94BULLIT What are the negatives of having an adjustable top link??
I think the advantage would be if multiple implements had the same top pin height that didn't match the fixed top hook height. But once the adjustment was made it would probably never be changed.
A few years ago there was a TBN member that used pins and clips to fasten his adjustable top hook. He then didn't have to modify his implements that had different pin heights, just moved the hook.
Here is how I fixed it and still kept the hook adjustable.
<img src="http://www.tractorbynet.com/forums/files/attachments/404043-john-deere-quick-hitch-pin1-jpg"/> <img src="http://www.tractorbynet.com/forums/files/attachments/404044-john-deere-quick-hitch-pin2-jpg"/>