Leave that to more experienced people - never had an encounter with one (besides checking for leaks and looking at the ball for pitting/scratches etc...).
busters-photo-tour-landrover-repairs - Land Rover Zone is the place to go. First major job on a series I had to do was a swivel ball replacement - it's great fun. If you're stripping it this far you might as well do the lot - ball, seal, swivel pins, wheel bearings etc. If the grease has got out the water has probably got in.....