The main shift clutch parts. On the left is the 2nd-3rd gear clutch arm, center is the housing, on the right is the 1st-reverse clutch arm. clutch pin is not in this photo.
The clutch arms thread into the housing.The inside of the housing is fully threaded all the way through. The small hole inside it is where the grease zerk fits.
Each clutch arm has a large slot cut across it. The clutch pin fits into these slots to actuate one or the other clutch arm.
The control shaft is here inserted through the 1st-reverse arm, and the pin is installed through the shaft.
Without the housing, here's w/2nd-3rd engaged.
And here's w/1st-reverse engaged.
1st-reverse engaged w/in the housing, minus the 2nd-3rd clutch arm.
The original clutch pin, very beat-up, and the fabricated replacement
And another view of them. Edges of the square end are not chamfered in any way, and it shifts fine on the bench
I've got one video of the mechanism in operation, and another of assembling it.
In operation:
Quicktime lo-q (400x300), 500KB
Quicktime med-q (400x300), 800KB
MPEG-4 lo-q (320x240), 330KB
MPEG-4 med-q (320x240), 800KBAssembly
Quicktime lo-q (400x300), 1.2MB
Quicktime med-q (400x300), 1.5MB
MPEG-4 lo-q (320x240), 800KB
MPEG-4 med-q (320x240), 1.8MBLet me know if any of these don't work for you. I'm not very familiar w/video encodings.