If I have to split the cases do I need any special tools?
Tim, The only special tool you will need to split the case on that, is a #2 Phillips screw driver. :msp_biggrin:
There is about 7 screws, maybe 9, can't recall off hand.
Poulan had a "special" service tool set for them, but I have never seen them for sale. Was mostly for removing and installing seals & such. To get things the proper depth. But all that can be done without the special tools. Just use common sense, and kinda ck to see how things were set from the factory when pull things apart. They are pretty simple and easy to work on.
As far as your bearing slop measurements go, You will have to go higher up the knowledge ladder here than me for whats acceptable.
Gregg,