Help on the 6x6 articulated hauler 42112

I was taking out this lego​ to play and suddenly the body and head got discconected. So I connected it again But now I found out that the head? part is tilted slightly. And I think that the connecting part from the head to body is the black gear? Is this right? What part is disconnected? submitted by /u/ShownPrism12150 [link] [comments]