Huh?
I've never done a volvo hub but if it's like other tapered bearing hubs, it seems all you have to do is remove the rest of the hub, push out the inner seal and the inner bearing, clean the bearings/races, lube the bearings and hube, put the inner bearing back in the hub, tap on/in a new inner seal, and replace the hub, outer bearing, washer and nut and tighten the nut to spec, back off the nut to the nearest hole so the cotter key can go in, and put the dustcap back on.

Generally the tightening torque is about 5-10 ft lbs, enough to seat the bearings or preload them and then back off. But make sure this is what a Volvo manual calls for. Check out a Bentley at your local auto store or check the FAQ.