Truck Repair: The left wheel on my F250..., f250 ford, ford truck

Question
The left wheel on my F250 Ford Truck started making noise.  I took off the wheel cover and in center of hub it looks like the bearings have been eaten up.  I took off cauter pin, bolt and washer, what do I do next and is ther a manual or something to show me how to replace the bearings, will I need a puller?  It's a 2001 Diesel Ford Truck.

Answer
Is this the left Front wheel?  Honestly it would be well worth your time to purchase a book from your local parts store on this project; rather than me explaining something incorrect.  You should not need a puller to remove the front hub, but a hammer and a piece of wood might be required to get the hub off if the bearings are really tore up.  
Couple hints durring this project.  Always replace the seal when you remove the hub (cheap insurance) and if the left bearings went bad, inspect and pack the bearings on the right side also.  If your brakes are less than 50% replace them at this time (you already have it tore down anyway).  Hope this helps, if you have any further questions feel free to ask.