If you have the dust cap off and the snap ring out that hold the hub assembly in, insert one of the screws that hold the cap to the hub and grasp it with pliers to remove the remaining portion of the hub, you will need to work it back and forth a few times to get it to pull out, once out you will have access to the nuts that hold the bearing in! I have attached all of the photos that I could find to show all of the components to the front axles for your convenience
DOWNLOAD HERE 1
DOWNLOAD HERE 2
I will be leaving for a couple hours and I will check in with you in a couple hours to see how you made out
take a look at the attached illustration and let me know what number part you are down to and we will see what we can do to get you the rest of the way.
Yes there is a key way, that part #7 should be a half moon crescent with a key at a 90 degree angle that inserts into the keyway on the spindle, if the key broke off of the half moon crecsent then it might be keeping the nut from turning, try to tighten it up just a little using the trick with the screwdriver to loosen the tension on the piece that is in the keyway and use a pic or similar tool to try and get the piece out of the key way