sdhaevrsi

I think almost every machine I have worked on cleaning, oiling, etc. has given me trouble when I put the hand wheel back together. I have even taken photos step by step as I take them apart to clean and oil, and apparently (as far as I can discern,) get them put back together exactly as they were originally. Yet, the stop motion action doesn't work when I twist the knob. I have taken them apart numerous times, tried different positions, and still can not get the stop motion part to disengage the needle bar.

I have followed (I thought!) tutorials, diagrams, Tools for Self Reliance book...

Any suggestions on what I am missing/doing wrong?! I have read some people online that say sometimes you just can't get it to work, and then don't worry about it.