The owner/operator manual for the 372XP/365/362XP shows that the needle bearings in the clutch assembly should be greased. I can't seem to get any grease in via the shown method -- grease gun on the end of the shaft. There does not seem to be any channel to send the grease where it needs to go, which certainly explains why it doesn't go anywhere but all over the end of the grease gun nozzle. No such problem on the 346XP. What gives?