The lower jaw and top jaw no longer fit together

The lower jaw closes slightly above the top jaw and has a some play from side to side. youTube has a video on “replacing the lower jaw” which is so slack the user cannot direct the cut properly. The solution turned out to be a worn gear. Another issue discussed talks about the top jaw needing to be replaced for this problem. I can send a picture. Can you provide me with some insight, please. The Lopper is about 10 years old. The Lopper also has a loot of different screws and bolts that need to be removed. I you can suggest some tools from your shop, I will appreciate it.

Beth