Kubotabooks will have the B7100 three part manual, I do believe what you need to know is in there or Look at the L185..... manual, it has a similar steering box setup.
Thanks again mate. The L175 had the correct proceedure I was needing. I now see it is alot more involved than simply renewing just the bearings. My previous research on the topic was pretty unfruitful, so thanks for the manuals (I think years ago you showed me them, but I since forgot all about them).
Seems to do it properly I would need to take the pitman arm off and the take the sector shaft out to line up the centre marks of each cog, and should also shim the top of the case while it is all freely moving.
I have decided that the bearing case broke because it was blindly knocked crooked out of its race, as the steering rod came down ontop of it when the sector gear and worm gear were pushing past into their top most, working, place.
Thought I'd have one last go at making the cogs marry up while somehow ensuring the lower bearing stayed seated by view.
For anyone in the future that needs a quick fix: If you take off the steering rod outer sleeve (cover that bolts to the steering box, and that houses the top bearing race) from the rod it allows you to see just see just past the edge of the sector to the bottom bearing cage.
I then had to remove the steering angle limiter stop off the left wheel hub (the left turn one) and this gave me a couple more mm of the sector gear rotation to get it to mesh past the tightest tooth, in what appeared to be the highest range both cogs should ever travel.
Then refit the limiter bolt to the hub in its original position and check it hits the axle well before the steering wheel rotation would bind up at its cog limits (i feel the steering colunm would raise up out of the bearing seats, or bind downwards when it wasnt meshed in the right spot)
It all now works really smoothly, at least for now, to get me by while I await for pitman arm puller kit (front end loader framework is going to problematic), propper shims for the top bearing cover , and a new lower bearing (just incase).
Hope this helps someone (maybe me in the future with my forgetfulness
)