Whatever blows your dress up. How I do it and what you do are 2 distinctly different things and as far as setting a bailer on fire because of excess oil on the chains, I doubt that. Round bailer fires are caused by running dry crop at maximum diameter and the friction between the side sheets and the dry crop causes combustion to take place in the bale chamber and thus roasts the bailer. Has nothing even remotely to do with the drive chains at all. I run maximum diameter all the time but in net and I reduce the pto rpm substantially when wrapping a bale so as not to keep the fully developed bale spinning in the bale chamber at rated pto speed which contributes to the chance of combustion. I just increase the wraps to compensate for reduced rpm to get 2.5 complete wraps on a bale.... and I regularly stop bailing and 'feel' the temperature of the side sheets to see if they are getting too hot. Probably don't need 2.5 wraps, 1.5 would suffice but my bales get handled numerous times so the 2.5 is insurance that the bales stay intact and I use '52 over the edge net anyway because some of them are stored outside. Only been doing it 30 years now. Not a newbie by a long shot. On my 4th round bailer btw. I trade them off every 5 years while they still have value. Always buy new, never used and when I trade them in, they are 100% field ready and serviced and I get top buck for them always. Never replaced a chain or bearing on any of them but I keep my chains properly tensioned as well.
This last one I traded in for the Kubota (Kneverland) premium net twine bailer, my dealer actually gave me more than what I thought it was worth but then he knows how I take care of my equipment so he set the trade in value accordingly. Not me.