Ohio__Steve
Guest
If you are wanting to change the bracket in the wobble box to the style used in the 1020's i think it would fit OK but would want to be sure that the corresponding knife head would give you the correct registar on the 820.If you are wanting to change wobble boxes I think there are some differences that would require quite a bit of changing, such as pulley alignment. Would suggest another fix for thought. Usually when it becomes hard to keep the bolt tight the hole is showing some wear. This can be repaired by drilling it out and welding in a bushing ( catagory 1 to cat 2 top link bushings work well and are easy to find)..also check your cutterbar , because if the knife is driving too hard it will SOON ruin the best of wobble boxes even to the point of shearing off the new style bolt.