Hello: Can you post a picture or video of the part you fixed and what you did? I am having the same issue, but I’m uncertain of the roller part you are referring to.
secondly for anyone who can help: I am tuning my machine and I am having issues identifying my machine year and model and the proper service manual for it.
it is what I believe a newer machine mid 70’s but I can’t find a manual that matches. I have found a couple with different info for timing. One states to set the stitch length at 0 and the other at 3. What one is correct? I imagine if I set it wrong the machine won’t function.
https://share.icloud.com/photos/052DjIP4iNUYYIlxqk_eoEqLg
https://share.icloud.com/photos/001zzw8yNN3TntZVUbHZFmWyQ
https://share.icloud.com/photos/0aecwxLc5oSNgnoBbVfA0xtBg
https://share.icloud.com/photos/031LJwDzeU_rgQ1wWAiZkk8yA
I attached some pictures I’m hoping they show up, and help.