[Sundancer268]

Try working it back and forth, maybe gentle prying, I never removed mine when I had to replace the spider gears back in the late 90s so even though I was deep into the axle I never touched the hydraulics

 

[Sundancer268]

No problem, we have all been there

 

[Sundancer268]

Slide it back and use some wet and dry sand paper on the shaft, probably a slight burr stopping it from sliding off. 360 grit or similar should do it

 

[Sundancer268]

Called a woodruff key and locks the oil pump/ motor gear to the shaft. Don’t forget to put it back in or you will not move

 

[Sundancer268]

You missed something and will have to carefully look at the JD parts catalog to see what was left out of the build. The Factory service manual might provide a clue if you have it. Unfortunatly I am on the road until just before Memorila Day and can't send the sections of the manual you might need. Look on Tuff Torq's web sit and down load the K92 manual, I am told it is almost identical to the K91 and could be all you need to finish up the Job. If it was me, i would quit for the night and get a fresh start tomorrow.