Manual steering box

Corn head grease?
Yep it's the correct viscosity grease to the FSM and cheap at about $5 a tube. When it warms up from engine heat it becomes an oil. Easy to fill if you're rebuilding a box, or you can warm it in a can to pour in... or "Popsicle stick" it through the hole. I'm sure it's easy to find a John Deere dealer in Ohio !