I got a 145-H3 from my dad. The hook timing is off and I need to adjust. Don't know much besides videos. Where can I adjust timing of the hook so it picks ip thread from the needle?

Hi , I just bought a Pfaff 145 - H3 from a good friend she was the second owner and has taken really good care of it but she said i should get it serviced but finding a service person is almost impossible where I live. I need to try doing it my self. Right now it seems to be sewing ok but every time i try reverse it gets all tangled on the under side. It is also a little noisy at times, I have been playing with the tensions that seem to be helping. But I am getting a little frustrated, I would like to start sewing some projects but it just isn't cooperating.

Could u show me how to install this Original Pfaff 145 545 #91-010 730-15 lever + screw and spring

Nice machine, but how difficult is it to get parts. How would you rate this against a Singer or Japanese brands?