Neutral switch stays on after assembling shift plate
Did you wind the switch in to fix a leak? Try turning the neutral switch out 1/6 turn intervals until it works normally, then fit a seal washer of that thickness. The switch turns on the green light when the plunger extends into a depression in the face of the lower cam wheel.
Is it possible that the circlip (Item 13) (you call it a Seeger Ring) has come off, allowing the cam wheel to move inboard?
[docc edit July 30, 2021: added red emphasis to @MartyNZ's correct answer. Thanks, Marty! ]
Or the nut holding item 20 post is not tight? That would allow both wheels to move inboard. (But only a tiny bit)
