I've never really cleaned anything under neath the aerator except the tines....get the dirt out of them so the moisture won't rust the tines from dirt/plugs sitting in them.
It doesn't get really too dirty from pulling plugs. And I don't grease up the chains, since the grease will attract more dirt. There is a light film of grease from the factory on the chains....other wise I grease the grease zerts and keep up with general maintenance.
It's a great machine and once you get used to it....makes core aeration super easy!
Every time I aerate a yard.....everyone is really impressed with the job the machine does.
2013 Ford F450 Super Duty Truck
2010 Exmark Lazer Z 60" deck
2012 ExMark 30" Riding Aerator
2011 Lawn Solution Dual Hyrdo Aerator 24"
2011 Echo(backpack blower), (hand blower), (chain saw), (hedge trimmer), (string trimmers), & (tree pruner)
Craftsman 4.0 edger
2007 Big Tex 4ft metal high side 7' x 12' Trailer
2012 PJ 7' x 16' Dump Trailer
2012 Ecolawn Applicator model 200 Compost Spreader
2012 BillyGoat Force 13 Wheeled Blower & MV650SPH Commercial Vacuum