There are no adjustments necessary after replacing the cutter bar.
Remove the subsole.
Remove the front two hex cap screws that secure the inner shoe.
Remove the inner shoe.
Remove the back two hex cap screws and stud.
Remove the old cutter bar.
Replace the new cutter bar.
John Deere Parts Catalog PC-1382 recommends 5/8" x 2 1/4" hex cap screw #19H1824 as displayed on page 32.
Recommend that Grade 8, 5/8" x 2 1/4" hex cap screws be used with lock nuts on the back.
Replace the back two hex cap screws.
Replace the inner shoe and stud.
Recommend that Grade 8, 5/8" x 2" hex cap screws be used with lock nuts on the front.
Make sure that the knife drive yoke does not hit the top of the front hex cap screws.
Replace the subsole.
Hope this helps.