Hi everyone. This is my first post from good old England. Please be gentle with me.
My husband has bought me an Adler 67 machine to have a go at making leather upholstery for a Campervan he is in the process of converting. I am a 'hobbyist' who enjoys sewing but I'm on a steep learning curve. The machine is sewing but the handwheel was quite stiff to turn and the thread underneath had been jamming occasionally. Hubby has stripped the bobbin holder down to clean it out, with everything stripped out the handwheel is freely turning. Unfortunately, one of the parts look broken and after some research on youtube, I think it's called a bobbin case opener (pictured below).
Can someone tell me how to find a replacement part? I am struggling with trying to find a part number or any information regarding this item. What does this part actually do on the machine? Could this be the reason for the stiff handwheel?