Well I had never worked on one of these either till mid last year and I did not have the luxury of an exploded parts listing.
If it is too small, scan it into your computer and print it out larger.
If it is still confusing draw over the lines with coloured pencils to make it clearer.
They were very expensive mowers, down here about the same price as a family sized 6 cylinder car so not a lot of them around.
A fairly simple operation but a lot of bits that could be giving you grief from worn out bush through to a bent tie rod or loose tie rod end.
We are here , you are there and you have the real thing in front of you.
There is a dozen or more bits that can be causing your steering problems and the biggest one is it is an obsolete mower so there is a very limited supply of spares.
I spent around 3 months working on that mower as I had to make all of the NLA bushes.
I do a lot of mowers so some time I get a bit fuzzy but from memory we took the rear body work off of that one to get better access.
And of course, don't forget to take lots & lots of photos.
Expect every pin to be rusted in solid, all of mine were and to add to that there were some dodgy welds including over the top of one of the roll pins.
A real PIA job, but the owner is a really nice bloke and under treatment for Hep C so was very ill at the time + had not worked for 3 years so had no money either.