future_vision ...... Wipe off & blow out the two sections of the PTO shaft. You don't want metal filings in there. Possibly cause the shaft to not operate properly. The shaft will telescope - in/out - more for something like a bush hog. But even the shaft on my
chipper get dirty. And I only raise/lower it once a day when I'm using it.
The angle of the dangle has my PTO shaft most compressed when I lift the
chipper to full height. Like when I move from one location to another. From sitting hard on the ground to full rise isn't much difference but enough to make note of when shortening the PTO shaft.