Sorry about spelling; but yes those are the sleeves that when tightened hold the pulleys on the shaft. Now, if the belts are loose that is the bolt on top; 1st have to loosen the 4 bolts that anchor the top pulley to the mower.I had the same issue with the oil. Went to get the second quart and as I was putting it in I looked and oil was going everywhere.
When I mentioned this to support he said "oh yea" the manual is wrong. He also told me not to go by the check plug but to fill the gear box until the shaft you can see through the fill hole was covered. So the manual was wrong on multiple things just for filling the gear box.
Also the oil fill threads are so messed up I can't thread a plug or vent into it.
Gearbox will have to come off to get rethreaded. Another expense on this thing.
What are the "swellable sleeves"? Are these what holds the pulleys one?
I checked belts and they were very loose.
Mine was ~$2400 and is still inoperable.
I was able to talk to one person last week and now calls and emails are unanswered.