A Ball joint press tool (Specially made C-clamp) is a necissity.
getting the old ones out is the "fun" part of the job.
You first need to remove the brakes, The "spindle" (tube axle)
then the shafts
This step is something a 10year old girl can do with a slide hammer and the correct adapter, without the tool I've seen grown men cry with frustration.
NEXT work on the lower balljoint nut (and it's cotter pin)
through the "open window" in the knuckle.
Once you have the nut out remove the Circlip from the upperballjoint stem and work on the "pinch bolt"
Once you have the pinch bolt out make a note of the orientation of the adjuster cam before you "worry" the cam out of the beam.
After you have the cam out the knuckle will essentially be "hanging" by the friction of the lower balljoint tapered stud.
To get that out you need a 3lb hammer.
whack the HELL out of the sides of the beam.
If you hit it right (as hard as you can which is generally
harder than you think you can) the knuckle will literally fall off the beam with onlky a couple of blows.
I can't remember the last beam I had to hit more than five times
to get the lower balljoint out of the beam....
but I've had practice...
LOTS of practice
AD