manual steering box cleanout

It's a 00 grease just like spec'd. Idea is it's a light enough grease that the heat from the engine makes it flow yet not leak from the box like oil will. 5 bucks a tube at your JD dealer.

Sometimes referred to as "semi-fluid." I used to sell drums of the stuff to an antique Ford parts dealer who repackaged it in pint bottles for resale.
Also at NAPA: Gear Oil 32 oz SME 706612 | Buy Online - NAPA Auto Parts (napaonline.com)