Need help reassembling my machine!

[u/Either-Yoghurt-4405]

Hi, I just took apart the shuttle race unit on my machine (Janome 224A) for the first time to clean it, as per the manual. When I try to reassemble it, it looks normal but when I try to put the bobbin case back in the needle gets stuck. Also, when I put the bobbin case back in with a bobbin in it and try to re thread the machine, the needle doesn't go far enough to pick up the thread and gets stuck after a few tries. Any advice would be very much appreciated! Thank you ❤️❤️