Here is a link from Husky for their online manual. It has the factory part numbers for all of the specialty tools required to work on these models.
http://weborder.husqvarna.com/order_static/doc/HWEN/HWEN2000/HWEN2000_1019061-26.pdf
http://weborder.husqvarna.com/order_static/doc/HWEN/HWEN2000/HWEN2000_1019061-26.pdf