Teenietech , Open the tear down link below. Go down to step 3, click on the second image so it displays larger, now click on the magnify glass in top left of pic., now drag magnifier down to large grey drive wheel being driven by belt and click to magnify that area. To me it looks like you can barely see the loop of a spring attached to the discolored plastic lever and running under the grey drive wheel. Maybe not, but have a look. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
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