I spray the disc at the hub with Plus gas and use an SDS drill in chisel setting to rattle it for a minute or so close to the hub centre.
It soon gives up.
I would save the gear puller as if the disc is pulled unevenly, it may jam on the hub. Hitting the outside of the disc looks like it gives the best leverage but hammering at the hip flange, not too hard, will break the rust bond. We are all assuming that you have found and removed or at least beheaded the retaining screws.
I would save the gear puller as if the disc is pulled unevenly, it may jam on the hub. Hitting the outside of the disc looks like it gives the best leverage but hammering at the hip flange, not too hard, will break the rust bond. We are all assuming that you have found and removed or at least beheaded the retaining screws.