The only picture I can find is less than ideal, but it appears your wiper arms are pressed onto splined shafts. Those are held on in a number of ways. The easiest to remove are those that just slide up off the shaft, but they usually are tight from corrosion. Most mechanics have a special rubber-covered pliers that puts pressure between the arm and the sheet metal to push the arm off.
Some arms have a clip that prevents them from coming off the splined shaft. You'll see a little tab on the side right by the pivot. You have to raise the blade up off the windshield to allow that tab to move. That moves the clip out of the way so the arm can be lifted off the shaft.
Another style has that same tab on the side, but you raise the blade again, then press on that tab to engage it, (or you pry that tab out 1/8"), then let go of the arm. The tab will hold the blade up so you can use it as a lever to wiggle the pivot and get it to come loose.
A similar style uses a pin, about the size and length of a small finishing nail, to hold the blade up. You'll see a tiny hole on each side of the arm about an inch from the pivot. Raise the blade, insert the pin, then use the arm as a lever again to wiggle it.
A totally different type of arm has very fine splines and a nut that holds the arm on those splines. You have to pop up a plastic cover on the pivot to see that nut. Very often those nuts work loose and the arm can shift position, or it can fail to move with the other one. With those, you just push the arm to where it should be, then tighten the nut.
With the larger splines and the arms that slide on and off, there's fewer choices of where to set it, so it's harder to get it wrong. Figure out how much you want the arm to move, then just remove it and reinstall it in the new position. With the arms that just slide on and off, a spring that holds the arm against the windshield makes the pivot sit at an angle. You just hold those on the pivot, then push it down against that spring pressure and it will straighten out and the splines will slide together.
Tuesday, January 14th, 2014 AT 11:43 PM