Air-draulic engine Butler tyre mower

Hello, I’m new here and I have a question about a butler tire moth with air-draulic engine.Although there are already some topics here, but not yet that right thing I’m looking for. Had just added a 1044S2 to me with side pulleys and I knew from the seller that she was only turning around left. I disassembled the machine at home, cleaned up for possible errors but found nothing. Again built together and just like before now my questions about which I come: 1.why does it turn around on the left and right only very slowly when the pistons and this wise plastic ring at the bottom of the machine still look top with the holes? I don’t understand that it turns in your direction with a lot of force and in the other almost not at all 2.the machine was quite strong with I would like to call it graphite oil full. And comes there basically oil in? roofed is only supplied by the oiler. If so which and how much comes in?