Which nut do you take offIJ It appears that there is a nut behind the dust cap, which has a tapered roller bearing next, and there also appears to be a nut outside of the dust cap, which has a washer bent to hold it. How heavy is the whole unitIJ The spider that is cracked is the one with the key way machined into it. It is cracked on the backside opposite the bolt that tightens it onto the shaft around the keystock. I do not think that welding it would hold.