940 Half shaft bearing and seal - how difficult?

Was replacing the rear discs and pads on my 940SE (P/97 75,000 mls) today and when I took the near side apart was greeted to the sight of grease everywhere, inside the handbrake drum, on the disk, on the pads and shoes, and on the caliper. Yuk. It is obviously comming from the shaft, so I assume the grease seal has failed. There's no oil so I'm guessing the inner oil seal is OK (erm, or else the diff's empty!).

Question is, can anyone advise if replacing the grease seal (and bearing, as it has to come off I might as well replace it) is beyond the adventurous DIYer? Haynes manual suggests it's a main dealer jobbie, special tools etc. Can anyone offer advice?

Only positive thing is there's buggerall wear on the inner pad - can't think why! :)

Phil