Quote:I pulled the concaves awhile ago on our 07' 9660 and the front two rows of threshing elements on the rotor still have most of the factory finish on them. In other words, this part of the rotor is doing little or no thrashing at all. Was wondering if anyone else had noticed this?
That is the beauty of Gopalite. That is the "finish" that you are referring to. It is a high wear material that is sprayed on and then baked in a hydrogen oven. The rear three rows (not on the cone) do not have Gopalite unless you bought the high wear package. Deere only offers Gopalite elements for the front 2 rows that are on the cone of the Bullet Rotor. Through service parts, you can get the rear rows with or without Gopalite. With the Bullet Rotor, those front elements on the cone got a lot bigger and a lot more expensive, so all of them get Gopalite so you don't have to replace them as often as the front ones would always wear out first on the original rotor.
All that being said, take a look at your concaves. Are they worn out more in front than in back? They should be if you are utilizing the entire threshing length.