666 spring, poppet ball, screw

Top of the shifting assembly, on the shaft that the rod levers are joined to, is the spring, poppet ball, and screw. I was going through the lower parts of the assembly and trying to tighten things up by putting washers in the sloppy spaces, and all that was left was the top, and I can't see or feel those three parts. Would I be able to see or feel those parts from underneath, or would I have to take the cowl off to see from the top? I do feel a maybe 1/4" hole in the shaft from the bottom, and I thought maybe it all is supposed to be through that hole, but I put an old cotter pin in there and it stopped right away, so something is still in there. I have the parts diagram, but it doesn't explain anything. What does this spring do? And the lever divider area has a lot of play there. Is it supposed to be tight? And does it matter if you use the older one-piece or newer two-piece dividers?
 
The spring and ball with set screw is to create a detent so you can feel when shift lever is in
neutral and lined up with 2nd gear and 3rd gear. There is no detent on the other gears because you
can feel you are at the end of their travel shift the lever cross ways. The round shaft that moves
back and forth in neutral has a groove in it that the ball is supposed to drop in so you can feel it
on the lever. It never was a very good deal even when new and when used a lot, the groove gets
another groove cross ways in shaft from ball under spring tension wear the shaft. Clear as mud,
right.

Also, has nothing to do with the other detents on the shift rails you feel when dropping into gear
and also in neutral. It is strickly for the shifting lever.
 
pete 23, thank you for the explanation. I think I'll take off the cowl today and see if I can see things from that way. I've read some people find that the spring and ball are missing. I'd like to see if they are there and I'd like to see what it looks like in person instead of just on a tiny parts diagram. Boy, am I sore from working on the other shifting parts in that tight spot yesterday: sitting on the floor, in front of the seat, under the steering wheel behind where the battery was, and with one leg under the clutch pedal.
 
Wow, can't say I ever got in that position when working on a 656.
But being an old man, over 80, I guess I am able to say, A 656 can
be miserable to work on. Even when working on A TA rebuild on
older models, you can hang up every thing from seat forward and
back the ta from clutch and transmission out from under. Not that
easy on the 656.

I always tried to talk owner into letting me eleminate those
miserable front hydraulic outlets plumbing. Makes future repairs
much easier saving a whole lot of labor.

To really get at that upper shifting mechanism, it is necessary to
remove the hydraulic valve mounted on top of it. Lot of updated
parts may need replaced.
 

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