Yes, also, save the pads if you can, if you're handy with a needle and thread, you can always refoam them, but that said, others in this thread could give you better pointers on doing that than me. You will need to remove the rings to attach new pads, iirc, any 100mm pad will fit it except stock Beyer pads (the lip isn't long enough to grip the ring). I think someone else saved their Senn pads by making small incisions in the rear plastic of the pad in stead of forcing it out.
Edit: from 1991
http://20cheaddatebase.web.fc2.com/sennheiser/HD-560-2.html