Back off both brake cable adjusters as loose as they will go. The brake drum assembly should then simply slide off once the hub is removed.
That hub should simply slide off on it's own right now. The splines may be rusted, and may require heat from a torch to break the bond. If you use a torch, have a new seal ready to replace it if need be.
Alright guys told I would keep you informed the hub came off with use of maco gear puller and electric impact. Need a new hub now lol now onto the brake hub that boy much at all have sprayed with marvel myserty oil see what it does in a day or two. I do not think this thing has been off since the ATV was built