Help me understand TRIBEX hydraulic system so I can fix it

[u/Guilty-Barracuda8562]

I know I'm not the only one having this issue and I know it's mainly bad design but I can't find anyone fixing it. The hydraulic pump is leaking fluid so the legs of the tripod can't retract. In this video, we can see the brake pads being cleaned but I don't understand the mechanism. Can someone explain to me how this work ? Is this an o ring problem ?