn’t. Instead I noticed the grease was coming out of the sides where the mechanism moves. do jacks have seals to keep the grease in? Is this a problem ? i