As of 2/1/2019, we've added an optional heavy duty torque limiter gear as well as the rubber boot that is shown in the photos on this page. You'll find both on the DIY/Parts page.
Grease the screw assembly through the zerk on the side of the cylinder.
Remove the gearcase cover. Wipe out existing grease and any water that has condensed inside. Replace with low temperature lithium grease.
Add a dab of grease inside the brass bushing on the gearcase cover.
Reinstall cover, cleanup, and you're ready for another year!