How do I remove this oiler from the headstock of a SB Heavy 10L?

[omni_dilletante]

Here are a couple of pictures from practical machinist:





Here are links to a few posts

http://www.practicalmachinist.com/vb/south-bend-lathes/early-10l-rebuild-teardown-inspection-290320/

http://www.practicalmachinist.com/vb/south-bend-lathes/heavy-10-oiling-cup-removal-issue-267537/

http://www.practicalmachinist.com/vb/south-bend-lathes/new-10l-headstock-oilers-192623/