Just jack the wheel right up to drain the oil away from the end of the housing, pull the wheel,pop the end cap off, undo the castelated nut, remove the drive flange, wind in the adjusters and unscrew the brake drum, undo the 2 hub nuts and lockwasher and pull the hub - being careful not to damage the oil seal at the back.
Undo the 6 bolts on the backing plate, pull it off and put it back on properly.
Put it all back together and send the bill for 3 new brake backing lock plates, 4 new hub nut lock washers and 4 new drive flange gaskets (or a tube of goo) to your mech.
Could probably do it in 10mins a wheel - maybe less.
(I hope I haven't forgotten anything above... It's late and I'm a bit sauced. :D Cross check with manual first!)
