Yeah Garry, Thats the only way you can get the bearing, as a complete hub assembly. Having a look at it it would be be very hard to separate the hub as it has two halves pressed together. I used hand tools for me as my air rattle gun wouldn't crack the hub nut. Used a Jimmy bar wedged between the wheel nut studs to the ground so there was no pressure going back through the axle to other components while I undid the axle nut. They are on pretty tight. A bit of steel pipe on the end of a breaker bar did the trick.

