Two set screws on the left side head.
If you have a early belt drive from me the oil seal will needs to be removed. You no longer need it anyhow. Its to keep the gear lube in not keep grease in the top bearing.
As a side note the bottom spindle bearing you can grease from the two slots they cut in the quill but not the top bearing. If you add some kind of fill tube that can dab a little grease on the top bearing without pulling the quill lit it will save you some time in the future.