Singer 338- raising presser foot does not release top thread tension

I have just acquired a beautiful singer 338. I have cleaned it up and oiled
it and it's working just great. The only problem I seem to find with it is
that the thread tension is not released by raising the presser foot. I kno
w the mechanism works by pressing against the tension assembly where the li
ttle peg enters the hole into the case. But I'm unable to see any parts mov
ing in that vicinity when I lift the presser foot nothing is engaging with
the tension assembly to release the top tension. Does anyone have any exper
ience with this? How would I go about fixing this? Thank you in advance for
your help.
Reply to
kswink9503
Probably the bar on the plastic cup the pin pushes is broken only thing you can do is replace tension.
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Reply to
Ron Anderson

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