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Shift Cable Query

edcourter

Member
After trying all winter to armchair diagnose a slipping, and then no, reverse (Alpha One 86) I heeded the advice of our forum members to just pull the thing apart and look carefully at all the linkage before you go dogs and gears $$$. Good advice, because although everything was within tolerance and appeared that it should have worked well, good dog grab (10 and 12 Oclock), all reasonably tight motion,,, The nut that holds the shift cable on the gimble wall was about 3/16 inch out and was holding the shift slide (where the cable terminates and the lever roller slides) out. This would stop the reverse stroke short of the end (10 Oclock). This stops the reverse motion which I think should be set by the stud position on the shift plate lever. The three choices are, It worked its way loose, it would not thread in far enough to start with or the cable twisted in when installed and spun it back out over time?

Year wise, this is not one of the drives which would need to be tapped out for the new style cable. The total throw on the radial part of the linkage is around 65 degrees. Everything on the engine shift plate was dead on. It is not the original cable. Is this the problem that caused my reverse to fade to nothing over last Summer? Is 3/16 too little to mater? If I was just in my backyard lake I would probably just grind the forward end off the slide to get the extra throw, cob. Thanks to all
 
When I do a shift cable I run the tap thru to clean the threads and insure that the nut bottoms out
that is why the manual says to install the cable with no more than 2 threads visable otherwise reverse will be compromised
 
Two threads are .11 If I am at .18 with no (or just tapping the dog points) engagement...... would another 70 thou fully engage reverse from miss to full lockup? If so it seems like too little tolerance for all the linkage parts and cables?

Using the Number 6 Manual test (paper protractor) I have 10 degrees linkage play from lower shift rod down, 12 is no go.
There should (big stupid word) be some clearance off the nut even with the shift plate stud in the full up position.

I'll reassemble with new cable, slide and lever and see what's left for clearance.
 
Dont over think the issues here. You degrees seems fine. basically at twelve o clock full forward and at ~ 9:00 is reverse but not quite 9.

Look at the bottom of the vertical shift rod in the gimbal housing and look at the upside down U shape that moves the shift rod in the drive. Make sure it is not bent. Also look at the bronze piece that the U shaped piece turns. The bronze piece in the drive. How does it look? nice clean edges or are they worn or damaged?
 
The rod couplings seen snug and clean, some play in the roller on the lever and in the slide. I hope to loose some slop with both new. I ordered a tap to seat the cable nut better. My almost 9 on the gimbal puts the slide tight to the nut? Maybe a out of spec replacement lever or slide, I've seen some really bad parts lately.
 
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