Originally Posted by
Charles Wahl
I don't know (without trying it) why the method I suggested wouldn't work: put the dropout side of the pivot (3563L, 3561, pivot body, together with the spring (3885), wind the spring up from the outside, hold the wound end of the spring in the slot at the edge of the pivot hole deftly with a blade, and insert the pivot bolt, engaging the keyhole in 3563L and trapping the end of the spring in the slot at the same time. Then 3561 is just a sleeve, and its keyhole isn't used.
You're correct that in its assembled state (or what's shown at the end of Kurt's helpful video), 3561 only needs to function as a sleeve.
As far as the method you explained, I'm not 100% I completely understand it, particularly what you mean by "wind the spring from the outside." As Kurt pointed out, tensioning this to 180 degrees is quite a bit of torque (enough to, say, strip a slotted aluminum bit
). In theory, if one could rotate the spring 180 degrees and get the tabbed washer (3563L) in place, you'd be fine...but I think the term "deft hands" would be an understatement.
I should note that 3563L cannot be rotated to the proper position if inserted in the untensioned state b/c of interference from the raised parts of the derailer body.