lube for your new pivot axle bearings
I always use spray graphite on this bearing.
lubes the bearing, but graphite will not collect dirt
I understand the old books said to not lube this bearing.
I had a friend who was a machinist rework the axle bearing on his old tractor.
he machined the bearings to fit the axles, then groved the insides of the bearing to carry and hold the grease,
then he drilled and fitted grease zerks to each axle bearing,
the front axle on his old tractor will last another 150 years. but would have cost $500 in machining time if you had to pay to have the work done by a shop.