I just replaced two spindles on my Scotts L2048 with those that have the greaseable zerks. They took about 30 pumps each to get full. Am unsure as to how often they will need to be re-greased?
Also, I changed the straight zerks with 90 degree fittings as they will be much, much easier to fit grease gun onto. Other than that; mower works/cuts as well as [if not better than] new.
Greg