Kubota B4200 front knuckle grease points

[TKBlanc]

I recently purchased a Kubota B4200 4WD. It looks very much like the B5100/6100/7100 tractors.

There are grease points on top of the front wheel steering "knuckles" (not sure what to call them). Seems like I can pump a lot of grease into them without seeing any coming out the seals around the knuckle. Do they hold a lot of grease? Were they just very dry? Oddly, there's nothing in the manual about these grease points.

Thanks.