I have a Sears air compressor Model 919.152812 6HP 60 Gal. I know I need an overhaul and need to order the parts. First I have to be able to take it apart.......this is my problem. In order to take it apart you first need to remove two screws (parts SSF-553) . I can not make anything fit the screw heads. I need to know what type and size the screw heads are so I can use the right tool. With that I can go ahead and take it apart and order the parts I need.