ok don't try and take the axle out of the 'cup'.axle is held in with a clip that is very hard to dislodge.repack while together.if existing grease is contaminated blast out with a degreaser gun till clean,flush with kero,hang up axle end down to dry then repack with fresh grease
on another note- if you have less than 10mm axle end float you 'apparently' don't need the clip on the axle which would make changing a c.v easier.with a locker installed most stop the axles going in towards each other at the diff centre and have no need for the clip to be fitted,I installed a set of Dirty 30's axle and birfield joints and measured end float-was only a few mm but clips are on.
You need to have the stub axle at a hard angle to the axle. Get a block of wood and put it over the cv. Hit it very hard with a hammer. Should pop the cv over the clip. I have always used this method and I have changed a few cv's out bush because of snapped stub axles with a lokka.