I did that and lubricate bearings 2-3 times. Bad news. 1) got cracks in plastic shell where motors screw to shell. 2) I used special bearing oil, but dealer told me (later) it could affect some plastics. 3) bearings are sealed. No maintenance. If your motor sounds clanc- clank while turning by hand, just replace bearings. I've done with 2. Just fine after that.