Wayne, My Craftsman DYT 4000 Intek 2004 has grease fittings on the three pulleys. It is a 48", 3 blader. The two outer zerks show through the cut-outs on the decktop. The middle one is hard to grease but can be done in place with a flex hand gun. The manual says grease 'em. Some on the forum say the grease never reaches the bearings and the zerks are for warm , fuzzy feelings. I do not know since I have not had them apart (no failures). It does seem strange to me that I never see a bit of grease as I have pumped 3-4 cylinders into the 3 over the years. Finally I know the theory of sealed ball bearings-nothing to do, but I also know many times I have gently pried off the plastic seals to reaveal dry balls/races and restored proper action by cleaning (try WD 40 spray), packing and snapping the seals back in place (vacuum cleaner roller. drills, alternators, generators etc.) Try to see if the holes are threaded and buy an assortment of zerks-careful , some are metric. BTW it is a stretch for the EPA to fear a drop of grease, isn't it????
Edit. Haven't I seen grease gun adaptors with needle tubes to sneak grease past the ball bearing seals?