It may depend on the year. Some have pressed-in pins, that are hard to replace, and some have roll pins that are very easy. My 87 had the roll pins. You can get a pin kit from the dealer for the pressed in ones that includes bushings, I think, or, if you can punch out the old pin remnants, you might be able to get a replacement from the auto parts store. If it's a roll pin, go down to your nearest tractor store and get a 1/4 inch roll pin and pound it in. It will push the remnants of the old one out. I don't remember the length, but standard ones are either a little too long or a little too short. Get the long one, and when it wears you can just tap it down a little more.