I asked about a burning smell coming from my John Deere 6620 combine yesterday. Got some good ideas regarding specific problems. So, I went and harvested a wagon load of corn this morning and immediately pulled the combine into the shed and shut it down. Worked around the combine touching every shaft and bearing feeling for heat and looking for damaged grease seals, etc. Nothing was hot. Everything looked and felt good. Was able to grab the counter shaft immediately at the edge of the bearing on both sides as well as feel the locking ring, bearing and bearing holder/block. Absolutely no heat after 30 minutes in 250 bushel corn. Seems like the smell is maybe getting less. I wonder if a belt had some oil on it and when the belt warmed up it gave off this odor. Possibly the same thing happens when all of the dust and chaff laying on the combine warms up. I did have several hydraulic hoses off this summer. So, I will continue to keep an eye on it doing a walk around and feel a couple times a day. I sure didn't want to rework the counter shaft at this point of harvest. Looks like it may have been rebuilt at sometime as the bearing holders/blocks look like new paint. Thanks for all of your suggestions.