I am restoring my grandfather's model 101.03582. An appropriate pin punch placed in the holes should remove the knurled nut. Zking's comments are correct in that the nut is used to pop the chuck. Mine still had an orginal slotted taper wedge with it as well but I never had to use it. You can...
Try Davenport tractor. They are a restoration parts specialist for old Deere's.
Here's the link:
www.davenporttractor.com/p-314-hood-fastener-tool-3-8-drive.aspxrt
I'm new to GJ forums with this first post. I'm amazed at the knowledge that is on these pages. I have an older Challenger by Proto 3/8" ratchet that has some sentimental value and needs repairing. The item number on the adjuster is is 1260-3. Is a repair kit available somewhere?
Thanks much!!