yup 1/4 turn at a time
you can also unlock the steering and see how much it moves back and forth before the pitman arm moves ,, i took min in three turns when I first bought my truck ..
then i fine tuned the last few increments so as to not over tighten
long wrenches help I also drilled the end of a piece of small barstock and put the Allen wrench in it to make an extension
ps wear gloves the splash guard/inner fender is brutal ,, but a block of wood will help hold it up a little
the wrenches and allen are all metrics
clockwise with the Allen tightens the play that's not what I would call to the right that might be misleading do to where you are looking at this procedure ?