If the axle is the same as on the 178, then the tie rods will have notches in them that corresponde with the adjustment holes in the axle. The tie rod should also have 1 threaded end (King Pin end) for fine adjustment. The king Pins themselves don't adjust.
Hope this helps.
Thanks -- that's what I need, a threaded tie rod. For whatever reason, this one does not have one. That's the answer I have been looking for!
Not a threaded tie rod - he means to line up the relevant notch which automatically gives the correct toe setting for that particular track width.
Check the drawings in this Ebay parts advert:
TRK598 Tie Rod End Kit Massey Ferguson 165 168 185 188 Tractor +Late MF 175 178 | eBay
They have a setscrew to engage into one of the slots. You need to adjust both tie rods when you change track width.