Needle hits feed dog, Singer 153K103

[SaraJ]

I have a Singer 153K103. Sometimes when sewing, the needle changes position and hits the feed dog. When it does i have to adjust the needle in place by pushing the needle bar. After doing that it stays in place for a while but suddenly it hits the feed dog again... Why?

[kgg]

1 hour ago, SaraJ said:

I have a Singer 153K103. Sometimes when sewing, the needle changes position and hits the feed dog.

A couple of questions:

i) What size of thread are you using?

ii) What size of needle are you using?

iii) how thick of material are you trying to sew?

iv) Does it happen on straight runs or when doing curves?

kgg