I use my loader for hay work, moving rounds, loading wagons, filling barns, etc., so I work them a lot. I use the same grease I grease everything with, Mobil synthetic. I use Mobil because one, it's available to me in 150 pound open head drums (I have an air greaser) and two, it's relatively inexpensive in bulk, about 300 bucks for a 150 pound drum.
I need a grease that won't come off in the field, has a high film strength and can be used in various applications, from wheel bearings to knotter gearing and the Mobil fills that bill.
It's normal for grease to come from a joint black. It's doing it's job, like motor oil, carrying away the dirt and contamination and the pins and links need only an almost invisible film of grease to be lubricated. if they weren't, they'd be squeaking and galling. Just keep on greasing every 10 hours or so with whatever you use. It's frequency of greasing (and changing fluids like motor oil) that provides long life.
...and yes, molybdenum disulfide is black. problem is, most moly additive greases have a clay base (carrier) and the clay base can harden in a grease cavity, especially if it's greased infrequently, one reason I don't use it.
I depend on my tractors and implements for farming, not a hobby, part time use situation. I need reliability when I use them.
