Singer Sewing Machine 4552 Function Test 

hey im having trouble putting back the black thing where you put the bobin in. I took it out accidentally and am having trouble putting it back in ? is there any way to fix this?

Thank you for showing how to set up the machine in the first place!

Thank you 🙏

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I have the same sewing machine, but my machine keeps broking needle, with regular fabric, not jeans. Can you tell me why that's with my machine.