Braking resistance behind the brake fluid tank

So and now my second entry and at the same time another question.
@Frank, that's why your phone rang earlier

Behind my - your probably also - brake fluid tank goes a hose long. This one is oily with me, and if I look further down (lek gears, ....) it is also a little oily there.
Since it comes from above, it can be bad a defective/tight steering gear. I've got some pictures of it.

Here too, thanks for the help.

Welcome
Björn, of course again to the South Sea Camp dear greetings