Update on the effort. And adding information since early 80's had variation in parts.
1985 C27 with 1" shaft. 2" width on the packing/stuffing box flats, and 1.7" on the lock nut flats.
The packing is 3/16". I tried 1/4" and it is too large. My in situ measurement given earlier was in error. The stuffing box ID is 1.39" (minus 1", div 2 is 0.195", which is close to 3/16").
I went with the Teflon flax packing, instead of GTU, due to the galvanic corrosion issue.
Due to the worn shaft as discussed above, I decided to move the stuffing box by replacing the hose with a different length. The Hose measures around 1.64" ID, close to 1-5/8"
I did not have room to use this tool. I removed the packing and screwed on the stuffing box for as much room as possible. No luck. I looked around for shorter screws, but this is probably 7/8", which I could not find. I would have had to order and wait another week.
I improvised by cutting some threaded rod with a hack saw and using a socket sandwiched between the gearbox flange and the coupler. I tightened the threaded rods pulling the coupler to the GBX until the shaft was pushed out. I had to use a short socket first, then replace with a longer socket.
I tried a screw first, but was worried when I saw the shaft wobbling when rotating. So I replaced with a socket, after figuring that the wobble was due to the coupler and GBX flange not lining up properly. I don't think anything was damaged with this method.
And I found that the socket, having a larger flat diameter was easier to work with. I used a 16mm, but probably up to 24mm would work. (you see how seamlessly I sneaked in a different measurement system?)
I had to put a locking wrench on the nut at the GBX end and turn the opposing screw.
Next step is to receive the new hose and put it all back together (praying that assembly is easier than destruction, I mean disassembly).
