Product review (5 stars): Easy to install and fixes down only problem
This fixed the problem where the compactor would go down, but not return up.  Very easy to install. took about 30 minutes all together.  You will need to supply your own grease as none comes with the kit.

Open bottom of compactor
Hand crank the compactor all the way to its up position
Replace gear
Grease gear and chain
replace bottom cover
Done

Compactor works good as new.