About to embark on replacing the Powersteering fluid in my 94 Disco I

Here is the relevent Page in the Rave manual..
It looks like another experimant in collecting errant fluids running every which way but into the container>>>

Any words of advice before I crack it open???

 

Yup...remove the return line from the resevoir and stick it into a empty washer fluid bottle, coolant jug, anything a gallon or larger.
Have your wife start the truck and while you keep putting new Dexron III into the resevoir she moves the steering wheel from lock to lock.
Keep doing this until the fluid coming out looks as clean as the fluid going in.
Replace the hose.
Top off and drive, check the fluid level again after driving for a couple of days.